Biomedical subjects

S W Allen

Publications and source records attributed to S W Allen.

41 records · Page 3Linked to original sources

PubMedDate not supplied

Ventral approach to the pelvic canal in the female dog.

A ventral approach to the pelvic canal by bilateral pubic and ischial osteotomy was performed in five female dogs. The entire urogenital tract could be exposed and easily manipulated through this approach. All animals were ambulatory within 24 hours. Clinical union had formed in three of the four osteotomies by the time of euthanasia (months 2-4) in all animals. Incomplete union in some osteotomies indicated that exercise should be restricted for at least 4 months after the procedure. The procedure was determined to be clinically useful when wide exposure of the entire female urogenital tract is desired.

Animals↗

PubMedDate not supplied

Flexor carpi ulnaris (humeral head) muscle flap for reconstruction of distal forelimb injuries in two dogs.

OBJECTIVE: To describe the use of the humeral head of the flexor carpi ulnaris muscle as a rotational flap for reconstruction of distal antebrachial, carpal, and metacarpal injuries in two dogs. STUDY DESIGN: Description of clinical cases. RESULTS: Local rotation of the humeral head of the flexor carpi ulnaris muscle provided coverage of the carpal and carpometacarpal bones and joint structures exposed by soft tissue avulsion. CONCLUSIONS: The distal portion of the humeral head of the flexor carpi ulnaris muscle can be used as a local muscle flap. CLINICAL RELEVANCE: Early soft tissue coverage of large wounds to the carpal and metacarpal regions can be accomplished without resorting to a more technically difficult procedure, such as a free vascularized flap transfer.

Accidents, Traffic↗

PubMedDate not supplied

Tissue reactivity to poliglecaprone 25 in the feline linea alba.

OBJECTIVE: To use poliglecaprone 25 for all ligations and closure in routine feline ovariohysterectomies and evaluate maintenance of tissue approximation and tissue reaction to the suture. STUDY DESIGN: Prospective, descriptive study. ANIMALS: Twenty four female cats. METHODS: Ovariohysterectomies were performed in all cats. Abdominal incisions were inspected on days 1, 3, 7, 14, and 28 for dehiscence and swelling. All cats were euthanatized postoperatively, group 1 on day 7; group 2 on day 14; and group 3 on day 28. The peritoneal cavity was inspected for adhesions and all abdominal incisions were collected en bloc. Each linea alba was histologically evaluated and the inflammatory reaction was characterized. RESULTS: Dehiscence did not occur in any of the 24 cats. The incisional swelling on day 1 was significantly smaller than on day 7, and the swelling on day 14 was significantly smaller than on days 1, 3, and 7 (P < .05). Intra-abdominal adhesions were found in all groups with the greatest number associated with the peritoneum at the incision site. Tissue reactions in group 1 were pyogranulomatous or fibromononuclear, group 2 were granulomatous or fibromononuclear, and group 3 were pyogranulomatous, granulomatous, fibromononuclear or fibrous. Eosinophilic infiltration was seen in 3 of the 8 cats in group 1. CONCLUSIONS: Incisional swelling and inflammatory reactions seen with poliglecaprone 25 were consistent with those anticipated after implantation of suture in a surgically created wound. CLINICAL RELEVANCE: Poliglecaprone 25 appears to be an acceptable suture for use in feline ovariohysterectomy. It causes a relatively short-lived inflammatory response.

Abdomen↗

PubMedDate not supplied

Microcytosis and iron status in dogs with surgically induced portosystemic shunts.

Microcytosis is common in dogs with congenital portosystemic shunts (PSS) and acquired liver disease. The objective of this study was to determine if microcytosis could be induced in normal dogs by surgical creation of PSS, and to characterize the changes in hematology and iron status. Hematocrit, mean cell volume, mean cell hemoglobin, and mean cell hemoglobin concentration decreased linearly from 45.5%, 69.1 fL, 22.8 g/dL and 33.1% to 39.5%, 55.9 fL, 17.8 g/dL and 31.9%, respectively, 18 weeks after creation of PSS. The erythrocyte count did not change, but red cell distribution widths indicated a shift to a heterogenous population with decreased volume. Mean cell volume and mean cell hemoglobin decreased rapidly after induction of PSS and were significantly (P < .05) different from presurgery values within 2 weeks. Serum iron and copper concentrations and total iron binding capacity were decreased in dogs with PSS. Liver iron concentration doubled after creation of PSS, with the majority of stainable iron located in Kupffer cells. The changes in erythrocyte indices and measures of iron status in dogs with surgically induced PSS were similar to those in dogs with congenital PSS. Microcystosis developed rapidly in dogs after induction of PSS. These results indicate that iron deficiency was not the cause of microcytosis in these dogs.

Analysis of Variance↗

PubMedDate not supplied

Urogenital cytology and surgical decision making. A differential diagnostic approach to hematuria, stranguria, and prostatomegaly.

The purpose of this chapter is to discuss some of the common diagnostic dilemmas in veterinary medicine that relate to the urogenital tract. The problems include hematuria, stranguria, and prostatomegaly. The diagnostic workup is discussed specifically as it relates to cytologic techniques. Case examples are given to illustrate how the suggested diagnostic plan can be followed. Some of the pitfalls that can be encountered in diagnosing and treating these problems are also addressed.

Animals↗