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Biomedical subjects

V Mitz

Publications and source records attributed to V Mitz.

116 records · Page 7Linked to original sources
PubMedDate not supplied

Advances in aesthetic surgery.

The evolution of aesthetic surgery began centuries before the birth of Christ. Since Sushutra's first attempts, surgeons still try to achieve or reconstruct the perfection of individual beauty. Surgeons who are engaged in this field of plastic surgery are called cosmetic or aesthetic surgeons. Aesthetic surgery is not just a specialization concerned largely with the removal of the outward signs of aging, nor is it limited to plastic surgery for improvement by restoration of damaged areas of skin and removal of blemishes. Aesthetic surgery crosses the dividing line between surgery for reconstruction and alteration of deviations (which do not in themselves constitute objective deformities) and is sometimes even performed without medical indication, but just for the gratification of individual vanity. This article summarizes the progress of aesthetic surgery during the last decade in some aspects of the field and tries to estimate its' lasting value.

Esthetics↗
PubMedDate not supplied

Viscoelastic properties of the superficial musculoaponeurotic system (SMAS): a microscopic and mechanical study.

A study was undertaken to determine the physical properties and microscopic structure of the superficial musculoaponeurotic system (SMAS) tissue. Forty virginal specimens and eight reoperated specimens were examined. The following findings were discovered. 1) Microscopic appearance shows the SMAS to consist of collagen fibers, a relatively high concentration of elastic fibers interspersed with fat cells. 2) On scanning electron microscopy, the virginal SMAS shows the collagen fibers to have a similar convoluted appearance as in the dermis. There is some evidence of parallelization of the collagen fibers in the reexcised SMAS specimens. 3) Mechanical testing (Instron) demonstrates that both the SMAS and preauricular skin were subjected to a series of loading/ unloading tests at various rates, amplitudes, and stress relaxation tests. Both sets of specimens indicated definite viscoelastic properties. Although the mechanical behavior of both tissues was somewhat similar, the viscoelastic effect of the SMAS was less pronounced. A slackening effect of the SMAS indicated a gradual expansion of the SMAS postoperatively. These results could provide some indication of the long-term effects of SMAS surgery.

Collagen↗
PubMedDate not supplied

Experimental cardioplasty using the latissimus dorsi muscle flap.

This study was undertaken to examine the possibility of using the latissimus dorsi muscular flap, divided in two parts thus covering the surfaces of the heart, and inserting it into the thoracic cavity by means of a segmental resection of the second rib. After cadaver case studies, 15 operations were performed on 5 Beagle dogs. The first group of 5 operations consisted of a latissimus dorsi flap graft over the heart. The second group and third group of operations (3 and 6 months later) consisted of reoperating for muscular and cardiac biopsies and electrical stimulation tests on the heart-muscle complex. The latissimus dorsi flap provided a sizable mass of contractile tissue. The haemodynamic studies showed no compressive or constrictive phenomenon of the muscle on the heart and revealed the preservation of an appropriate cardiac output for short intervals of time (2 hours), through phasic electrostimulation of the flap. The histopathological studies showed conserved muscular structure. The technical feasibility, histological adaptability and electrophysiological properties of this muscular flap makes it appropriate to develop a functional stimulation programme and perhaps adequate for the treatment of dysplasic, ischemic, tumoral and other acquired or congenital myocardial diseases.

Animals↗