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Anesthesia and surgery of ratites.

Veterinary practitioners should apply common principles of anesthesia and surgery used in domestic livestock to ratites. Routine procedures can be accomplished in the field or in a veterinary hospital, provided practitioners become familiar with response of ratites to sedation and anesthesia.

Anesthesia↗

Research training of surgical residents as studied from the Resident's Forum.

Participants in the Resident's Forum were surveyed to gain an appreciation of their impression of their research training. The vast majority believed that adequate resources and supervision had been available for their research. The resident generally was the principal investigator, the primary writer of the grant to fund the study, and developed the experimental design. Supervision was usually by a diplomate who took an active role in the project. Projects were funded by several different sources for widely varying amounts. The most common duration of the studies was more than 4 months, and most residents conducted at least one other study during their residency. Ninety per cent stated that the study and its presentation at the Resident's Forum increased their enthusiasm for research, in contrast to the less than one half who, at the start of their residency, were planning on doing research during their career.

Education, Graduate↗

A comparison of surgical training with live anesthetized dogs and cadavers.

Cadavers were compared with live anesthetized dogs for their effectiveness as models for surgical training of veterinary medical students. One group of students was trained using cadavers, and a peer group was trained using live anesthetized dogs. Both groups then performed an intestinal anastomosis using a live subject. The time to completion of the procedure was recorded. The anastomoses and celiotomy closures were evaluated. Each anastomosis was isolated and pressure tested. Reviewers blindly scored each surgical team's performance based on actual inspection of the surgical site and on viewing videotapes of the procedure. The participants' attitudes toward the use of live animals in teaching and research were documented before and after training. No statistically significant differences could be detected between the two groups. The results suggest that some substitution of cadavers for live dogs in surgical training might be feasible.

Abdominal Muscles↗

Evaluation of tension obtained by use of three knots for tying cerclage wires by surgeons of various abilities and experience.

OBJECTIVE: To compare tension of 3 cerclage wire knots tied by surgeons of various abilities and experience. DESIGN: Cross-sectional study. SAMPLE POPULATION: Participants and faculty at a postgraduate course in veterinary orthopedics. PROCEDURE: Subjects tied a cerclage of their choice on an instrumented tying stand that displayed the tension on a computer. Mean tensions in cerclage wires tied with twist, single loop, or double loop knots were compared. The relationship between level of surgeon experience and tension achieved was examined. RESULTS: 29 twist, 30 single loop, and 16 double loop wires were analyzed. Mean +/- SD tension for twist knots was significantly less than for single loop knots (82.3+/-46.1 vs 166.6+/-42.2 N, respectively). Double loop knots achieved significantly greater tension (392.0+/-116.6 N) than twist and single loop knots did, even though few participants had ever tied this knot previously. There was no correlation with experience of the participant. For twist knots, wiggling the wire during cutting and pushing the twist over to flatten it to the bone further reduced tension. CONCLUSIONS AND CLINICAL RELEVANCE: Cerclage applied with a twist knot does not compress fracture fragments as effectively as cerclage applied with single loop or double loop techniques. Because greater compression of fragments will improve the stability of a fracture, a surgeon should strive to maximize the tension in the cerclage that they use. Experience and abilities of the surgeon are not associated with ability to tie cerclage wires tightly.

Animals↗

Development of a teaching model for surgical endodontic access sites in the dog.

A dolicocephalic canine skull was used to develop a teaching and study model for surgical endodontic access sites of the maxillary and mandibular canine teeth, the maxillary fourth premolar and the mandibular first molar teeth. Coronal endodontic access sites were created, and endodontic files were inserted through the access preparation into the root canal system. The teeth were radiographed to determine the ideal surgical access points. Barium markers were placed over these points and each tooth was radiographed again to confirm the appropriate location of the marker. Surgical accesses to the apices were created by drilling through the barium markers and underlying bone. Following localization of the apices, apicoectomies were performed, exposing the apical portion of the pulp canal. The maxillary and mandibular canine teeth, the maxillary fourth premolar tooth, and the mandibular first molar tooth and surrounding bone were harvested from a similar dolicocephalic dog following euthanasia. The specimens were embedded in methylmethacrylate, sectioned, and mounted on slides to reveal the structures located around the surgical access sites.

Animals↗

Principles of treatment for soft tissue sarcoma.

Soft tissue sarcomas (STS) are mesenchymal tumors arising from connective tissue elements and are grouped together based on a common biologic behavior. The most common histologic types include malignant peripheral nerve sheath tumors (schwannoma and neurofibrosarcoma) "hemangiopericytoma," fibrosarcoma, and malignant fibrous histiocytoma. These tumors are relatively slow growing yet locally invasive with a high rate of recurrence following conservative management. Appropriate preoperative planning and aggressive surgical resection often result in long-term remission or cure. Identification and evaluation of resection margins are paramount in appropriate case management. The addition of radiotherapy after surgical resection can aid in remission for incompletely resected masses. Systemic chemotherapy for STS should be considered for high-grade tumors with a moderate metastatic potential. Potential prognostic factors include grade, resection margins, size, location, histologic type, and previous treatment, with grade and margins being the most important. Tumor types classified as STS that differ slightly in their presentation or treatment, including synovial cell sarcoma, rhabdomyosarcoma, liposarcoma, and vaccine-associated STS in cats, are discussed. Soft tissue sarcomas can be a frustrating disease to treat, but adherence to solid surgical oncology principles can greatly increase the odds of good disease control.

Animals↗