Tursi Tammy
Endoscopy Department, Hospital of the University of Pennsylvania, Philadelphia, USA.
J Am Acad Nurse Pract. 2010 Dec;22(12):640-7. doi: 10.1111/j.1745-7599.2010.00567.x. Epub 2010 Nov 9.
The purpose of this article is to educate nurse practitioners about the pathophysiology surrounding the development of portal hypertension and the effective use of nonselective ß-blockers to prevent primary bleeding and decrease the mortality risk.
The articles included were retrieved via ISI Web of Science using the years 2004-2009 and key words cirrhosis, portal hypertension, esophageal varices, and beta-blockers. This information included scholarly books, journal reviews, retrospective chart reviews, and prospective randomized studies.
Cirrhosis is the leading cause of portal hypertension in Europe and North America. Esophageal varices are a result of the portosystemic collaterals the body develops to decompress the portal system. Hemorrhage from esophageal varices is a major cause of morbidity and mortality. Prevention of a primary bleed is the goal of therapy and is accomplished with nonselective ß-blockers.
Very few patients with portal hypertension and esophageal varices are on ß-blockers. Use of nonselective ß-blockers has been found to lower portal pressure and decreases the risk of bleeding from esophageal varices and therefore decreases mortality. Patients unable to use ß-blockers can undergo endoscopic variceal ligation as an alternate method to reduce risk of bleeding.
本文旨在让执业护士了解门静脉高压形成的病理生理学,以及非选择性β受体阻滞剂在预防初次出血和降低死亡风险方面的有效应用。
纳入的文章通过ISI科学网检索,检索时间为2004年至2009年,关键词为肝硬化、门静脉高压、食管静脉曲张和β受体阻滞剂。这些信息包括学术书籍、期刊综述、回顾性病历审查和前瞻性随机研究。
在欧洲和北美,肝硬化是门静脉高压的主要病因。食管静脉曲张是机体为减轻门静脉系统压力而形成的门体侧支循环的结果。食管静脉曲张出血是发病和死亡的主要原因。预防初次出血是治疗的目标,可通过非选择性β受体阻滞剂实现。
门静脉高压和食管静脉曲张患者中很少有人使用β受体阻滞剂。已发现使用非选择性β受体阻滞剂可降低门静脉压力,降低食管静脉曲张出血风险,从而降低死亡率。无法使用β受体阻滞剂的患者可接受内镜下静脉曲张结扎术,作为降低出血风险的替代方法。