Abstract：
BACKGROUND:Laparoscopic Nissen fundoplication (LNF) is gaining popularity. Although the hemodynamic effects of the typical pneumoperitoneum have been studied, the additional consequences of the hiatal dissection necessary for LNF have not. METHODS:Seven female pigs were anesthetized, intubated, and ventilated with a volume ventilator and hemodynamic and mechanical pressure monitoring devices were placed. Pressures were recorded every 15 minutes for 1 hour after each of four interventions: (1) anesthesia induction, (2) CO2 pneumoperitoneum (15 mm Hg), (3) LNF, and (4) release of pneumoperitoneum (and removal of ports). RESULTS:Right atrial, inferior vena caval, mediastinal, pleural, airway, and pulmonary capillary wedge pressures all increased after pneumoperitoneum (p < 0.05). Only mediastinal pressure (8.6 vs 13.7 mm Hg, pneumoperitoneum vs LNF; p < 0.05) and pleural pressure (2.6 vs 3.5 mm Hg, pneumoperitoneum vs LNF; p < 0.05) showed a further significant increase after LNF. In addition, cardiac output fell significantly after LNF (5.9 vs. 4.6 L/min; p < 0.05). Mediastinal pressure and cardiac output remained significantly altered after the release of pneumoperitoneum. CONCLUSIONS:Surgical disruption of the esophageal hiatus during LNF causes both increased mediastinal and pleural pressure and a significant reduction in cardiac output. These findings uncover a previously unsuspected physiologic detriment that may occur during LNF.
journal_name
Surgeryjournal_title
Surgeryauthors
Talamini MA,Mendoza-Sagaon M,Gitzelmann CA,Ahmad S,Moesinger R,Kutka M,Toung Tdoi
10.1016/s0039-6060(97)90026-xsubject
Has Abstractpub_date
1997-08-01 00:00:00pages
345-52; discussion 352-3issue
2eissn
0039-6060issn
1532-7361pii
S0039-6060(97)90026-Xjournal_volume
122pub_type
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