Ionized calcium concentration in horses with surgically managed gastrointestinal disease: 147 cases (1988-1990)

Andrew J. Dant From the Veterinary Medical Teaching Hospital (Dart, Sullivan) and the Departments of Surgery (Snyder) and Medicine (Spier), School of Veterinary Medicine, University of California, Davis, CA 95616.

Search for other papers by Andrew J. Dant in
Current site
Google Scholar
PubMed
Close
 BVSc
,
Jack R. Snyder From the Veterinary Medical Teaching Hospital (Dart, Sullivan) and the Departments of Surgery (Snyder) and Medicine (Spier), School of Veterinary Medicine, University of California, Davis, CA 95616.

Search for other papers by Jack R. Snyder in
Current site
Google Scholar
PubMed
Close
 DVM, PhD
,
Sharon J. Spier From the Veterinary Medical Teaching Hospital (Dart, Sullivan) and the Departments of Surgery (Snyder) and Medicine (Spier), School of Veterinary Medicine, University of California, Davis, CA 95616.

Search for other papers by Sharon J. Spier in
Current site
Google Scholar
PubMed
Close
 DVM, PhD
, and
Kent E. Sullivan From the Veterinary Medical Teaching Hospital (Dart, Sullivan) and the Departments of Surgery (Snyder) and Medicine (Spier), School of Veterinary Medicine, University of California, Davis, CA 95616.

Search for other papers by Kent E. Sullivan in
Current site
Google Scholar
PubMed
Close
 VMD

Click on author name to view affiliation information

Summary

Packed cell volume, total plasma protein, serum sodium, potassium, and ionized Ca2+ concentrations, and blood pH were determined at the time of admission and following surgery in 147 horses with acute abdominal crisis. Horses were allotted to 3 categories on the basis of the surgical lesion: (1) nonstrangulating obstruction of the ascending or descending colon (category A, n = 76), (2) strangulating and nonstrangulating infarction of the cecum or ascending colon (category B, n = 37), and (3) strangulating and nonstrangulating infarction of the small intestine (category C, n = 25). Horses with low serum ionized Ca2+ concentration following surgery were given 23% calcium gluconate (100 to 300 ml) IV to effect, and ionized Ca2+ concentration was determined following treatment.

The serum ionized Ca2+ concentrations of horses in categories A, B, and C before and after surgery were lower than our normal laboratory reference range. Prior to surgery, serum ionized Ca2+ concentration measured from horses in category B and C was lower than that in horses in category A. There was no difference in ionized Ca2+ concentration in serum samples obtained before surgery in horses from category B and C, and in serum samples obtained following surgery. There was a decrease in ionized Ca2+ concentration during surgery in horses in category A. There was no change between preoperative and postoperative ionized Ca2+ concentration in the samples obtained from horses in category B and C. After calcium gluconate administration, all horses with low serum ionized Ca2+ after surgery had concentrations within our normal range.

Measurement of serum ionized Ca2+ in horses with an acute abdominal crisis is recommended. If concentrations are low, calcium gluconate diluted in fluids and administered iv to effect appears to provide an effective method of treatment.

Summary

Packed cell volume, total plasma protein, serum sodium, potassium, and ionized Ca2+ concentrations, and blood pH were determined at the time of admission and following surgery in 147 horses with acute abdominal crisis. Horses were allotted to 3 categories on the basis of the surgical lesion: (1) nonstrangulating obstruction of the ascending or descending colon (category A, n = 76), (2) strangulating and nonstrangulating infarction of the cecum or ascending colon (category B, n = 37), and (3) strangulating and nonstrangulating infarction of the small intestine (category C, n = 25). Horses with low serum ionized Ca2+ concentration following surgery were given 23% calcium gluconate (100 to 300 ml) IV to effect, and ionized Ca2+ concentration was determined following treatment.

The serum ionized Ca2+ concentrations of horses in categories A, B, and C before and after surgery were lower than our normal laboratory reference range. Prior to surgery, serum ionized Ca2+ concentration measured from horses in category B and C was lower than that in horses in category A. There was no difference in ionized Ca2+ concentration in serum samples obtained before surgery in horses from category B and C, and in serum samples obtained following surgery. There was a decrease in ionized Ca2+ concentration during surgery in horses in category A. There was no change between preoperative and postoperative ionized Ca2+ concentration in the samples obtained from horses in category B and C. After calcium gluconate administration, all horses with low serum ionized Ca2+ after surgery had concentrations within our normal range.

Measurement of serum ionized Ca2+ in horses with an acute abdominal crisis is recommended. If concentrations are low, calcium gluconate diluted in fluids and administered iv to effect appears to provide an effective method of treatment.

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 462 462 161
PDF Downloads 44 44 6
Advertisement