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Biomedical subjects

T J Krizek

Publications and source records attributed to T J Krizek.

At least 19 recordsLinked to original sources

Difficult wounds: radiation wounds.

In an era of modern radiotherapy, problems associated with the indiscriminate treatment of benign disease have largely disappeared. Skin sparing effects of super voltage radiation equipment make the problems previously seen with orthovoltage equipment less frequent. Vigilance on the part of the workers in the field, in general, protects from the disasters that befell Thomas Edison's laboratory assistant. Despite these modern advances, the reconstructive surgeon often faces problems of managing acute local radiation injury from accident following planned therapeutic radiation or the ulcerations and breakdowns seen months or years after radiation therapy. The single most serious hazard to surgery in radiated tissue is the lodgment of bacteria in this tissue rendered avascular by the radiation and secondary necrosis from the infection itself. The principles of management are no different from those used for other chronic granulating wounds: local wound care, appropriate topical antibacterial therapy, systemic antibiotics during the perioperative period and, most importantly, adequate soft tissue coverage.

Acute Disease

Wound contraction and fibrocontractive disorders.

A most important contribution to the understanding of wound healing has been the identification of the myofibroblast. These cells contract like smooth muscle cells and have been identified in a variety of chronic and open wounds. The myofibroblasts have been reported as the causative factor resulting in the wound contraction. This report demonstrates the presence of the myofibroblasts in breast capsule contraction, as well as in Peyronie's disease. The presence of the myofibroblast in Peyronie's disease and Dupuytren's contracture suggests that the myofibroblast may be the causal factor behind the association of these two disorders. The evidence suggests that a spectrum of fibrocontractive disorders exists that has the myofibroblast as the common denominator. Some evidence is presented that permits the speculation that the myofibroblast may be a transformation of the local fibroblast to a smooth muscle cell in response to forces applied to the tissue.

Animals

George David Pollock and the development of skin grafting.

George David Pollock, F.R.C.S., convinced the world of the efficacy of skin autografting and homografting. Previous studies on the priority of skin grafting are reviewed. The life of Pollock, including a glimpse of the surgical world of the Victorian era is described. A detailed analysis of the roles and relationships of Pollock, Reverdin, and Gosselin is given.

England

A simplified technique for correction of the cleft lip nasal deformity.

The cleft lip nasal deformity is a result of imbalance of the structures caused by a collapsed alar cartilage, a widened nostril floor, and a lowered nasal orifice. This deformity can be corrected most readily by repositioning and supporting the collapsed alar cartilage of the cleft side. A technique has been developed to achieve this by releasing the ala from the nasolabial fold, elevating and supporting the alar cartilage, and repositioning the alar rim on its new deepithelialized base. One- to two-year follow-up of seven patients who underwent such repair has demonstrated satisfactory correction of the deformity.

Cleft Lip

Sutures and suturing--current concepts.

Currently available suture materials can be classified as nonabsorbable and absorbable types. Too often the surgeon selects the material on the basis of handling properties alone. The "perfect" suture material does not exist. Physical properties such as tensile strength, reactivity, size, and absorbability must be considered in light of current knowledge of wound healing. Placement of sutures is obviously as important as selection of material.

Biocompatible Materials

Identification of squamous cell carcinoma of the head and neck by tissue culture and immunological testing.

We outline the techniques used to successfully grow squamous cell carcinoma in tissue culture, and to test the cellular immunity of the patient by lymphocyte cytotoxicity studies. Lymphocytes cultured with malignant squamous cells killed from 40 to 60 percent of the tumor cells during 48 hours of incubation. These same lymphocytes did not show any killing potential against cultured melanoma cells or against cultured fibroblasts. This demonstrates an immune response that is tumor-antigen specific. There was no evidence of any serum-blocking factor, because the killing potential of these lymphocytes was not significantly altered by the addition of the patients' sera. The implications and potential for early diagnosis made possible by these techniques are discussed.

