Hypertonic saline modulation of intestinal tissue stress and fluid balance

Charles S. Cox, Ravi Radhakrishnan, Lindsey Villarrubia, Hasen Xue, Karen Uray, Brijesh S. Gill, Randolph H. Stewart, Glen A. Laine

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Crystalloid-based resuscitation of severely injured trauma patients leads to intestinal edema. A potential mechanism of intestinal edema-induced ileus is a reduction of myosin light chain phosphorylation in intestinal smooth muscle. We sought to determine if the onset of edema initiated a measurable, early mechanotransductive signal and if hypertonic saline (HS) can modulate this early signal by changing intestinal fluid balance. An anesthetized rat model of acute interstitial intestinal edema was used. At laparotomy, the mesenteric lymphatic was cannulated to measure lymph flow and pressure, and a fluid-filled micropipette was placed in the intestinal submucosa to measure interstitial pressure. Rats were randomized into four groups (n = 6 per group): sham, mesenteric venous hypertension + 80 mL/kg 0.9% isotonic sodium chloride solution (ISCS 80), mesenteric venous hypertension + 80 mL/kg 0.9% ISCS + 4 mL/kg 7.5% saline (ISCS 80 + HS), or 4 mL/kg 7.5% saline (HS alone) to receive the aforementioned intravenous fluid administered over 5 min. Measurements were made 30 min after completion of the preparation. Tissue water, lymph flow, and interstitial pressure were measured. Resultant applied volume induced stress on the smooth muscle (σravi-muscularis) was calculated. Mesenteric venous hypertension and crystalloid resuscitation caused intestinal edema that was prevented by HS. Intestinal edema caused an early increase in intestinal interstitial pressure that was prevented by HS. Hypertonic saline did not augment lymphatic removal of intestinal edema. σravi-muscularis was increased with onset of edema and prevented by HS, paralleling the interstitial pressure data. Intestinal edema causes an early increase in interstitial pressure that is prevented by HS. Prevention of the edema-induced increase in interstitial pressure serves to blunt the mechanotransductive signal of σravi-muscularis.

Original languageEnglish (US)
Pages (from-to)598-602
Number of pages5
JournalShock
Volume29
Issue number5
DOIs
StatePublished - May 2008
Externally publishedYes

Fingerprint

Water-Electrolyte Balance
Edema
Pressure
Lymph
Hypertension
Resuscitation
Smooth Muscle
Myosin Light Chains
Ileus
Sodium Chloride
Laparotomy
Phosphorylation

Keywords

  • Hypertonic saline
  • Intestinal edema
  • Intestine
  • Mechanotransduction
  • Resuscitation

ASJC Scopus subject areas

  • Critical Care and Intensive Care Medicine
  • Physiology

Cite this

Cox, C. S., Radhakrishnan, R., Villarrubia, L., Xue, H., Uray, K., Gill, B. S., ... Laine, G. A. (2008). Hypertonic saline modulation of intestinal tissue stress and fluid balance. Shock, 29(5), 598-602. https://doi.org/10.1097/SHK.0b013e318157eba7

Hypertonic saline modulation of intestinal tissue stress and fluid balance. / Cox, Charles S.; Radhakrishnan, Ravi; Villarrubia, Lindsey; Xue, Hasen; Uray, Karen; Gill, Brijesh S.; Stewart, Randolph H.; Laine, Glen A.

In: Shock, Vol. 29, No. 5, 05.2008, p. 598-602.

Research output: Contribution to journalArticle

Cox, CS, Radhakrishnan, R, Villarrubia, L, Xue, H, Uray, K, Gill, BS, Stewart, RH & Laine, GA 2008, 'Hypertonic saline modulation of intestinal tissue stress and fluid balance', Shock, vol. 29, no. 5, pp. 598-602. https://doi.org/10.1097/SHK.0b013e318157eba7
Cox, Charles S. ; Radhakrishnan, Ravi ; Villarrubia, Lindsey ; Xue, Hasen ; Uray, Karen ; Gill, Brijesh S. ; Stewart, Randolph H. ; Laine, Glen A. / Hypertonic saline modulation of intestinal tissue stress and fluid balance. In: Shock. 2008 ; Vol. 29, No. 5. pp. 598-602.
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