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Enhancement of Tissue Expansion by Calcium Channel Blocker: A preliminary study.

Copcu E, Sivrioglu N, Sisman N, Aktas A, Oztan Y - World J Surg Oncol (2003)

Bottom Line: Following extraction of the expanders, the flaps were elevated and less retraction was observed in the study group compared to controls.CONCLUSION: Verapamil is safe when used topically and provides less retracted flaps.It can be suggested that verapamil acts on the myofibroblasts in the capsule around tissue expanders and thus increases efficiency of the expanders.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of the Plastic and Reconstructive Surgery, Medical Faculty, Adnan Menderes University, Aydin, Turkey. copcu@lycos.com

ABSTRACT
BACKGROUND: Reconstruction of the defects after surgical resection of tumors is one of the important issues in surgical oncology. It is essential that the defect should be covered with a tissue quite similar to the original one and is best achieved by harvesting tissue from an area adjacent to the defect. Tissue expansion is one of the most frequently used reconstructive techniques. A number of studies evaluated blood circulation, capsule formation, tissue tolerance, histomorphological changes and complications of expander placement. However, only a few attempted to enhance tissue expansion. This study we aimed to evaluate verapamil, a calcium channel blocker, to enhance tissue expansion. MATERIAL AND METHOD: Twelve New Zealand rabbits weighing between 900 gm and 1200 gm were assigned into study and control groups. High volume expanders (100, 200 or 300 cc) were placed into the subcutaneous tissue. Rabbits in the study group received verapamil. Expanders in the control group were inflated every three days to achieve same pressure as the study group. The size of the flaps was assessed by applying pressure on tip of the flap to demonstrate the contraction. Histopathological examinations were performed. RESULTS: By administering liquid earlier and more quickly less flap retraction was observed in the study group. In the control group expanders were exposed in two rabbits while no complication occurred in the study group. Following extraction of the expanders, the flaps were elevated and less retraction was observed in the study group compared to controls. CONCLUSION: Verapamil is safe when used topically and provides less retracted flaps. It can be suggested that verapamil acts on the myofibroblasts in the capsule around tissue expanders and thus increases efficiency of the expanders.

No MeSH data available.


Related in: MedlinePlus

Schematic view of the application of 2.46 Newton force to the tip of flaps with pulleys.
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Figure 4: Schematic view of the application of 2.46 Newton force to the tip of flaps with pulleys.

Mentions: The length of the flaps was measured twice to determine retraction ratios. The first measurement was made after the procedure of expansion was completed and the second measurement was made after the flaps were elevated. Following the elevation of the flaps, using a system of pulleys, a force of 2.46 Newton was applied on the tips of the flaps and the length of the flaps under the pressure was measured (Figure 4). Thus, the difference between the two values provided retraction ratios.


Enhancement of Tissue Expansion by Calcium Channel Blocker: A preliminary study.

Copcu E, Sivrioglu N, Sisman N, Aktas A, Oztan Y - World J Surg Oncol (2003)

Schematic view of the application of 2.46 Newton force to the tip of flaps with pulleys.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC239963&req=5

Figure 4: Schematic view of the application of 2.46 Newton force to the tip of flaps with pulleys.
Mentions: The length of the flaps was measured twice to determine retraction ratios. The first measurement was made after the procedure of expansion was completed and the second measurement was made after the flaps were elevated. Following the elevation of the flaps, using a system of pulleys, a force of 2.46 Newton was applied on the tips of the flaps and the length of the flaps under the pressure was measured (Figure 4). Thus, the difference between the two values provided retraction ratios.

Bottom Line: Following extraction of the expanders, the flaps were elevated and less retraction was observed in the study group compared to controls.CONCLUSION: Verapamil is safe when used topically and provides less retracted flaps.It can be suggested that verapamil acts on the myofibroblasts in the capsule around tissue expanders and thus increases efficiency of the expanders.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of the Plastic and Reconstructive Surgery, Medical Faculty, Adnan Menderes University, Aydin, Turkey. copcu@lycos.com

ABSTRACT
BACKGROUND: Reconstruction of the defects after surgical resection of tumors is one of the important issues in surgical oncology. It is essential that the defect should be covered with a tissue quite similar to the original one and is best achieved by harvesting tissue from an area adjacent to the defect. Tissue expansion is one of the most frequently used reconstructive techniques. A number of studies evaluated blood circulation, capsule formation, tissue tolerance, histomorphological changes and complications of expander placement. However, only a few attempted to enhance tissue expansion. This study we aimed to evaluate verapamil, a calcium channel blocker, to enhance tissue expansion. MATERIAL AND METHOD: Twelve New Zealand rabbits weighing between 900 gm and 1200 gm were assigned into study and control groups. High volume expanders (100, 200 or 300 cc) were placed into the subcutaneous tissue. Rabbits in the study group received verapamil. Expanders in the control group were inflated every three days to achieve same pressure as the study group. The size of the flaps was assessed by applying pressure on tip of the flap to demonstrate the contraction. Histopathological examinations were performed. RESULTS: By administering liquid earlier and more quickly less flap retraction was observed in the study group. In the control group expanders were exposed in two rabbits while no complication occurred in the study group. Following extraction of the expanders, the flaps were elevated and less retraction was observed in the study group compared to controls. CONCLUSION: Verapamil is safe when used topically and provides less retracted flaps. It can be suggested that verapamil acts on the myofibroblasts in the capsule around tissue expanders and thus increases efficiency of the expanders.

No MeSH data available.


Related in: MedlinePlus