Irrigation If occular debris or chemical exposure is suspected erectile dysfunction lipitor buy levitra extra dosage 40mg low cost, copious irrigation is mandatory erectile dysfunction in diabetes ppt discount levitra extra dosage 60 mg amex. Delayed Closure in Operating Room Depending on the experience of the surgeon and resources available erectile dysfunction treatment honey order 60mg levitra extra dosage amex, delay in closure may be warranted to erectile dysfunction hiv medications buy 60 mg levitra extra dosage otc allow for experienced assistance and specialized instrumentation. Tarsorrhaphy, Frost sutures with bolsters, or an eye patch may be necessary to provide temporary protection of the cornea and globe. Remember to apply moisture in the form of basic salt solution or ophthalmic lubricating or antibiotic ointment. Posterior Lamella Lacerations Posterior lamella lacerations may only require tarsal plate repair. Deep, inverted knots, even if covered by palpebral conjunctiva, often lead to corneal irritation and even abrasion during the blink mechanism. Anterior Lamella Lacerations Anterior lamella lacerations typically only require skin repair. The orbicularis oculi fbers are densely adherent to the skin and will pas sively approximate with skin closure. Deep sutures tend to accentuate intramuscular scarring and increase risk of lid malposition, retraction, and ectropion. Lacrimal Canalicular Injury Lacrimal canalicular injury may require cannulation with repair or Crawford tube placement. This is best done in the operative setting and with ophthalmologic surgical guidance. Canthal Injuries y Medial canthal tendon avulsion and canthi laceration may denote naso-orbital-ethmoid fracture. Closure at the Lid Margin Closure at the lid margin should be done with eversion of the skin edges to help prevent notching. Lid Margin and Proximal Anterior Lamella Sutures All lid margin and proximal anterior lamella sutures should be cut with longer tails draped away from the lid margin. Tails can be secured with distally placed sutures or Mastisol (Ferndale) skin adhesive and Steri-Strip™ dressings. Superior Lid Lacerations In superior lid lacerations, particularly horizontal injuries, assessment of levator palpebrae superioris function is crucial. Muscle or aponeurosis separation from the superior tarsus will lead to traumatic ptosis. If bruising, edema, muscle contraction back into the orbit, or inexperience makes appropriate repair unlikely, the laceration should be repaired in a delayed setting in the operative theatre with ophthalmol ogy assistance. Visible Orbital Fat If orbital fat is visible within the wound, the orbital septum has been violated. Nasal Soft Tissue Injuries Nasal soft tissue injuries require closure in three layers. Extensive Nasal Vestibule Injuries For extensive vestibular injuries, soft silicone stents with mupirocin ointment should be placed to help maintain vestibular patency during the healing process. These are afxed to the caudal septal with a nonresorbable monoflament stitch (Figure 9. The mucoperichon drium is coapted to the septal cartilage using plain gut or Vicryl Rapide™ quilting mattress sutures. Endonasal mucosa reapproximated followed by realignment of the alar cartilage using 6-0 Prolene. Septal fracture reduced, vestibular margin at the soft tissue facet closed, and silicone Doyle splints placed. Severe Septal Mucosal Lacerations or Hematomas In cases of severe septal mucosal lacerations or hematomas, septal splints are advocated. Extensive Soft Tissue Undermining If extensive soft tissue undermining has occurred and/or the threat of subcutaneous dead space exists, the soft tissue envelope should be taped and dressed in a post-rhinoplasty fashion. Wound Examination Examine for underlying fractures, loose dentition, malocclusion, or other oral cavity injury. Orbicularis Oris Muscle Reapproximate laceration of the orbicularis oris muscle as a separate, central layer. The monoflament glides through muscle without tearing, minimizes scar formation, and provides a longer-lasting, strong, yet resorbable option for muscle repair. Red lip should be closed with chromic or Vicryl™ sutures, with attention to realignment of the “dry line”—the interface between the wet and dry red lip. Some surgeons advocate using silk suture material here, because of its soft quality and favorable “lie. Other Landmarks Other landmarks should similarly be reapproximated, including the white roll, the philtral ridges, Cupid’s bow, and the mental crease. Overt duct transection, if identifed, should be repaired in the operative setting. Fluid accumulation may not only promote infection and wound breakdown, but can threaten the airway if it continues to propagate (Figure 9. Contaminated Wounds or Wounds >24 Hours Mature y Use frst-generation cephalosporins (cephalexin, cefadroxyl) or amoxicillin + clavulanate (Augmentin). Tissues reapproximated in multiple layers, but unable to afx avulsed tissues back to mandibule. Ear or Nasal Cartilage Involvement y Fluoroquinolones (ciprofoxacin, ofoxacin) provide good antipseudo monal coverage and excellent cartilage penetration. In general, consider in more complicated cases, such as immunocompro mised victims, or in more extensive wounding. Human Bites y Use antibiotic prophylaxis if wounding is deeper than the epidermis, as human fora contains an abundance of bacterial pathogens. These topical antibiotics allow for high drug concentrations at the site of injury, while limiting systemic toxicity. Strong data clearly delineating reduction in infection rates are lacking for continued