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Query: UMLS:C0028754 (obesity)
 124,988 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The most serious adverse effect of standard intestinal bypass for obesity is the high incidence of hepatic dysfunction and death from hepatic failure. We therefore examined the long-term effects of a modified form of jejunoileal bypass (in which a greater continuous length of ileum is retained), on liver function in 120 patients. Substantial weight loss (119-0+/-SD 23-3 kg to 82-3+/-18-8 kg) occurred during the first nine months after surgery, accompanied by a significant rise in serum concentrations of bilirubin, alanine transferase, and alkaline phosphatase, and a significant reduction in albumin concentrations. Biochemical changes were unrelated to weight loss or halothane anaesthesia. After weight stabilisation liver function reverted to normal, and four years after bypass sulphobromophthalein retention and hepatic histology did not differ from those in obese controls. There were two postoperative deaths. Three other patients died during the period of rapid weight loss with severe hepatic steatosis. While transient mild impairment of liver function is common after modified jejunoileal bypass, clinically significant hepatic dysfunction is a rare and unexplained early complication.
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PMID:Hepatic structure and function after modified jejunoileal bypass surgery for obesity. 91 71

The method and results of applying ultrasonic aerosols in 485 patients, operated upon on abdominal organs, are presented. Ultrasonic aerosols were included in the complex of prophylactic and therapeutic measures in the postoperative period. Prophylactic measures were started immediately after patient's being returned from the operating room. Special attention was given to patients in whom ventilatory disturbances developed during anesthesia, to patients with obesity, chronic bronchitis, emphysema, pneumosclerosis and also those, who negated the rationality of prophylactic measures. The use of finely dispersed aerosols after the method suggested by the authors allowed a 6 times reduction in the incidence of pulmonary complications and more than twice shortening of the postoperative pneumonia course.
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PMID:[Prevention and treatment of postoperative broncho-pulmonary complications with ultrasonic aerosols]. 96 Apr 62

Sixteen extremely obese patients were anaesthetized for intestinal short circuiting operations. Severe obesity may cause pathological cardio-pulmonary changes. Cardiovascular alterations include increased systemic, pulmonary artery and pulmonary capillary venous pressure. Cardiac output, total blood volume and left ventricular work increase. Expiratory reserve volume and consequently functional residual capacity decrease with gross obesity. Functional residual capacity falls below closing volume and inspired gas may be distributed to non-dependent lung zones, resulting in decreased ventilation/perfusion ratios and arterial hypoxaemia. Low total respiratory compliance increases the oxygen cost of the work of breathing. Obesity may change the dose requirements for regional anaesthesia and long-acting muscle relaxants. General anaesthesia may also reduce functional residual capacity. We used a technique of anaesthesia which consisted of epidural analgesia with intra-operative mechanical ventilation and which specifically avoided volatile inhalation agents and long-acting muscle relaxants. All patients were extubated immediately after operation and returned to the recovery room for an average duration of 26 hours. Post-operative treatment included humidified oxygen, chest physiotherapy and elevation of the head of the bed to 45 degrees. Each patient's respiratory progress was monitored by repeated determinations of arterial blood gases and vital capacity and by serial chest X-rays. None of the patients in this group required post-operative tracheal intubation and mechanical ventilation.
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PMID:Anaesthesia for intestinal short circuiting in the morbidly obese with reference to the pathophysiology of gross obesity. 113 75

Twenty-six patients are described who had otherwise unexplained hepatitis after halothane anaesthesia. Twenty-four (92 per cent) had multiple exposures, and 11 (42 per cent) died. In eight patients a characteristic pattern of delayed postoperative pyrexia has been found. Obesity was common, but the clinical features and complications were those of any severe hepatitis. Obesity, early onset of jaundice after anaesthesia, and low thrombotest, were associated with a fatal outcome. None of those who were followed up after recovery developed clinical or biochemical evidence of chronic liver disease. The differential diagnosis of postoperative jaundice is discussed, and it is shown that halothane patients with hepatic encephalopathy are significantly older (25.4 plus or minus 11.6 years) than those referred to this unit with viral hepatitis of equal severity (34.1 plus or minus 16.4 years). Unexplained jaundice or delayed pyrexia after a previous administration of halothane should be a contraindication to its further use.
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PMID:Halothane-related hepatitis. A clinical study of twenty-six cases. 115 92

Experience with 88 obese pateints undergoing jejunoileal shunt is reviewed, with emphasis on preoperative preparation and assessment, conduct of anesthesia, postoperative care, and anesthesia-related complications. There was no intraoperative mortality, and postoperative morbidity was minimal. The operation can be viewed as a short-term answer to the malignancy of massive obesity, since physiologic abnormalities are reversible; however, only hospitals that can provide full surgical, medical, endocrinologic, and anesthesia services, backed by modern ancillary investigative ability, should perform this operation.
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PMID:Anesthesia for jejunoileal shunt: review of 88 cases. 116 63

The authors have studied the response of the cardiovascular system and kinetics of some indices of fat and carbohydrate metabolism during the operation under different kinds of anesthesia in 175 patients with obesity. A comparative estimation of local anesthesia and narcosis with ether, fluothane, ntirogen monoxide during operative procedures in obese patients is given. It is believed that in patients with obesity for short-time operative procedures it is rational to use fluothane-nitrogen monoxide-oxygen anesthesia.
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PMID:[Effect of different types of anesthesia on hemodynamics and certain indicators of metabolism in obesity]. 120 71

