Biomedical subjects

M R Thatte

Publications and source records attributed to M R Thatte.

10 recordsLinked to original sources

PubMed1996

The effect of sphincter pharyngoplasty on the range of velar movement.

The aim of this study was to assess the mobility of the soft palate following sphincter pharyngoplasty in patients with velopharyngeal incompetence of variable aetiology. Pre- and postoperative videotape recordings of lateral view videofluoroscopy of 24 patients were retrospectively studied and compared with regard to the range of velar movement. Tracings of the velopharyngeal port were made on acetate paper directly from the television monitor and absolute angle measurements were taken. Analysis of the results showed a highly significant increase in the range of palatal movement postoperatively. There was no evidence of correlation between the magnitude of the increase and the postoperative improvement in speech. The findings and their implications are discussed.

Adolescent↗

PubMed1995

Use of type III venous flaps: single- and multistaged procedures.

Two cases are presented in which the principles of type III (arteriovenous) venous flaps were applied in single- and multistage procedures. In the first case, the flap was used for correction of a post-thermal burn adduction contracture of the first web space of the hand as a one-stage microvascular free flap and in the other for the resurfacing of a post-traumatic defect on the dorsum of the foot as a two-stage transfer. A brief review, along with the technique, advantages, mode of survival, and feasibility of using type III venous flaps, is presented. A simple classification of type III venous flaps is also suggested.

Adult↗

PubMed1993

Venous flaps.

One of the earliest postulates concerning the physiological basis of flap survival is attributed to Sushruta, who, in his inimitable style, very succinctly noted in Sanskrit verse the following words: "through continuity survives." Sanskrit being a very telegraphic language, what derives from these words is as follows: Through (the flap's) continuity (with its original location) (it) survives. The principle of continuity has survived through the ages, though continuity has come to imply vascular continuity based on the Harvesian model of circulation. No matter how we classify flaps, i.e., random or axial, the Harvesian model of circulation is the key to the mechanism of survival. Lately, however, a new category of flaps, that is, "venous flaps," have been reported by a number of investigators where the classical Harvesian model is not in evidence, at least apparently. The following effort is directed toward presenting the existing data on this subject for future guidance in research and clinical applications.

Animals↗

PubMed1990

A radical approach in the treatment of the deviated nose.

Surgical attempts to straighten a deviated nose do not always produce a satisfactory result, partly due to the surgeon's inability to straighten the anterior part of the nasal septum or to maintain it in a correct position postoperatively. In a radical departure from accepted norms we have, in eight cases, excised the deviated part of the anterior nasal septum and replaced it with a bone graft. The background and the need for this procedure are explained, followed by a case report in some detail. Details of the eight cases are given in a table and representative cases are presented with illustrations and comments regarding the problems encountered with the present method.

Adolescent↗

PubMed1989

The saphenous venous flap.

Eight cases, in which a new single-pedicled venous flap, based on the long saphenous vein, was used to close defects around the knee, are presented with the details of indications, size and survival. Of the eight cases, seven achieved their aim; five flaps survived completely, two had partial distal loss and one died completely. This clinical work is further confirmation that fasciocutaneous island flaps of fairly large dimensions, with a single cephalad vein, survive and can be used to cover defects in their adjacent areas.

Adolescent↗

PubMed1989

Static and dynamic computerised radioactive tracer studies, vital dye staining and theoretical mathematical calculations to ascertain the mode of survival of single cephalad channel venous island flaps.

Experiments were performed to ascertain the perfusion and drainage of single cephalad channel saphenous venous flaps in dogs. In the first experiment a standard saphenous flap and a single cephalad channel saphenous venous island flap were dissected on contralateral thighs of dogs. A radioactive tracer, 99mTc, was injected into a foreleg vein and its appearance in both flaps was monitored with the use of a static and dynamic scanner. After this experiment, Evans blue, a vital dye, was injected into the foreleg vein of the dog. Five minutes later both flaps were excised and the dye in the flaps was assayed quantitatively. In the third experiment radioactive tracer was injected into the single cephalad channel venous flap subcutaneously and its decay in the flap as well as its uptake in the rest of the body were measured dynamically. The experiments show that the single cephalad channel venous island flap is perfused by and drains through its single cephalad vein. A mathematical model to justify the above conclusion was worked out independently, based on standard values involved in mammalian circulatory mechanisms as in dog and man.

Animals↗

PubMed1989

Cephalic venous flap: a series of 8 cases and a preliminary report on the use of 99mTc labelled RBCs to study the saphenous venous flap in dogs.

From December 1985 to December 1987 a total of eight fasciocutaneous island flaps with only a proximal venous pedicle were performed. Seven of these eight survived completely. The standard flap design and operative technique are given. The results are presented in a tabulated form. One case is presented with illustrations. A preliminary report on the appearance of 99mTc tagged RBCs and Evans blue in a proximal venous saphenous island flap in the dog is included. Comments on the survival of these flaps and the solitary case where the flap necrosed completely are added.

Adult↗

PubMed1987

A study of the saphenous venous island flap in the dog without arterial inflow using a non-biological conduit across a part of the length of the vein.

This paper includes material which is a follow-up on the work of Se Min Baek et al. (1985) who demonstrated that in dogs a saphenous flap could survive without arterial inflow. Here we have repeated part of their work and confirmed it. In addition, this paper shows that in dogs a saphenous venous flap with only the cephalad venous channel intact can survive even if the vein is cut and replaced by a non-biological conduit (a polyethylene tube). A total of 13 dogs and 19 flaps were studied. The possible reasons for the survival of these flaps are discussed.

Animals↗

PubMed1987

Cephalic venous flap.

A case is reported in which an island fasciocutaneous flap from the radial side of the forearm, with only the cephalic vein connecting it to the rest of the body (Fig. 1) was successfully transposed to cover part of a defect on the ulnar side of the elbow. An earlier case in which such a venous flap was raised but not used for cover is also detailed. A brief discussion speculating on the way this flap survived without any arterial inflow and only proximal venous drainage is included.

Adult↗

PubMed1986

Successful detachment of cross-leg fasciocutaneous flaps on the tenth day: a report of 10 cases.

A series of 10 patients is presented in whom cross-leg fasciocutaneous flaps were detached on the tenth day without any subsequent complication or loss. All the flaps were designed with a distal fascial extension that might have helped neovascularisation of the flap. The paper also includes a description of the nature of the fasciocutaneous flap in the leg, comments on the neovascularisation of flaps and a brief analysis of the economics of a skin flap transfer.

Adolescent↗