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Biomedical subjects

M Erol Demirseren

Publications and source records attributed to M Erol Demirseren.

9 recordsLinked to original sources
PubMed2004

Reappraisal of island modifications of lateral calcaneal artery skin flap.

Reconstruction of soft-tissue defects of the calcaneal region and the heel is very demanding and necessitates, as a rule, a sensate and thin flap. The ideal characteristics of a sensate and thin layer of flap should be combined with a reliable blood supply and minimal morbidity at the donor site. The authors report an updated review of their experience with the use of island modifications of the lateral calcaneal artery skin flap-the lateral calcaneal island flap, the lateral calcaneal V-Y advancement flap, and the bilobed-shaped lateral calcaneal island advancement flap-for the reconstruction of small and medium-sized tissue defects over the exposed calcaneal tendons and calcaneal bones of 18 patients. All of the procedures were performed under spinal or epidural anesthesia. There were no problems associated with flap viability, but the authors have seen necrosis of undermined skin between the lateral malleolus and calcaneal tendon in two cases and a partial loss of skin graft in one case. In this article, the authors discuss some advantages and disadvantages of the use of a lateral calcaneal island flap and its modifications.

Adult↗
PubMed2004

Island rat groin flaps with twisted pedicles.

Clinical attempts are made to avoid rotating a flap and twisting the pedicle for fear of perfusion compromise. Torsion of an island rat groin flap pedicle is not a well-recognized experimental entity. The authors describe the results of island flap rotation with pedicle twisting in the rat groin flap model. Forty male Wistar rats were randomly divided into four groups of 10 animals each. In each group, bilateral groin flaps were elevated; one flap was sutured in place without rotation and the contralateral flap was subjected to 180, 270, 360, or 720 degrees of rotation. Blood flow within the flaps was assessed by laser Doppler flowmetry, and flap edema and necrosis were determined 10 days postoperatively. No differences were noted between control flaps and those subjected to 180 and 270 degrees of rotation. Although flaps subjected to 360 degrees of rotation demonstrated a large amount of postoperative edema and congestion of the subcutaneous tissue with some histologic changes, all flaps in this group survived. Measured flap weights at death were different from those of controls. All flaps subjected to 720 degrees of rotation underwent ischemic necrosis. Because of the differences between human skin architecture and rat skin architecture it cannot be concluded that similar results would be observed in any human skin flap. There might be three important points arising from this study of unknowingly twisted island groin flap pedicles in the rat model: (1) twisting of less than 360 degrees has no effect on flap survival; (2) twisting of 720 degrees is always associated with skin flap necrosis; (3) twisting of 360 degrees, although associated with some changes, does not cause skin flap necrosis.

Animals↗
PubMed2003

Hatchet-shaped tensor fascia lata musculocutaneous flap for the coverage of trochanteric pressure sores: a new modification.

The tensor fascia lata flap is one of the appropriate choices for the coverage of trochanteric pressure sores. The authors designed a new, hatched-shaped tensor fascia lata musculocutaneous flap with distal Z-plasty closure and applied it to four trochanteric defects in 4 patients. Satisfactory results were obtained in all patients. The hatchet-shaped tensor fascia lata musculocutaneous flap is very safe, reliable, and practical. Designing the flap in a hatchet shape allows one to use the proximal and well-vascularized portion of the flap in the trochanteric pressure sore area. Another important advantage is the possibility of reuse resulting from recurrence. Prevention of a "dog-ear" deformity at the recipient site provides a smooth contour on the lateral aspect of the thigh. Another advantage is the tension-free Z-plasty closure of the donor site without need of grafting.

Adolescent↗