In the course of a sterilization by tubal electrocoagulation, the patient suffered perforation of the abdominal aorta, causing a large hematoma and danger of bleeding to death. The aorta was repaired with a Teflon patch and the patient recovered, but the potentially fatal incident occasioned a review of the legal status of sterilization and of its complications. In the Dohrn case (1964), the Federal Court of Justice determined that voluntary sterilization is nonpunishable under German law. However, sterilization has increased less in Germany than, e.g., in England or Japan, and in 1969 the German Doctors' Conference declared sterilization permissible only for medical, genetic-eugenic, or pressing social reasons. As for complications, electrocoagulation of the tubes - involving anesthesia, inhibition of respiration by means of Trendelenburg's position, introduction of carbon dioxide into the abdomen, and manipulation of instruments through incisions - must be considered a complex procedure. Among 11,956 published cases described by 29 authors between 1969-1974, the complication rate was 1.71%; probably the actual rate is higher. 3 fatalities - from heart failure, peritonitis, and suffocation - were reported. In addition, there were 117 hemorrhages (.98% of the cases reported), 22 burns or mechanical injuries of the gastrointestinal tract (.19%), 26 perforations of the uterus (.22%), 44 infections (.37%), 25 skin burns (.21%), and 24 cases of skin or organ emphysema (.2%). Mechanical injuries carry the danger of perforation of organs over time, and the injuries reported included 13 perforations of colon, ileum, or stomach, requiring laparotomy and excision. Complications under electrocoagulation are reported to be less severe than in conventional operations; nevertheless, electrocoagulation should never be performed as an outpatient operation, and follow-up to check for delayed complications is advisable. Contraindications are poor general health, severely reduced respiration, and such conditions as anatomical anomalies, tumors, endometriosis, and obesity.
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PMID:[Aortic perforation following electrocoagulation of the tubes]. 126 30

Full clinical and laboratory details of 203 patients with postoperative jaundice were submitted to a panel of hepatologists. All patients whose jaundice may have had an identifiable cause were excluded, which left 76 patients with unexplained hepatitis following halothane anaesthesia (UHFH). Hepatitis in 95% of these cases followed multiple exposure to halothane, with repeated exposure within four weeks in 55% of cases. Twenty-nine patients were obese, 52 were aged 41-70, and 53 were women. Thirteen patients died in acute hepatic failure. Rapid onset of jaundice after anaesthesia, male sex, and obesity in either sex were poor prognostic signs. Of the clinical stigmata of hypersensitivity, only eosinophilia was impressive. The UHFH group had a much greater incidence of liver kidney microsomal (LKM) and thyroid antibodies and autoimmune complement fixation than those patients whose jaundice related to identifiable factors. Thirteen of the 19 patients with LKM antibodies also had thyroid antibodies. In six patients retested two to three years later LKM antibodies had disappeared, although thyroid antibodies persisted. Rapidly repeated exposure to halothane may cause hepatitis, but such a complication is probably rare. Possibly obese women with a tendency to organ-specific autoimmunity may be more at risk. Nevertheless, the comparative risks of rapidly repeated halothane or non-halothane anaesthesia cannot be determined from the present data. If alternative satisfactory agents are available halothane should be avoided in patients with unexplained hepatitis after previous exposure, although in three to five patients with UHFH who were re-exposed to halothane jaundice did not recur.
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PMID:Unexplained hepatitis following halothane. 126 12

The effect of obesity on the disposition and action of vecuronium was studied in 14 surgical patients. After induction of anesthesia with thiopental and maintenance of anesthesia by inhalation of nitrous oxide and halothane, seven obese patients (93.4 +/- 13.9 kg, 166% +/- 30% of ideal body weight, mean +/- SD) and seven control patients (60.9 +/- 12.3 kg, 93% +/- 6% of ideal body weight) received 0.1 mg/kg of vecuronium. Plasma arterial concentrations of muscle relaxant were determined at 1, 3, 5, 10, 15, 20, 30, 45, 60, 90, 120, 150, 180, 210, 240, 300, and 360 min by a spectrofluorometric method. Simultaneously, neuromuscular blockade was assessed by stimulation of the ulnar nerve and quantification of thumb adductor response. Times to 50% recovery of twitch were longer in the obese than in the control patients (75 +/- 8 versus 46 +/- 8 min) as were 5%-25% recovery times (14.9 +/- 4.0 versus 10.0 +/- 1.7 min) and 25%-75% recovery times (38.4 +/- 13.8 versus 16.7 +/- 10.3 min). However, vecuronium pharmacokinetics were similar for both groups. When the data were calculated on the basis of ideal body weight (IBW) for obese and control patients, total volume of distribution (791 +/- 303 versus 919 +/- 360 mL/kg IBW), plasma clearance (4.65 +/- 0.89 versus 5.02 +/- 1.13 mL.min-1.kg IBW-1), and elimination half-life (119 +/- 43 versus 133 +/- 57 min) were not different between groups.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:Pharmacokinetics and pharmacodynamics of vecuronium in the obese surgical patient. 134 66

The nonlinear mixed-effects modeling (NONMEM) computer program was used to investigate the variability in the duration of doxacurium-induced neuromuscular block in 408 patients enrolled in phase II and phase III clinical trials of doxacurium. Spontaneous recovery data in the 10% to 90% block range from all patients were pooled and fitted to a linear model. Two parameters were estimated: (1) the slope, which is related to the pharmacokinetics and to the steepness of the dose-response curve, and (2) the intercept, which is linearly related to dose but has no physiologic meaning. The primary goal was to determine the factors affecting the slope by use of univariate and multivariate analyses techniques. Estimates of the slope ranged from 0.67% to 1.1% block/min (interindividual variability, 39%). Factors with clinically significant effects on the slope included the following: age, obesity, and anesthesia type. Thus these factors influence the time course of doxacurium-induced block and may require individualization of dose.
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PMID:Population pharmacodynamics of doxacurium. 142 27


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