Adult

Ring avulsion injury.

Dependent upon the age, the occupation, and the requisites of an individual patient, the less important ulnar fingers may be of great value; in these the philosophy of discriminate preservation should be given considerable weight in the choice of treatment. Revascularization of fingers injured by a ring avulsion, and restoration of tactile gnosis with esthetic coverage make salvage of the valued ulnar fingers feasible. Three illustrative cases are described.

Adolescent

In defense of the open wound.

In a case of bilateral five-finger Dupuytren contracture, one hand was treated by open excision of the contracutred fascia and shortened skin with application of skin graft. The opposite hand was treated by the "open-palm" technique for comparison. There was no observable difference in the ranges of motion at the end of the two months following surgery. The open-palm technique continues to be simple alternative for the advanced cases requiring extensive excision of the palmar fascia leaving wide gaps in the palmar skin.

Dupuytren Contracture

The undelayed Mütter flap in head and neck reconstruction.

Twenty-one mastoid-occiput-based shoulder flaps have been used to reconstruct patients with head and neck cancer. When the tip of the flap does not extend beyond the midclavicle, this flap can safely be elevated and transferred into its final position without delay procedures. Not requiring secondary sectioning and implantation, the Mütter flap can successfully be used to reconstruct multiple defects within its arch. Its utility thus rivals the more commonly used medially based deltopectoral flap and forehead flap.

Head and Neck Neoplasms

Hidradenitis suppurativa of the groin, treated by excision and spontaneous healing.

A simplified approach to the surgical treatment of hidradenitis supprativa of the groin and perineum is presented. All tissue is excised down to the fascia, and the wound is allowed to granulate and epithelialize spontaneously. The advantage of the procedure are (1) a simple surgical technique, (2) easier postoperative care, (3) full and early ambulation, (4) no donor sites, (5) no losses of skin grafts, (6) early discharge from the hospital, and (7) early return to work.

Humans

Methods of reducing environmental stress for the acute burn patient.

All measures must be taken to enhance conservation of energy in patients with burns so that they can withstand the stresses imposed upon them. Many environmental factors can be regulated to decrease these stresses. Room temperature can be regulated to 29 degrees Celsius (84 degrees F) to decrease evaporative cooling and fluid loss. Humidity can be regulated to approximately 30 percent. Water temperature can be maintained between 35 and 37 degrees Celsius (95-98 degrees F) to encourage mobility and relaxation and to minimize shivering. Proper concentration of sodium can be used in the tank to minimize leaching to the electrolyte from the wound into the water. These measures for conserving energy help to provide the patient with the maximal metabolic efficiency necessary for wound healing and recovery.

Burns

Quantitative bacterial analysis of comparative wound irrigations.

It is a biologic fact that all open wounds contain bacteria and remain contaminated with varying levels of bacteria until successful wound closure has been accomplished. The sine qua non in the management of the contaminated wound has been and remains adequate sharp debridement. In a standardized experimental model, three methods of irrigation were compared employing quantitative bacteriology of tissue to evaluate their effectiveness at decreasing bacterial levels and reducing wound infection. The pulsating jet lavate was found to be significantly better than gravity flow irrigation or wound irrigation with a bulb syringe. These data on tissue biopsies support previous reports using surface and wound exudate cultures.

Animals

The current use of prophylactic antibiotics in plastic and reconstructive surgery.

A questionnaire distributed to plastic surgeons to determine their patterns of usage of systemic prophylactic antibacterial agents was answered by 1,025 respondents (73.7 percent). The patterns of usage among the respondents were determined for 29 circumstances and operations for the time of administration, and as influenced by 11 modifying factors. The data present the patterns of antibacterial use by plastic surgeons at this time.

Anti-Bacterial Agents

Scalping injury.

The history of scalp avulsions is presented, and one case is reported. A treatment plan for scalped patients is outlined.

Accidents, Occupational