utilization beyond clinical closure of the epithelium. Once superfcial wound healing is complete (24–48 hours), there is minimal penetration into deeper tissues that would actually prevent cellulitic infection. Neomycin y Active against most gram-negative bacteria and a few gram-positive bacteria, but inactive against anaerobes as well as streptococci. Moisturization As moisturization has been shown to improve the rate of wound re-epithelization, antibiotic ointments or petroleum-based jelly should be applied until sutures are removed or resorbed. Although defnitive data demonstrating lower infection rates with antibiotic-containing options are lacking, application of bacitracin or mupirocin-based ointments for the frst 5–7 days is recommended. Daily Debridement Along incision lines, daily debridement of crust formation with dilute, half-strength hydrogen peroxide via cotton tip applicator should be implemented. Dressings While nonadherent dressings may assist with moisturization and provide a barrier for additional contamination during the initial days following closure, more limited injuries where meticulous wound care is anticipated may be left uncovered. In instances of large avulsion injuries or where signifcant dead space may be present, compressive dressings should be considered. Bathing While patients should be instructed to avoid soaking in a bathtub or pool for at least 10–14 days (or until all wounds have epithelialized), showering with gentle soap and water is encouraged after 24–48 hours. Antibiotics For grossly contaminated wounds, parenteral or oral antibiotic prophy laxis is routinely implemented; however, with minor and reasonably clean wounds, antibiotic use may be declined. Nutrition Adequate nutrition—often a challenge in polytrauma or burn patients, specifcally—remains critical. Patient and Caretaker Instructions Signs and symptoms that may indicate developing infection should always be explained at great length to patients and caretakers (assis tance with handouts is encouraged in this regard). Suture Removal Suture removal is generally considered after 5–7 days on the face and 7–10 days on the neck or scalp. Hypertrophic Scarring and Hyperemia Hypertrophic scarring and hyperemia are more likely to occur with traumatic injuries, especially in children, and can be lessened by application of silicone gel applied twice daily for up to 2 months after initial wound healing. Teeth from the animal or human attacker are always a potential foreign body in any bite wound. For small punctate penetrating wounds, it is preferable to excise the puncture tract with a 2-, 3-, or 4-mm dermatologic punch, thereby removing damaged and contaminated tissue. Tissue faps and associated wounds should be minimally debrided and copiously irrigated. Surrounding tissue may be slightly elevated to facilitate dermal closure with rather loosely placed 4-0 or 5-0 chromic catgut suture (or polyglactin suture if some tension exists). Loosely placed epidermal sutures of 6-0 polypropylene or 5-0 fast-absorbing catgut (in children) then complete the repair. Infected dog and cat bites are likely to be populated by Pasteurella multocida, Staphylococcus aureus, and Streptococcus viridans.
Wearing the same pair of gloves and washing gloved hands between patients or between dirty to impotence erectile dysfunction order levitra extra dosage clean body site care is not a safe practice erectile dysfunction treatment jaipur buy discount levitra extra dosage 40mg on-line. Doebbeling and colleagues (1988) recovered significant amounts of bacteria on the hands of staff who were just washing their gloved hands erectile dysfunction pumps review order levitra extra dosage now, not changing gloves between patients erectile dysfunction juice drink quality levitra extra dosage 40 mg. What to Do When Hospital and clinic managers, and supervisors as well, should first check Supplies of Gloves Are to be sure staff are not wearing gloves when they are not needed. In addition, when resources are limited and examination gloves are in short supply, soiled disposable surgical gloves can be reprocessed for reuse if they are: x decontaminated by soaking in 0. Do not reprocess gloves that are cracked, peeling or have detectable holes or tears (Bagg, Jenkins and Barker 1990). Surgical gloves should be used when performing invasive medical or surgical procedures. Examination gloves provide protection to healthcare workers when performing many of their routine duties. Utility or heavy-duty household gloves should be worn for processing instruments, equipment and other items; for handling and disposing of contaminated waste; and when cleaning contaminated surfaces. The best surgical gloves are made of latex rubber, because of rubber’s natural elasticity, sensitivity and durability and it provides a comfortable fit. Because of the increasing problem of latex allergy, a new synthetic rubber-like material called “nitrile,” which has properties similar to latex, has been developed. In many countries, the only type of examination gloves usually available are made of vinyl, a synthetic material that is less expensive than latex rubber. Because vinyl is inelastic (does not stretch like latex), the gloves are loose-fitting and can tear easily. Better quality examination gloves are made from latex or nitrile and can be found in medical supply stores in most countries. Because utility gloves are made of thick rubber, which is much less flexible and sensitive,e they provide maximum protection as a barrier. All types of examination gloves are very thin and should not be reprocessed for reuse (Korniewicz et al 1990). The advantages and disadvantages of different types of gloves are described in Table 4-1. Examination Gloves: Use for Inexpensive exam gloves are one Usually, only small, medium and large sizes; contact with mucous membranes quarter to one third the cost of may not be available in every country. Utility or Heavy-Duty Household Inexpensive; can be rewashed and Not available in every country. The thick available, double gloving using either new instruments and equipment that rubber surface helps to protect examination or reprocessed surgical gloves may have come in contact with cleaning personnel and waste provides some protection. Examination Gloves Deciding which type of examination glove is best for a task (if a choice is available) should be determined by the degree of risk of exposure (low or high risk) to blood or potentially infected body fluids, the length of the procedure and possibility of allergy to latex or, rarely, nitrile. They are good for short tasks that involve minimal stress on the glove and low risk of exposure. They should not be used by staff with known or suspected hands, because they may cause the gloves to break allergy to latex or for prolonged (>1 hour) contact with high-level down within minutes. Nitrile gloves have many of the same characteristics as latex but have better resistance to oil-based products. Sterile disposable surgical gloves always can be used, but because of their high cost should only be used when necessary. Sterile Glove x Have the circulating nurse open the sterile glove pack, laying the glove package on a clean surface. Alternatively: x Have the circulating nurse open the sterile glove package; then have the surgical assistant or scrub nurse, who is gloved, remove a sterile 3 glove and hold the glove open by the cuff. High-Level x Have the circulating nurse pick up the replacement glove with high Disinfected Glove level disinfected forceps. Alternatively: x Have the circulating nurse remove a replacement glove from the high level disinfected container with forceps. Have the surgical assistant, 3 If the assistant or scrub person’s gloves are contaminated with blood or body fluids, have someone with uncontaminated sterile gloves pick up and hold the replacement sterile glove. A poorly fitting glove can limit your ability to perform the task and may be damaged (torn or cut) more easily. These conditions may damage the gloves (cause breakdown of the material they are made of), thus reducing their effectiveness as a barrier. Infection Prevention Guidelines 4 7 Gloves For most sensitized people, the symptoms are skin rashes, runny nose and itchy eyes that may persist or get progressively worse. Even in people who are susceptible, however, reactions generally take longer to develop (within 3–5 years) and may not develop for as long as 15 years (Baumann 1992). No therapy or desensitization exists for latex allergy; therefore, the only option is to avoid contact. A laboratory assessment of the antimicrobial effectiveness of glove washing and re-use in dental practice. Effectiveness of gloves in the prevention of hand carriage of vancomycin-resistant enterococcus species by health care workers after patient care. Handwashing and gloving, in Infection Prevention Guidelines for Family Planning Service Programs. Today, the most common occupational risk faced by healthcare personnel is contact with blood and body fluids during routine patient care. This exposure to pathogens increases their risk for serious infection and possible death. Health workers in some occupational settings, such as surgery and delivery rooms, have a higher risk of exposure to these pathogens than in all other departments combined (Gershon and Vlahov 1992; Gershon and Zirkin 1995). Because of this increasing risk, better infection prevention guidelines and practices are needed to protect staff working in these areas. Moreover, staff members who know how to protect themselves from blood and body fluid exposures and consistently use these measures will also help protect their patients. Moreover, even those that do perceive the risk do not regularly use protective equipment such as gloves, or other practices. Ongoing research has identified several psychosocial and organizational factors that may contribute to lack of compliance by healthcare staff. The most important of these are perceived to be: Infection Prevention Guidelines 5 1 Personal Protective Equipment and Drapes x poor safety conditions for staff working in hospitals and clinics, and x conflict of interest between providing the best patient care and protecting oneself from exposure (Gershon 1996). In fact, some common practices, such as having all staff in the operating room, not just the surgical team, wear masks, may increase costs while providing minimal, if any, protection to patients (Mitchell 1991). For example, surgical gowns and drapes have been shown to prevent wound infection only when dry. When wet, cloth acts as a wick or sponge to draw bacteria from skin or equipment up through the fabric that can then contaminate a surgical wound (Figure 5-1). What Is Personal Personal protective equipment includes: gloves, masks/respirators, eyewear Protective Equipment The most effective barriers, however, are made of treated fabrics or synthetic materials that do not allow water or other liquids (blood or body fluids) to penetrate them. These fluid-resistant materials are not, however, widely available because they are expensive. Lightweight cotton cloth 2 (with a thread count of 140/inch) is the material most commonly used for surgical clothing (masks, caps and gowns) and drapes in many countries. Unfortunately, lightweight cotton does not provide an effective barrier because moisture can pass through it easily, allowing contamination. Denims, canvas and heavy twill, on the other hand, are too dense for steam penetration. When fabric is used, it should be white or light in color in order to show dirt and contamination easily. Caps, masks or drapes made from paper should never be reused because there is no way to properly clean them. Types of Personal Protective Equipment Gloves protect hands from infectious materials and protect patients from microorganisms on staff members’ hands. They are the most important Remember: Wearing physical barrier for preventing the spread of infection, but they must be gloves does not replace changed between each patient contact to avoid cross-contamination. For handwashing or use of example, examination gloves should be worn when handling blood, body antiseptic handrubs. They are worn in an attempt to contain moisture droplets expelled as health workers or surgical staff speak, cough or sneeze, as well as to prevent accidental splashes of blood or other contaminated body fluids from entering the health workers’ nose or Infection Prevention Guidelines 5 3 Personal Protective Equipment and Drapes mouth. Unless the masks are made of fluid-resistant materials, however, they are not effective in preventing either very well.
Must arrive at Children’s Hospital Y Children’s Hospital – Biochemical blood before noon erectile dysfunction vacuum pump medicare best 60 mg levitra extra dosage. Division of Pre and Post Examination erectile dysfunction doctor in philadelphia purchase levitra extra dosage 40 mg visa, Page 180 of 286 Providence Health Care impotence natural cures discount levitra extra dosage 60mg with visa, Vancouver B erectile dysfunction pills in pakistan buy genuine levitra extra dosage on line. Ashkenazi Carrier Thalassemia: Screening No approval if Beta Thalassemia ordered by Brugada Syndrome Drs. Dystrophinopathies Division of Pre and Post Examination, Page 181 of 286 Providence Health Care, Vancouver B. N-acetyl galactosamine 6 Whole blood must arrive at C&W within 3 hrs of collection and prior sulphatase, Galactose 6 to 1200 hrs. If this is not possible, refer patient to C & W hospital sulphatase, Outpatient Laboratory for collection. Division of Pre and Post Examination, Page 184 of 286 Providence Health Care, Vancouver B. Division of Pre and Post Examination, Page 186 of 286 Providence Health Care, Vancouver B. Y Calgary Laboratory Services from no Provide collection date and 24 hour urine volume on req. Ensure Bill 73 is Y Specimen Process Center completed and copy of requisition for Sendout bench. Phone 403-220-4582 Division of Pre and Post Examination, Page 190 of 286 Providence Health Care, Vancouver B. Allow card Children’s Hospital to dry flat on level surface for at least 3 hours prior to packaging Neuronal Ceroid Lipofuscinocis, for shipment. Methyl-Tetrahydrofolate 604-875-2307 Transport specimen to Children’s Hospital via Dynamex Courier to ensure door to door delivery. Label tubes again with Harmony™ kit barcodes, covering Sunquest barcode but leaving patient demographics visible. Division of Pre and Post Examination, Page 193 of 286 Providence Health Care, Vancouver B. Division of Pre and Post Examination, Page 194 of 286 Providence Health Care, Vancouver B. Division of Pre and Post Examination, Page 195 of 286 Providence Health Care, Vancouver B. Division of Pre and Post Examination, Page 198 of 286 Providence Health Care, Vancouver B. Send Whole Blood in an insulated container to maintain ambient temperature during transport. All requests on patients over 16 years, must be approved by a Hematopathologist before testing. Y Provincial Toxicology Center Division of Pre and Post Examination, Page 199 of 286 Providence Health Care, Vancouver B. Division of Pre and Post Examination, Page 201 of 286 Providence Health Care, Vancouver B. Mon Fri stored and Freeze sample in container if collected outside of Special shipped at 2-8 C if Chemistry operating hours. Division of Pre and Post Examination, Page 203 of 286 Providence Health Care, Vancouver B. Division of Pre and Post Examination, Page 204 of 286 Providence Health Care, Vancouver B. Division of Pre and Post Examination, Page 205 of 286 Providence Health Care, Vancouver B. Division of Pre and Post Examination, Page 206 of 286 Providence Health Care, Vancouver B. Division of Pre and Post Examination, Page 208 of 286 Providence Health Care, Vancouver B. Spec should be collected prior to (Phenobarb, Mephobarbital) (serum acceptable) next dose. Division of Pre and Post Examination, Page 209 of 286 Providence Health Care, Vancouver B. Genetics Lab 3-4 hours fast or collect before the next feed for small babies or Room 2F22 children under 1 year. Ship entire remaining 604-875-2307 specimen frozen, do not split with other testing. Copy of requisition required for send out 604-875-2307 Division of Pre and Post Examination, Page 211 of 286 Providence Health Care, Vancouver B. Children’s Hospital Pyridoxine-Responsive Seizure Spin down within 1 hour of collection, freeze, send frozen. Refrigerate serum (or freeze) Specimen Process Center Antibody Response (Pre) stable for 21 days only. Refrigerate serum (or freeze) Specimen Process Center Antibody Response (Post stable for 21 days only. Ask patient to pay at Cashier and make 2 copies of payment receipt, one stapled with copy of requisition for Sendout Tech, the second stapled to original requisition. Send at room temp along with Y