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Flow in Lymphatic Networks: Interaction between Hepatic and Intestinal Lymph Vessels
Author(s) -
STEWART RANDOLPH H.,
LAINE GLEN A.
Publication year - 2001
Publication title -
microcirculation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.793
H-Index - 83
eISSN - 1549-8719
pISSN - 1073-9688
DOI - 10.1111/j.1549-8719.2001.tb00171.x
Subject(s) - lymph , lymphatic system , medicine , ascites , portal hypertension , cisterna magna , cisterna , portal venous pressure , edema , anatomy , pathology , cirrhosis , chemistry , cerebrospinal fluid , biochemistry , cell , golgi apparatus
Objective : Lymph from both the liver and intestine flows into the cisterna chyli. We hypothesized that increasing liver lymph flow would increase cisterna chyli pressure and, thereby, decrease intestinal lymph flow, potentiating intestinal edema formation. Methods : Anesthetized dogs were instrumented to measure and manipulate portal vein pressure and cisterna chyli pressure. The effects of directly increasing portal pressure with and without directly increasing cisterna chyli pressure on intestinal wet‐to‐dry ratio and intestinal ascites formation rate were determined. Target values for portal and cisterna chyli pressures were determined following elevation of inferior vena caval pressure to levels seen in patients with obstructive caval disease. Results : Direct elevation of portal pressure (P port ) alone to 17.5 mm Hg caused a significant increase in intestinal wet‐to‐dry ratio (3.98 ± 0.24 vs. 3.40 ± 0.43) and the rate of ascites formation (0.36 ± 0.12 vs. 0.05 ± 0.03 mL/g dry wt/h). Simultaneous direct elevation of cisterna chyli pressure to 6.0 mm Hg and P port to 17.5 mm Hg caused further increases in intestinal wet‐to‐dry ratio (5.52 ± 1.20) and ascites formation (0.57 ± 0.11 mL/g dry wt./h). Conclusions : Inferior vena caval hypertension increases liver lymph flow that elevates cisterna chyli pressure, which inhibits intestinal lymph flow and augments intestinal edema formation.