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Biomedical subjects

B Hirshowitz

Publications and source records attributed to B Hirshowitz.

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

Large liponecrotic pseudocyst formation following cheek augmentation by fat injection.

A case in which a growing cystic mass developed in the submandibular area, 6 months following fat injection to the cheek and mandibular area, is described. Histological examination revealed a liponecrotic pseudocyst. It is suggested that subcutaneous masses appearing in an area, which was previously injected with fat, should be excised. Diagnostic aspiration procedures may cause leakage of its oily content and possible further granulomatotic reactions and cysts.

Adipose Tissue↗
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

Topical treatment of toxic epidermal necrolysis with Iodoplex.

Toxic epidermal necrolysis (TEN) is characterized by extensive exfoliation of the epidermis, mucosal ulcerations and fever, after a recent intake of a new drug. TEN developed in an 8-year-old girl after she ingested sulfonamides and sustained skin injuries of 90% total body surface area. In addition to her critical care management, local treatment consisted of Iodoplex cream (Biosearch Laboratories, Haifa, Israel), a long-acting antimicrobial agent from which iodine is slowly released over 48 hours. Healing was observed within 8 to 17 days after initial application. Iodoplex cream is an additional topical agent for the local treatment of TEN when porcine heterografts or allografts might not be feasible.

Acrylic Resins↗