The Effect of Body Mass Index and Weight-Adjusted Fluid Dosing on Mortality in Sepsis.

The Effect of Body Mass Index and Weight-Adjusted Fluid Dosing on Mortality in Sepsis.
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DOI:
10.1177/0885066620973917
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发表时间:
2022-01
影响因子:
3.1
通讯作者:
Purakal J
Purakal J
中科院分区:
医学3区
文献类型:
--
作者:
Ward MA;Kuttab HI;Lykins V JD;Wroblewski K;Hughes MD;Keast EP;Kopec JA;Rourke EM;Purakal J

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“拯救脓毒症运动”指南建议在脓毒症引起的低灌注后三小时 (30by3) 内补充 30 mL/kg 的液体,但一项国家规定允许肥胖患者根据理想体重而非实际体重 (IBW/ABW) 进行剂量调整。本研究旨在确定 30by3 对于严重败血症或败血性休克 (SS/SS) 患者在体重指数 (BMI) 类别方面的剂量效应,其次检查 IBW 与基于 ABW 剂量的临床影响。对在城市三级护理急诊室就诊的 SS/SS 成人(≥18 岁;n=1,032)进行回顾性队列研究。模型包括 MEDS 评分、抗生素使用时间、乳酸、肾衰竭和心力衰竭等。该队列中 10.2% 的人体重不足,28.7% 的人肥胖。总死亡率为 17.1%,其中休克死亡率为 20.4%。对于体重不足的患者(p = 0.02),在 30by3 剂量下每 5 mL/kg 死亡率呈指数增加,但肥胖患者则不然。 ABW 与 IBW-30by3 的剂量分别为 80.0% vs 52.4%(体重不足)、56.4% vs 56.9%(正常/超重)和 23.3% vs 46.0%(肥胖)。在所有 BMI 类别中,未达到基于 ABW 的 30by3 剂量的死亡率增加(OR 1.78,95% CI 1.18–2.69),而对 IBW 没有显着影响(OR 1.28,95% CI 0.87–1.91)。体重不足的 ABW 患者(OR 5.82,95% CI 1.32–25.57)仍因未能达到 ABW 剂量 30by3 而导致死亡率增加,但肥胖患者则不然。根据总体 ABW(β=2.40,95% CI 0.84–3.95)和 IBW 剂量(β=1.58,95% CI 0.07–3.08)观察,未达到 30by3 的 ICU 停留时间较长。对于肥胖和体重不足(IBW 剂量除外)的患者,这种效果仍然存在。对于未接受 30by3 的体重不足患者,观察到死亡率呈指数剂量效应增加。因此,对于体重不足的患者,使用 ABW 可能会放大剂量不足对死亡率的影响。液体剂量不会影响肥胖患者的死亡率,但我们警告不要在没有进一步研究的情况下偏离指南。
The Surviving Sepsis Campaign guidelines recommend 30 mL/kg of fluids within three hours (30by3) of sepsis-induced hypoperfusion, but a national mandate released an allowance for dosing based on ideal instead of actual body weight (IBW/ABW) for obese patients. This study aims to determine the dose-effect of 30by3 for patients with severe sepsis or septic shock (SS/SS) with respect to body mass index (BMI) categories and secondarily, examine the clinical impact of IBW vs. ABW-based dosing. Retrospective cohort study of adults (≥18 years; n=1,032) with SS/SS presenting to an urban, tertiary-care emergency department. Models include MEDS score, antibiotic timing, lactate, renal and heart failure, among others. The cohort was 10.2% underweight and 28.7% obese. Overall mortality was 17.1% with 20.4% shock mortality. An exponential increase in mortality was observed for each 5 mL/kg under 30by3 for underweight (p=0.02), but not obese patients. ABW vs IBW-30by3 dosing was reached in 80.0 vs 52.4% (underweight), 56.4 vs 56.9% (normal/overweight), and 23.3 vs 46.0% (obese). Across all BMI categories, there was increased mortality for not reaching ABW-based 30by3 dosing (OR 1.78, 95% CI 1.18–2.69) with no significant impact for IBW (OR 1.28, 95% CI 0.87–1.91). The increased mortality for failing to reach ABW-dosed 30by3 remained for underweight patients ABW (OR 5.82, 95% CI 1.32–25.57) but not obese patients. Longer ICU stays were observed for not reaching 30by3 based on ABW (β=2.40, 95% CI 0.84–3.95) and IBW dosing (β=1.58, 95% CI 0.07–3.08) overall. This effect remained for obese and underweight (except IBW dosing) patients. An exponential, dose-effect increase in mortality was observed for underweight patients not receiving 30by3. Therefore, the mortality impact of under-dosing may be amplified using ABW for underweight patients. Fluid dosing did not impact mortality for obese patients, but we caution against deviation from guidelines without further studies.
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