Children’s Hospital – Molecular whole blood completed Molecular Diagnostic Laboratory requisition. Division of Pre and Post Examination, Page 216 of 286 Providence Health Care, Vancouver B. Division of Pre and Post Examination, Page 217 of 286 Providence Health Care, Vancouver B. Division of Pre and Post Examination, Page 218 of 286 Providence Health Care, Vancouver B. Division of Pre and Post Examination, Page 219 of 286 Providence Health Care, Vancouver B. Copy of Y Provincial Toxicology Center Acetyl Procainamide) requisition for send out. Division of Pre and Post Examination, Page 221 of 286 Providence Health Care, Vancouver B. Division of Pre and Post Examination, Page 222 of 286 Providence Health Care, Vancouver B. Stable for 1 week Y Quest Diagnostics Nichols Institute Antigen Antibodies ambient, 2 weeks refrigerated. Division of Pre and Post Examination, Page 224 of 286 Providence Health Care, Vancouver B. Division of Pre and Post Examination, Page 225 of 286 Providence Health Care, Vancouver B. Yenson Division of Pre and Post Examination, Page 226 of 286 Providence Health Care, Vancouver B. Copy of Y Provincial Toxicology Center (Tricyclic Antidepressants) requisition for send out. Division of Pre and Post Examination, Page 229 of 286 Providence Health Care, Vancouver B. Mix 3 tubes 8 times by turning end over end or gently shake for 5 seconds, avoid frothing. Store plasma samples up to 1 week at 2 – 8°C or -20°C for extended storage (>1 week). Division of Pre and Post Examination, Page 230 of 286 Providence Health Care, Vancouver B. Physician needs to fill out Antibody, Allergy Specific IgE allergen specific IgE antibody form in the forms/req section: antibody). Specify posture at Tuesday time of collection: Supine = collect blood after one hour in the prone position. Order Entry: Must use Order Comment field to indicate Specimen Site and also add site information in Modifier field. Order Comment = Left renal or Right Renal Division of Pre and Post Examination, Page 233 of 286 Providence Health Care, Vancouver B. Tuesday ice Collect after the patient has been awake ambulating and/or seated in upright posture. Copy of requisition Laboratory 3rd – Fl 600 Multiple Endocrine Neoplasia th for send out.
Laser therapy is no longer used because of its high cost and the poor portability of equipment young and have erectile dysfunction 40mg levitra extra dosage with amex. They can be afxed to erectile dysfunction hand pump 60mg levitra extra dosage with mastercard bleeding sites and typically slough off days to erectile dysfunction age onset buy levitra extra dosage 60 mg mastercard weeks after placement erectile dysfunction treatment dublin generic levitra extra dosage 40 mg on-line. Management following endoscopy Although routine second-look endoscopy is not recommended (Barkun et al. There are no convincing data to support the use of H2 receptor antagonists (Palmer, 2002). Surgery Patients who continue to actively bleed after endoscopy require urgent surgery. Early surgical consultation in patients at high risk of rebleeding and for those who rebleed after endoscopic therapy is indicated. Timing of an operation should, if possible, avoid the hours between mid night and 7 a. The indications for surgery in patients with bleeding peptic ulcers are: severe life-threatening haemorrhage not responsive to resuscitation; failure of medical therapy and endoscopic haemostasis with persistent recurrent bleeding; coexisting indication for surgery, such as perforation, obstruction or malignancy; prolonged bleeding with loss of 50 per cent of blood volume; second hospitalisation for peptic ulcer bleeding. A bleeding duodenal ulcer should be under-run with specic ligation of the gastroduodenal and right gastroepiloic arteries. Vagotomy with antrectomy is reserved for patients who rebleed after simple under-running of the duodenal ulcer and for those with other ulcer complications such as gas tric outlet obstruction. Highly selective vagotomy with anatomical closure of the duodeno stomy or the pyloroduodenostomy in order to preserve the normal pyloric sphincter muscle is an operation reserved for young, stable, low-risk patients with a low risk of recurrent ulcer rate (< 10% at a mean follow-up of 3. The surgical management of bleeding gastric ulcer is slightly different and should exclude malignancy as well as control and prevent recurrent bleeding or ulceration. Alternative options include wedge resection of the ulcer with or without truncal vagotomy and drainage procedure. The type of operative approach relies on the location of the ulcer and the patient’s tness and haemodynamic stability. Ulcer biopsy and oversewing, thus leaving the ulcer in situ, carries a high risk of rebleeding (20–40%) (Corson and Williamson, 2001) but may be jus tied in high-risk patients who cannot withstand resection. Arterial embolisation this is an effective option to control massive bleeding from peptic ulcers in patients with failed endoscopic therapy and in poor surgical candidates. Management of other causes of non-variceal upper gastrointestinal bleeding 157 Follow-up Test for and eradicate Helicobacter pylori in order to prevent rebleeding (Barkun et al. It is critical to distinguish Mallory–Weiss tear from Boerhaave syndrome, which represents a full-thickness laceration with perforation of the oesophagus. If bleeding from a Mallory–Weiss tear is visualised at endoscopy, then electrocoagulation, heater-probe application and sclerotherapy are viable options. The overall mortality rate of patients who require emergency surgery is 15– 25 per cent, in contrast to less