Development of cellular and humoral immunity in the respiratory tract of rabbits to Pseudomonas lipopolysaccharide.

Immunization with Pseudomonas lipopolysaccharide induced both cellular and humoral immunity in rabbits, particularly in the respiratory tract after intranasal immunization. Either parenteral (i.m.) or intranasal immunization elicited an IgG antibody response in respiratory secretions, but only intranasal immunization produced secretory IgA antibody. Immunization by both routes stimulated serum IgM and IgG agglutinative antibodies. Because both methods of immunization produced skin test reactivity which had components of both Arthus and tuberculin-like reactions, cellular immunity was more readily assessed by the measurement of migration inhibitory factor (MIF) released from immune lymphocytes in respiratory and spleen cell suspensions after challenge with the lipopolysaccharide antigen. After intranasal vaccination, MIF activity was detected in the respiratory tract by direct assay; in contrast, i.m. immunized rabbits did not produce respiratory MIF. Both modes of immunization resulted in splenic MIF activity. However, lymphocytes were only capable of producing MIF for short periods after primary immunization had ended, apparently losing this function in about 2-3 wk. Therefore, it was concluded that cellular immunity by in vitro assay was transient after primary immunization with this Pseudomonas antigen in contrast to the more persistent humoral immunity. The biological significance of immune lymphocytes as part of the coordinated host defense of the lung needs further evaluation.

Duodenal ulcer perforation: the effect of H2 antagonists?

One hundred and two patients with perforated duodenal ulcers over a 13 year period (1970 to 1982) have been prospectively followed-up at a special gastric clinic. Of the 37 patients with perforation of their acute ulcer, 34 were treated by oversew and three had an initial definitive operation (vagotomy and drainage). The remaining 65 patients presented with perforation of a chronic ulcer and 54 were treated by oversew and 11 underwent definitive surgery--nine had vagotomy and drainage and two had partial gastrectomies. Seven of the 34 patients (20.5%) with acute ulcer perforation treated by simple oversew subsequently required definitive ulcer surgery at a mean 17.5 months after perforation and 31 of the 54 patients (57.4%) with chronic ulcer perforations required definitive surgery at a mean 27.4 months after perforation. The introduction of H2 antagonists in 1977 did not alter the re-operation rate in patients with chronic ulcer perforation managed by oversew. Results of this study provide further evidence in favour of treating patients with perforation of their chronic duodenal ulcer by definitive surgery whenever possible.

Are current techniques of inguinal hernia repair optimal? A survey in the United Kingdom.

Data was collected on the techniques currently employed in adult inguinal hernia repair by means of a postal questionnaire to consultants in four Regional Health Authorities in England. Questionnaires were returned by 240 consultants (85%). This identified a considerable range in methods of repair, with a Moloney nylon darn being the sole method used by 35% of consultants, and the Shouldice technique, either alone or in combination with other methods, being used by 20%. Overall, 51% employ a subcuticular suture for skin closure, and traditional skin sutures are used by 31%. There was no association between consultant's date of qualification or subspecialty and type of repair. Consultants qualifying after 1969 are most likely to use a subcuticular suture. Some 14% of all consultants and 19% of those qualifying since 1969 employ a Shouldice procedure and a subcuticular suture.

Minimum standards for the management of cleft lip and palate: efforts to close the audit loop. Royal College of Surgeons of England.

Intercentre audit in the late 1980s revealed poorer outcomes for facial growth for British patients with cleft lip and palate than equivalent patients in northern Europe. A subsequent survey of the surgical practices in England and Wales, under the auspices of the Surgical Audit and Epidemiology Unit, revealed the widespread involvement of low-volume operators in cleft care, a tendency for low-volume operators to have an incomplete network of associated professionals, and non-standardised record keeping protocols. Recommendations for minimum standards of care for children born with cleft lip and palate were produced by a multidisciplinary steering group. A further investigation is planned to determine their validity and to provide a baseline for future audit cycles.

Surgical glove failure rate.

Surgical gloves were collected after day-time operations for a 4-week period. Glove punctures were located by inflating each glove with compressed air and immersing the inflated glove in water. During the period of the study 681 surgical operations were performed. A total of 3790 gloves was collected, 334 gloves (8.8%) had perforations at the end of the surgical procedure. Defects occurred in one or more gloves in 32.0% of all operations.

