RESUMEN
OBJECTIVE: Rebleeding of an aneurysm is a leading cause of morbidity and mortality after subarachnoid hemorrhage (SAH). Whereas numerous studies have demonstrated the risk factors associated with rebleeding, few data on complications of rebleeding, including its effect on the development of delayed cerebral ischemia (DCI), are available. METHODS: A nested case-control study was performed on patients with rebleeding and control subjects matched for modified Fisher scale, Hunt-Hess grade, age, and sex previously entered into a prospective database. Rebleeding was defined as new hemorrhage apparent on repeat CT with or without new symptoms. Incidence and time course of DCI and hospital complications were compared. A secondary analysis of DCI and hospital complications was also performed on subjects surviving to postbleed day 7. RESULTS: We identified 120 patients with rebleeding and 359 control subjects from 1996 to 2011. The rebleeding rate was 8.6%. In both the primary and secondary analyses, there was no difference in the incidence of DCI or its time course (29% vs. 27%, p = 0.6; 7 ± 5 vs. 7 ± 6 days, p = 0.9 for primary analysis; 39% vs. 31%, p = 0.1, 7 ± 5 vs. 7 ± 6 days, p = 0.6 for the secondary analysis). In a multivariate logistic regression model, rebleeding was associated with the complications of hyponatremia, respiratory failure, and hydrocephalus. Patients with rebleeding had higher rates of mortality, brain death, and poor outcomes. CONCLUSIONS: Rebleeding after SAH is associated with multiple medical and neurologic complications, resulting in higher morbidity and mortality, but is not associated with change of incidence or timing of DCI.
Asunto(s)
Isquemia Encefálica/etiología , Aneurisma Intracraneal/diagnóstico , Hemorragia Subaracnoidea/complicaciones , Vasoespasmo Intracraneal/diagnóstico , Anciano , Isquemia Encefálica/epidemiología , Estudios de Casos y Controles , Femenino , Humanos , Incidencia , Aneurisma Intracraneal/tratamiento farmacológico , Aneurisma Intracraneal/cirugía , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Prevención Secundaria , Hemorragia Subaracnoidea/epidemiología , Factores de Tiempo , Vasoespasmo Intracraneal/epidemiologíaRESUMEN
PURPOSE: The aim of this study was to test if the techniques learned during our early learning experience have proved to be effective in reducing the complications specifically related to the laparoscopic technique of colorectal surgery. METHODS: From October 1991 until July 1996, 195 laparoscopic operations were performed on the colon and the rectum. These data were divided into "early" and "latter" groups. The conversion reasons and early and late postoperative complications were analyzed and compared. RESULTS: Incidence of conversions required because of iatrogenic injuries showed a decline from 7.3 percent in the early group to 1.4 percent in the latter group. Sixty-six postoperative complications were observed in 59 (30.3 percent) patients. Complications specifically related to the technique of laparoscopic surgery occurred in nine (4.6 percent) patients. These were postoperative bleeding in three patients, port site hernias in five patients, and left ureteric stricture in one patient. Eight (6.5 percent) of these complications occurred in the early group, whereas one (1.4 percent) occurred in the latter group. Analyzing the conversions caused by intraoperative iatrogenic injuries and the specific postoperative complications together reveals that the incidence of 13.8 percent (17/123) in the early group has been reduced significantly to 2.8 percent (2/72) in the latter group. CONCLUSIONS: On the basis of our experience, we have identified techniques, which are discussed in detail, to make laparoscopic colorectal surgery safe. Strict adherence to these techniques has significantly reduced the incidence of complications, specifically those related to the laparoscopic technique.