than 3 per cent in those whose bleeding stops by the time of ini tial endoscopy. Endoscopi cally, the lesion appears as a large submucosal vessel that has become ulcerated; the bleeding can be massive and brisk. Endoscopic management options include contact thermal ablation with heater probe (with or without prior injection with adrenaline) as rst choice, band ligation and sclerotherapy. Rebleeding after endoscopic therapy occurs in 15 per cent of patients and can be managed in most cases by repeated endoscopy with suture ligation or, more preferably, surgical excision of the lesion reserved for endoscopic failures. Histologically, angiodysplasias are dilated, thin-walled vascular channels that appear macroscopically as a cluster of cherry spots. Angiodysplasia can be acquired or con genital, as in hereditary haemorrhagic telangiectasia and Rendu–Osler–Weber syndrome (an autosomal dominant disorder typically identied by the triad of telangiectasia, recurrent epis taxis and a positive family history). Most lesions are smaller than 1 cm in diameter; they are multiple in two-thirds of patients. These lesions may be readily eradicated endoscopically with contact heater probes, argon plasma coagulation, or band ligation with surgery reserved for endoscopic failure. When the diagnosis is unknown and a vascular lesion is suggested, combined hormonal ther apy with oestrogen and progesterone may be benecial. Aortoenteric stula An aortoenteric stula results from the erosion of the aortic graft into the bowel lumen, usually at the third or fourth part of the duodenum. Patients usually present with self-limiting sentinel bleeding followed by exsanguinating massive gastrointestinal bleed. Emergency surgery to remove the aortic graft and debride and close the duodenum and the aorta, followed by bilateral extra-anatomic vascular bypass. Alternatively, an endovascular stent to repair the stula with prolonged antibiotic therapy (for at least 3 months) may be considered as a bridge to more denitive treatment after haemodynamic stabilisation in high-risk surgical patients. An episode of bleeding is considered signicant when there is a transfusion requirement of 2 units of blood or more within 24 h of time zero, together with a systolic blood pressure of less than 100 mmHg or a postural change of more than 20 mmHg and/or pulse greater than 100 beats/min at time zero. Variceal rebleeding is dened as the occurrence of new Management of patients with variceal upper gastrointestinal bleeding 159 haematemesis or melaena after a period of 24 h or more from the 24-h point of stable vital signs and haematocrit/haemoglobin. All bleeding episodes regardless of severity should be counted in evaluating rebleeding. The denition of failure to control active bleeding can be divided into two time frames: Failure to control bleeding within 6 h: this is represented by a transfusion requirement of 4 units of blood or more and inability to achieve an increase in systolic blood pressure by 20 mmHg or to 70 mmHg or more, and/or inability to achieve a pulse rate reduction to less than 100 beats/min or a reduction of 20 beats/min from baseline pulse rate. Development of varices the rise in portal pressure is associated with the development of collateral circulation that allows the portal blood to be diverted into the systemic circulation. These spontaneous shunts occur: at the cardia through the intrinsic and extrinsic gastro-oesophageal veins; in the anal canal where the superior haemorrhoidal vein belonging to the portal system anasto moses with the middle and inferior haemorrhoidal veins that belong to the caval system; in the falciform ligament of the liver through the para-umbilical veins, which are the remains of the umbilical circulation in the fetus; in the abdominal wall and the retroperitoneal tissues, from the liver to the diaphragm, veins in the lienorenal ligament, in the omentum and lumbar veins; as blood diversion from the diaphragm, gastric, pancreatic, splenic and adrenal veins, which may drain into the left renal vein. The two factors that appear to determine the development of varices are continued hepatic injury and the degree of portosystemic shunting. The factors that predispose to and precipitate variceal haemorrhage are still not clear. Cur rently the following are the most important factors: Portal pressure: usually reects the intravariceal pressure. The literature varies in its scoring of the rel evance of this point, due largely to the lack of clear denition regarding the distinction between large and small varices. These features represent changes in variceal wall structure and tension associated with the development of micro-telangiectasias. The two most important factors that determine the risk of variceal bleeding are the severity of liver disease and the size of the varices. The average mortality rate of the rst episode of variceal bleeding is around 50 per cent. The average mortality from a subsequent variceal haemorrhage is 5 per cent in Child class A patients, 25 per cent in Child class B patients and 50 per cent in Child class C patients. Control of active variceal bleeding the following summarises the management recommendations for control of active variceal bleeding in patients with cirrhosis: Treatment should ideally be undertaken by a dedicated appropriately equipped and staffed unit. Avoid dextrans (may increase bleeding times), hydroxyethyl starch (can worsen liver function) and Ringer’s lactate solution. Intravenous octreotide, a synthetic analogue of somatostatin, is often begun as soon as the diagnosis is certain. Vasopressin’s