Surgical operation rates: a twelve year experience in Stockton on Tees.

A review of twelve years surgical practice in a district in the North East of England is presented. During this period 63 562 surgical operations were undertaken. Analyses of these operations show that the amount of elective general surgery undertaken has almost doubled and the rate of emergency general surgery has remained remarkably constant. There has been a significant increase in the number of gallbladder, varicose vein and minor general surgical procedures performed. There has also been a significant increase in urological surgery and in orthopaedic surgery which has doubled over the study period.

Groin hernia surgery: a systematic review.

BACKGROUND: An extensive volume of clinical research has been undertaken on the use of surgery for groin hernias. For many years there has been a large number of different methods of repairing hernias and, with the introduction of laparoscopic surgery, this has increased further. It is uncertain which method is the best in terms of safety and effectiveness. OBJECTIVES: This review was undertaken to compare the outcomes following different surgical procedures to treat groin hernias in adults. It sought answers to six questions: 1)Which method of surgery (including open procedures and laparoscopic surgery) is the safest and most effective for inguinal hernia repair? 2) Is local anaesthesia a safe and effective alternative to general anaesthesia? 3) Is there a difference in outcome between specialist and non-specialist surgeons? 4) Is day-case as safe and effective as inpatient surgery? 5) Is synchronous bilateral hernia repair as safe and effective as delayed repair? 6) Which method of surgery is the safest and most effective for femoral hernia repair? METHODS: The primary measure of effectiveness used was the proportion of hernia repairs in which there was a recurrence. Secondary outcome measures included complications, post-operative pain, wound infection, time to return to normal activities and/or return to work. A systematic search of the literature (up to February 1996) was undertaken using a variety of approaches. the methodological quality of all prospective comparative studies (45 randomised trials and 26 non-randomised trials/prospective cohort studies) was assessed using a standard checklist. RESULTS: Some of the variation in findings from different studies is likely to be due to methodological differences rather than differences in the effectiveness of the surgical procedures. The main methodological shortcomings of the studies that have been performed are: lack of agreed method for assessing severity of hernias; failure to take confounding into account in non-randomised studies; variation in length of follow-up; poor external validity; lack of objective measures of outcome; and inadequate statistical power. These problems severely limit the conclusions that can be drawn from the literature.

Temporary loop ileostomy.

A refinement of the technique for constructing the temporary loop ileostomy using a subcutaneous absorbable bridge is described. This leaves the skin surface uncluttered and allows immediate fitting of a watertight appliance. Clinical experience in 22 patients confirms that this is a safe, simple defunctioning stoma with few complications and in our practice has also replaced the loop colostomy as the covering stoma for difficult colorectal anastomoses.

Incidence of and mortality from acute upper gastrointestinal haemorrhage in the United Kingdom. Steering Committee and members of the National Audit of Acute Upper Gastrointestinal Haemorrhage.

OBJECTIVE: To describe the current epidemiology of acute upper gastrointestinal haemorrhage. DESIGN: Population based, unselected, multicentre, prospective survey. SETTING: 74 hospitals receiving emergency admissions in four health regions in the United Kingdom. SUBJECTS: 4185 cases of acute upper gastrointestinal haemorrhage in which patients were aged over 16 years identified over four months. OUTCOME MEASURES: Incidence and mortality. RESULTS: The overall incidence of acute upper gastrointestinal haemorrhage in the United Kingdom is 103/100,000 adults per year. The incidence rises from 23 in those aged under 30 to 485 in those aged over 75. At all ages incidence in men was more than double that in women except in elderly patients. 14% of the haemorrhages occurred in inpatients already in hospital for some other reason. In 27% of cases (37% female, 19% male) patients were aged over 80. Overall mortality was 14% (11% in emergency admissions and 33% in haemorrhage in inpatients). In the emergency admissions, 65% of deaths in those aged under 80 were associated with malignancy or organ failure at presentation. Mortality for patients under 60 in the absence of malignancy or organ failure at presentation was 0.8%. CONCLUSIONS: The incidence of acute upper gastrointestinal haemorrhage is twice that previously reported in England and similar to that reported in Scotland. The incidence increases appreciably with age. Although the proportion of elderly patients continues to rise and mortality increases steeply with age, age standardised mortality is lower than in earlier studies. Deaths occurred almost exclusively in very old patients or those with severe comorbidity.