Effects of vascular pedicle ligation on blood flow in canine semitendinosus muscle

Mauricio Solano From the Departments of Anatomy and Radiology (Solano, Purinton, Munnell) and Small Animal Medicine (Chambers), University of Georgia, Athens, GA 30602.

Search for other papers by Mauricio Solano in
Current site
Google Scholar
PubMed
Close
 Med Vet
,
Paul T. Purinton From the Departments of Anatomy and Radiology (Solano, Purinton, Munnell) and Small Animal Medicine (Chambers), University of Georgia, Athens, GA 30602.

Search for other papers by Paul T. Purinton in
Current site
Google Scholar
PubMed
Close
 DVM, PhD
,
Jonathan N. Chambers From the Departments of Anatomy and Radiology (Solano, Purinton, Munnell) and Small Animal Medicine (Chambers), University of Georgia, Athens, GA 30602.

Search for other papers by Jonathan N. Chambers in
Current site
Google Scholar
PubMed
Close
 DVM
, and
John F. Munnell From the Departments of Anatomy and Radiology (Solano, Purinton, Munnell) and Small Animal Medicine (Chambers), University of Georgia, Athens, GA 30602.

Search for other papers by John F. Munnell in
Current site
Google Scholar
PubMed
Close
 VMD, PhD

SUMMARY

Blood flow to the semitendinosus muscle was studied in 12 dogs after ligation of either the proximal or distal vascular pedicle and elevation of the muscle from its normal position. Using 15-μm-diameter radioactive microspheres, flow was measured at rest, 6 and 18 days after muscle elevation and pedicle ligation. Mean blood flow in the proximal region of the muscle 6 and 18 days after ligation of the caudal gluteal (proximal) pedicle was not significantly different from mean blood flow calculated in the middle and distal regions of the muscle. There was also no significant difference in mean blood flow among proximal, middle, and distal regions of the muscle, 6 and 18 days after ligation of the distal caudal femoral (distal) pedicle. There was significantly (P < 0.05) increased blood flow between group-A (ligation of caudal gluteal artery) and group-C (operated-control) muscles, 6 and 18 days after surgery. There was no loss of muscle fiber striations or nuclei, or presence of fibrous tissue that might have indicated ischemic necrosis in any of the experimental groups. These results indicate that the entire semitendinosus muscle can be sustained by the blood flow from either of its 2 vascular pedicles, which reinforces its potential as a muscle flap.

SUMMARY

Blood flow to the semitendinosus muscle was studied in 12 dogs after ligation of either the proximal or distal vascular pedicle and elevation of the muscle from its normal position. Using 15-μm-diameter radioactive microspheres, flow was measured at rest, 6 and 18 days after muscle elevation and pedicle ligation. Mean blood flow in the proximal region of the muscle 6 and 18 days after ligation of the caudal gluteal (proximal) pedicle was not significantly different from mean blood flow calculated in the middle and distal regions of the muscle. There was also no significant difference in mean blood flow among proximal, middle, and distal regions of the muscle, 6 and 18 days after ligation of the distal caudal femoral (distal) pedicle. There was significantly (P < 0.05) increased blood flow between group-A (ligation of caudal gluteal artery) and group-C (operated-control) muscles, 6 and 18 days after surgery. There was no loss of muscle fiber striations or nuclei, or presence of fibrous tissue that might have indicated ischemic necrosis in any of the experimental groups. These results indicate that the entire semitendinosus muscle can be sustained by the blood flow from either of its 2 vascular pedicles, which reinforces its potential as a muscle flap.

Advertisement