Search PubMed⌕ Search

Biomedical subjects

L Hydo

Publications and source records attributed to L Hydo.

6 recordsLinked to original sources
PubMed2000

Secretory leukocyte protease inhibitor, an inhibitor of neutrophil activation, is elevated in serum in human sepsis and experimental endotoxemia.

OBJECTIVES: To document changes in serum secretory leukocyte protease inhibitor (SLPI) in human sepsis and in experimental endotoxemia in vivo. To compare changes in serum SLPI in human sepsis with changes in interleukin (IL)-6, IL-10, and tumor necrosis factor (TNF)-alpha. To determine whether or not changes in SLPI correlate with the severity of multiple organ dysfunction syndrome as measured by the maximal multiple organ dysfunction score. Finally, because neutrophils have been implicated in tissue injury associated with organ dysfunction, to determine whether recombinant human SLPI blocks activation of isolated human neutrophils. DESIGN: Case-control study and ex-vivo cellular assay. SETTING: Surgical intensive care unit and clinical research center of university hospitals; laboratory of a medical school. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: There was a significant dose-dependent elevation (50.2+/-4.0 ng/mL, p = .01) in plasma SLPI 12 hrs after administration of lipopolysaccharide to seven healthy adults (36.4+/-2.3 ng/mL). Further, serum concentrations of SLPI (132+/-15 ng/mL) were elevated in septic surgical patients compared with healthy controls (43+/-2 ng/mL, p < .01) and nonseptic surgical controls (69+/-10 ng/mL, p = .01). Serum SLPI concentrations correlated (r2 = .71, p < .01) better with organ dysfunction as measured by maximal multiple organ dysfunction score than did serum IL-6 (r2 = .49, p < .01), IL-10 (r2 = .05, p = .22), or TNF-alpha (r2 = .02, p = .44). We found that recombinant human SLPI in vitro inhibits TNF-alpha-induced hydrogen peroxide production by human neutrophils (ID50 = 1-2 microg/mL). CONCLUSIONS: Serum SLPI is elevated in human sepsis and experimental endotoxemia. Maximal concentrations of serum SLPI correlate significantly with maximal multiple organ dysfunction scores in patients with sepsis. Secretory leukocyte protease inhibitor may function to limit ongoing neutrophil-mediated tissue injury associated with organ dysfunction.

Adolescent↗
PubMed1999

Relationship of systemic inflammatory response syndrome to organ dysfunction, length of stay, and mortality in critical surgical illness: effect of intensive care unit resuscitation.

BACKGROUND: A systemic proinflammatory response has been implicated in the pathogenesis of organ dysfunction. The effects of surgery, surgical stress, anesthesia, and subsequent intensive care unit (ICU) resuscitation may affect the components of the systemic inflammatory response syndrome (SIRS) score (temperature, heart rate, respiratory rate, and white blood cell count). Any SIRS scores calculated within 24 hours after surgery or at the onset of nonoperative resuscitation may overestimate the proinflammatory response itself, making quantitation of SIRS at that time potentially too sensitive. We hypothesized that SIRS attributable to ICU resuscitation can be quantitated, and that SIRS after the first day of therapy in the ICU correlates with several outcomes. METHODS: Prospective analysis of 2300 surgical ICU admissions during a 49-month period. Acute Physiology and Chronic Health Evaluation III (APACHE III) scores were recorded after 24 hours. Daily and cumulative multiple organ dysfunction scores (0-4 points for each of 6 organs, 24 points total) and SIRS scores (1 point for each parameter, 4 points total) were recorded. Defined end points were hospital mortality, days in the ICU, and organ dysfunction. RESULTS: On day 1, 49.4% of patients had SIRS (score > or =2), whereas 34.5% of patients who remained in the ICU had SIRS (score > or =2) on day 2 (P<.001). The SIRS score decreased by a mean of 0.8 points from day 1 to day 2, regardless of the type of admission. A SIRS score that decreased on day 2, in comparison with the score on day 1, resulted in less mortality than a unchanged or higher score on day 2 (11% vs. 18% vs. 22%, P<.001). Systemic inflammatory response scores were higher for nonsurvivors than survivors on each of the first 7 days in the ICU. The day 2 SIRS score correlated well with the admission APACHE III score (P<.001) and all defined end points (all P<.001). The day 2 SIRS score also correlated with the day 2 multiple organ dysfunction score (P<.001). By multiple logistic regression, APACHE III (P<.001), day 2 SIRS score (P<.01) (but not day 1 SIRS score, P = .99), and day 2 multiple organ dysfunction score (P<.001) (but not day 1 multiple organ dysfunction score, P = .81) predicted mortality. CONCLUSIONS: Systemic inflammatory response syndrome attributable to surgery or surgical stress can be quantitated. Twenty-four hours of ICU resuscitation results in a decline in the SIRS score. The magnitude of the proinflammatory response on the second ICU day may be a useful predictor of outcome in critical surgical illness.

APACHE↗
PubMed1999

Gender-based differences in outcome in patients with sepsis.

