Gastrointestinal tract secretions, electrolyte composition, and suggested replacement

Source	Sodium (mEq/L)	Potassium (mEq/L)	Bicarbonate (mEq/L)	Chloride (mEq/L)	Volume (mL/d)	Replacement
Gastric	60	10	0	90	2000 to 2500	0.45 NS + 10 K
Pancreatic	140	5	90 to 110	30 to 45	1000	NS + 10 K + HCO3
Bile	140	5	35	100	1500
Small bowel	100 to 130	15	25 to 35	100 to 140	3500	NS + 10 K
Colon (diarrhea)	50	30	50	50	1000 to 4000	0.45 NS + 20 K

Original figure modified for this publication. From: Parli SE, Pfeifer C, Oyler DR, et al. Redefining "bowel regimen": Pharmacologic strategies and nutritional considerations in the management of small bowel fistulas. Am J Surg 2018; 216:351. Table used with the permission of Elsevier Inc. All rights reserved.

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Gastrointestinal tract secretions, electrolyte composition, and suggested replacement