mechanism of action is thought to be splanchnic arteriolar vasoconstriction, resulting in decreased portal pressure, although it remains controversial whether this effect is maintained in the face of severe haemorrhage. The potential side effects of vasopressin are primarily cardiovascular and increase with higher doses. Sublingual nitroglycerine administered simultaneously with vasopressin sig nicantly decreases the complication rate of vasopressin. The control of bleeding with this com bination therapy is superior to that achieved with vasopressin alone. An alternative to vasopressin for control of variceal haemorrhage is the synthetic analogue terlipressin (1–2 mg, depending on body weight, given by bolus every 4 h for 2–5 days); this is more effective than vasopressin. The most commonly used drug for treating variceal bleeding is somatostatin (an ini tial bolus of 250 g followed by intravenous infusion at a rate of 250 g/h for 2–5 days). Although concerns over potential effects on renal function have been raised, octreotide (continuous intravenous infusion of 25 g/h for 2–5 days) is a widely used alternative to vasopressin and nitroglycerine because of the simplicity of single-agent use. Failing that, endo scopic intravariceal or paravariceal injection sclerotherapy should be performed. Its risks include pulmonary embolisation, portal vein embolisation, splenic infarction, and permanent damage to the lens of the endoscope. Management of patients with variceal upper gastrointestinal bleeding 161 In clinical practice, the choice of sclerosant has largely remained a matter of personal pref erence and has depended on the availability of the particular sclerosants in various countries.
He she was found to encore vacuum pump erectile dysfunction purchase 60mg levitra extra dosage fast delivery have a rigid abdomen ayurvedic treatment erectile dysfunction kerala best order for levitra extra dosage, with visible 2 2 3 was placed into an observation bed overnight with sub-diaphragmatic gas on chest Xray erectile dysfunction prostate order levitra extra dosage master card. She was a diagnosis of alcohol intoxication but later became cardiovascularly unstable and her admission bloods + + tachypnoeic and hypotensive erectile dysfunction drugs that cause discount levitra extra dosage online. L-1) and blood 2 2 3 gas analysis showed: • What is the cause of his deterioration Blood analysis confrmed normal 3 biochemistry and arterial gas analysis showed pH • Interpret these results. Consultant Anaesthetist An elderly lady was admitted from a care home Royal Devon and Exeter with a one week history of severe diarrhoea. It is the negative logarithm of the H+ concentration, so when 10 the blood pH is normal (7. A base is a substance that has the ability to accept a proton and has a high pH in solution. Metabolic acidosis (a low pH in the tissue) exists when there is an excess level of fxed or exogenous acids in the body. Fixed acids include hydrochloric acid, sulphuric acid, phosphoric acid, ketoacids and lactic acid. Metabolic acidosis is accompanied by a drop in plasma bicarbonate concentration (relative to the bicarbonate concentration present prior to the onset of the acidosis). This drop in bicarbonate can either be caused by bicarbonate loss or by the presence of extra acid. The primary bufer in the blood is bicarbonate, which combines with excess acid (hydrogen ions) to make carbon dioxide, which decreases the efect of the acid on the blood pH. Bufering means that metabolic acidosis (a low tissue pH) does not always lead to the presence of metabolic acidaemia (a low blood pH). Blood pH only falls appreciably when the bufering capacity of the blood becomes overwhelmed. To classify metabolic acidosis it is useful to calculate the anion gap and, if present, the size of the osmolar gap. When examining the cause of a metabolic acidosis it is useful to calculate the anion gap. L -1 3 A normal anion gap implies that an acidosis is due to primary bicarbonate loss: • Plasma bicarbonate is low (the hallmark of acidosis) and chloride concentration is raised. An increased anion gap implies that fxed acids are being retained or an abnormal organic acid is present. Similarly the osmolar gap is not sensitive in ethylene glycol poisoning as the large molecular weight of this substance determines • Fixed acids may be retained in: the mortality, only causing a small rise in osmolar gap. When treating critically ill patients with metabolic acidosis, it is important to consider the adequacy of their ventilatory response to • If fxed acids are normal, exogenous acids should be considered: acidosis when deciding on treatment priorities. Bufering provides salicylate (aspirin) poisoning the main means of accommodating a metabolic acidosis. L-1 which rapid onset acidosis (for example during convulsions) tends not to means it is possible for a patient with a normal anion gap of 12 to stimulate respiration in spite of a low blood pH. L-1) Even though respiratory compensation occurs relatively quickly, it without generating an anion gap outside the normal range. This maximal gap is also afected by plasma albumin (an important unmeasured capacity can be calculated: anion) and low albumin levels can signifcantly ofset an anticipated rise in anion gap. It is a useful calculation to perform if alcohol poisoning is or the patient has a superimposed respiratory acidosis. Osmolality is measured in the laboratory with an osmometer that When providing respiratory support in patients with a metabolic either assesses the depression of a sample’s freezing point or the acidosis it