HYPOTHESIS: Among factors postulated to affect outcome in sepsis is the gender of the patient, with a suggestion that females may have lower mortality. This study tested the hypothesis that female patients admitted to the surgical intensive care unit with a documented infection have a lower mortality rate. DESIGN: Retrospective analysis of a prospectively collected data set. SETTING: Surgical intensive care unit of a university hospital medical center. METHODS: Analysis of a consecutive series of 1348 patients who had signs of systemic inflammatory response syndrome on admission to a surgical intensive care unit. A cohort of 443 patients (32.9%) admitted with documented infection--and who therefore had sepsis, severe sepsis, or septic shock--constituted the study population. For each patient, APACHE (Acute Physiology and Chronic Health Evaluation) II and III scores, systemic inflammatory response syndrome score, gender, age, and hospital mortality were recorded. Chi2 With Fisher exact test was performed to compare mortality rates between males and females. Univariate analysis of variance was used to compare continuous variables in discrete populations. Multivariate analysis of variance was used to determine which factors independently predicted mortality. PRIMARY OUTCOME MEASURES: Mortality, intensive care unit length of stay, hospital length of stay, and maximal multiple organ dysfunction score. Outcomes stratified by gender. RESULTS: Patients had mean +/- SEM age of 67+/-1 years; mean +/- SEM APACHE II and III scores of 20.1+/-0.4 and 67.7+/-1.0 points, respectively. There were no demographic differences between genders. Overall, 104 (23.5%) of 443 patients with sepsis died. The difference in mortality rates between female and male patients was not significant, except in octogenarians (P = .05). Multivariate analysis of variance, APACHE III (P<.001), maximal multiple organ dysfunction score (P<.001), and female gender (P =.02) predicted mortality. In females, APACHE III (P = .03) and maximal multiple organ dysfunction score (P<.001) predicted mortality, but age did not. CONCLUSION: Female gender is an independent predictor of increased mortality in critically ill surgical patients with documented infection.

APACHE↗
PubMed1998

Beneficial effects of chest tube drainage of pleural effusion in acute respiratory failure refractory to positive end-expiratory pressure ventilation.

BACKGROUND: As part of an ongoing prospective evaluation of the response of acute respiratory failure (ARF) to ventilation with titrated amounts of positive end-expiratory pressure (PEEP), a subset of patients with a poor response to the initial application of PEEP and radiographic evidence of pleural effusion was identified. The effusion(s) were treated by tube thoracostomy (TT) to test the hypothesis that drainage would have a favorable effect on oxygenation and compliance in critically ill patients with substantial pulmonary dysfunction. METHODS: Consecutive patients with ARF underwent a titrated progressive application of PEEP if arterial oxygen saturation was less than 90% on fraction of inspired oxygen less than 0.5. One or two thoracostomy tubes (TT) were placed afterward in patients with radiologic evidence of effusion who had a poor response to PEEP therapy. The lung injury score (LIS), PaO2:FiO2 (P:F), peak airway pressure, dynamic compliance, and TT output were recorded. Changes over time were analyzed by one-way analysis of variance with repeated measures. RESULTS: Nineteen of 199 patients needed TT. LIS was 3.0 +/- 0.1. Maximum PEEP was 16.6 +/ 1.0 cm H2O. TT drainage was 863 +/- 164 ml in the first 8 hours. Mortality was 63% (12 of 19) but only 41% (74 of 180) in the patients who did not require TT (p = 0.11). TT improved oxygenation and compliance immediately after insertion in 17 of 19 patients, and P:F remained statistically higher (245 +/- 29 versus 151 +/- 13, p < 0.01) 24 hours after TT drainage. There was no correlation between the volume of fluid removed and P:F either immediately (R2, 0.16) or 24 hours after TT (R2, 0.07). CONCLUSIONS: Drainage of pleural fluid resulted in a significant improvement in oxygenation in ARF patients with pleural effusions who were refractory to treatment with mechanical ventilation and PEEP. TT represents a simple and safe alternative for aggressive management of selected patients, obviating the inherent risk of pneumothorax with thoracentesis and possibly avoiding the need for more complex forms of support in this critically ill patient population.

Acute Disease↗
PubMed1996

A double-blinded evaluation of intraperitoneal bupivacaine vs saline for the reduction of postoperative pain and nausea after laparoscopic cholecystectomy.

BACKGROUND: Intraperitoneal local anesthesia has been reported to reduce postoperative pain after laparoscopy for gynecologic procedures that do not require a great deal of dissection or manipulation of viscera. This study was performed to determine the efficacy of intraperitoneal bupivacaine in laparoscopic cholecystectomy (LC). METHODS: Fifty-five patients were evaluable in this randomized, double-blind, placebo-controlled study. Twenty-six patients received bupivacaine (0.1%) and 29 patients received placebo (saline). Prior to any dissection of the gallbladder, the surgeon irrigated 100 ml of experimental solution under the right hemidiaphragm, over Glisson's capsule, over the gallbladder serosa, and into the subhepatic space. The operation was then performed as usual. Postoperatively, analgesic medication usage, nausea, vomiting, and pain scores were determined during hospitalization. A questionnaire was given to each patient upon discharge from the hospital in order to continue monitoring medications and pain for the first 48 h at home. RESULTS: Postoperative pain was reduced significantly (P < 0.05) in the patients who received bupivacaine, but the effect was modest and observable only during the first 6 h after surgery. Despite this difference, there was no significant reduction in the amount of analgesic medication used by the patients who received bupivacaine, nor was there any reduction in nausea, vomiting, or shoulder pain when queried specifically. CONCLUSIONS: Intraperitoneal bupivacaine offered a detectable, albeit subtle benefit to patients undergoing LC. However, the effect was transient and had little impact upon the patient's convalescence.

Adolescent↗