We reviewed our experience with same hospitalization resection in the treatment of acute diverticulitis (AD) and compared outcomes with patients admitted for elective resection. From January 1987 through December 1996, 20 patients (Group 1) were admitted with AD and were operated on during the same hospital admission. During that same time period, 22 patients (Group 2) were admitted for elective resection and found to have an abscess intraoperatively. Thirty patients had elective resection with no abscess found (Group 3), and 10 patients were found to have a fistula to adjacent structures during elective resection (Group 4). Demographics and type of procedure done were similar in all groups. Fifteen patients (75%) in Group 1 had an abscess; eight were pericolic, and seven were pelvic. In contrast, all Group 2 abscesses were pericolic (P < 0.001). There was no mortality or major morbidity in any group. Patients in Groups 1 and 4 had higher fluid requirements (not significant), estimated blood loss (P < 0.01), and longer operative times (P < 0.05) when compared with the other groups. Postoperative and total hospital stay was significantly longer in Group 1. We conclude that hospitalized patients with AD who meet indications for surgery can be operated on during the same hospitalization without an increase in morbidity, compared with those patients discharged and later readmitted for elective resection.
Endoluminal stenting of CD strictures is a safe and effective alternative to surgery which can provide lasting benefit in select patients. Further studies are necessary to clarify the full impact of this technology on long-term management of this complex disease.
Underwater blasts propagate further and injure more readily than equivalent air blasts. Development of effective personal protection and countermeasures, however, requires knowledge of the currently unknown human tolerance to underwater blast. Current guidelines for prevention of underwater blast injury are not based on any organized injury risk assessment, human data or experimental data. The goal of this study was to derive injury risk assessments for underwater blast using well-characterized human underwater blast exposures in the open literature. The human injury dataset was compiled using 34 case reports on underwater blast exposure to 475 personnel, dating as early as 1916. Using severity ratings, computational reconstructions of the blasts, and survival information from a final set of 262 human exposures, injury risk models were developed for both injury severity and risk of fatality as functions of blast impulse and blast peak overpressure. Based on these human data, we found that the 50% risk of fatality from underwater blast occurred at 302±16 kPa-ms impulse. Conservatively, there is a 20% risk of pulmonary injury at a kilometer from a 20 kg charge. From a clinical point of view, this new injury risk model emphasizes the large distances possible for potential pulmonary and gut injuries in water compared with air. This risk value is the first impulse-based fatality risk calculated from human data. The large-scale inconsistency between the blast exposures in the case reports and the guidelines available in the literature prior to this study further underscored the need for this new guideline derived from the unique dataset of actual injuries in this study.
We examined diminutive colonic polyps to identify relationships between thermal electrocoagulation or resection trauma cytologic artifacts, type of thermal electrocoagulation, polyp size, and the interobserver variation among 3 pathologists. The 3 pathologists independently evaluated 119 colonic polyps 5 mm or less in maximum dimension for diagnosis and degree of thermal electrocoagulation or resection trauma cytologic artifacts. The maximum dimension of the polyps and type of thermal electrocoagulation were recorded. The average percentage of polyps in which a definitive diagnosis could not be made because of cytologic artifacts was 16.5% (range, 11.8%-19.3%). Decreasing polyp size was associated linearly with the inability to make a definitive diagnosis owing to cytologic artifacts. Polyps smaller than 2 mm significantly more often could not be definitively diagnosed by at least 1 pathologist owing to cytologic artifacts, including some polyps that were excised without thermal electrocautery. Interobserver variation increased with decreasing polyp dimension. Two millimeters seems to represent a cut point, below which the likelihood that a definitive diagnosis can be made can be increased if thermal electrocoagulation is used. This small size seems to make them especially susceptible to cytologically injurious forces.
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