is important to remember that respiratory compensation depression of its vapour pressure. Young ft patients with severe diabetic ketoacidosis can generate huge minute volumes (20-30 l. Consider the following arterial gas: of osmotically active particles is dissolved in a kilogram or a litre of solvent respectively. L presentation: of each other (the diference being created by the inaccuracy of the calculation and the inaccuracy of the osmometer) and if the gap is • If the gas sample was taken from a young unconscious patient, larger it suggests the presence of unmeasured osmotically active species. This highlights the importance of basing gas interpretation on clinical assessment. Other pitfalls arise from failing to recognise the limitations The main causes of ketoacidosis include: of the anion gap and osmolar gap. It is produced from pyruvate, the end substrate in Starvation ketoacidosis glycolysis, the process by which carbohydrates are broken down this occurs when glycogen levels in the liver have become exhausted to produce energy. Since some tissues (such as skin) produce more and the liver attempts to make more glucose via the gluconeogenesis pyruvate than their mitochondria can handle, excess pyruvate is pathway. The excess acetyl coA is converted A rise in the lactate level in the blood suggests increased lactate into ketone bodies and ketoacidosis develops. As the liver’s capacity to within bufering capacity and the anion gap rise is small. The situation metabolise lactate is large, a rise in blood lactate levels suggests that a is resolved by supplying glucose in a controlled fashion and allowing degree of impaired liver lactate handling is present; however, increased the liver to revert back to the usual metabolic pathways. Lactic acidosis is categorised according to the alcoholic ketoacidosis state of oxygen delivery. This condition develops when ethanol is taken without enough If oxygen delivery is inadequate (type A lactic acidosis), then aerobic calories. The starvation response is now complicated by the liver’s efort metabolism is impaired, pyruvate accumulates and lactate is produced. This exacerbates the glucose defciency and the enough to create a lactic acidosis in isolation – the haemoglobin would corresponding drop in insulin levels stimulates lipid metabolism and need to be less than 5g. Analysis of the acid-base balance can be (this is one situation where the low transfusion threshold of 7g. Causes of type B acidosis are subdivided as follows: Treatment involves restoration of adequate circulating volume and the administration of both insulin and glucose. With prompt treatment B1 Underlying disease, also called ‘stress lactate’ (ketoacidosis, the acidosis should resolve rapidly. The insulin defcit reduces available intracellular glucose Treatment in this situation depends on determining the cause from and increases fat breakdown and free fatty acid levels. The liver the history and clinical signs and addressing the root cause, rather responds, as if in a starving state, by increasing lipid metabolism than attempting to correct the acidosis directly. Acetoacetic acid and Ketone bodies include -hydroxybutyrate, acetoacetate and acetone. However, as the proportion are often severely dehydrated and this can cause lactic acidosis due of bicarbonate fltered by the kidney is proportional to the plasma to inadequate tissue perfusion. The condition tends to be self-limiting and the bicarbonate represent the severity of the acidosis. It is useful to categorise these conditions Both acid and potassium secretion are reduced and the urine remains according to their efect on glomerular fltration. The most common forms of renal acidosis seen in intensive care are associated with a profound drop in glomerular fltration. Acute other causes of normal anion gap acidosis kidney injury (commonly due to acute tubular necrosis), and acute exacerbation of chronic kidney disease, both cause a metabolic acidosis Normal anion gap acidosis occurs due to primary bicarbonate loss because the kidney is unable to excrete fxed acids. The latter causes levels drop and chloride tends to remain stable and as a result the anion a problematic acidosis that responds poorly to dietary supplements gap rises. Treatment involves correction of the precipitating factors and and can be difcult to treat. Gut losses occur with severe diarrhoea or via nasogastric aspirates in patients with small bowel obstruction. While the glomerular fltration rate may Metabolic acidoSiS due to eXoGenouS acidS be depressed, the acidosis is disproportionate to this minor reduction and tends to exhibit a normal anion gap. Specialist laboratories are Type 1 Distal tubular defect able to measure plasma alcohols but this is often not immediately Type 2 Proximal tubular defect available, therefore the diagnosis of alcohol poisoning can be helped by estimation of the osmolar gap. In order to understand the patterns Type 4 Distal tubular resistance to aldosterone (or seen in alcohol poisoning it is necessary to discuss how the various aldosterone defciency) alcohols are metabolised. A metabolic acidosis develops as a consequence Ethanol, methanol and ethylene glycol are metabolised by the same and the urine fails to acidify. Potassium excretion is unafected enzyme systems, but produce diferent metabolites. The underlying disorder weak acids that dissociate into electrically charged ions that become should be addressed and the episodes of acidosis prevented by giving balanced by sodium, and so cease to exert an osmotic infuence.
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