Biomedical subjects
Publications and source records attributed to J Bellamy.
A malignant neoplastic process originating from gall bladder epithelium was diagnosed in a 14-year-old, spayed female, domestic shorthair cat. The tumor produced widespread pulmonary and lymphatic metastases. The clinical and pathological manifestations are described. Neoplasia arising from the gall bladder epithelium is rarely reported in animals.
We observed two cases of autonomous intrathoracic goiter in patients with no past history of thyroidectomy. After resection, the surgical specimens confirmed the non-malignant nature of the goiter. We discuss the literature on management of autonomous intrathoracic goiter.
An unusual case of impaction colic caused by the ingestion of large quantities of gravel. The clinical presentation, surgical findings, and outcome are described.
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Chylothorax is a rare complication of thoracic surgery. The chyle leak can induce serious metabolic and immunological disorders. The ideal treatment of chylothorax has not been clearly established, and opinions are still divided between medical treatment and early or late surgical reoperation after prolonged medical treatment. Out of a total of 1.750 thoracic operations performed at the Centre Chirurgical du Val d'Or over the last 10 years, six cases of chylothorax were reoperated early, an average of five days after the initial operation. The chyle leak was easy to localize in every case. The second operation was performed via the same initial incision. All six patients has an uneventful postoperative course and only one case had a persistent chyle leak which gradually resolved. The mean total hospital stay was 18 days. No systemic infections or deaths were recorded. Early reoperation avoids the complications of prolonged medical treatment, is technically easy and decreases the length of hospital stay.
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A patient with bronchogenic cancer underwent right pneumonectomy. Surgical and infectious criteria were normal during the postoperative period when immediate postoperative severe hypoxeamia occurred. Pure oxygen only incompletely corrected the situation. Transoesophageal echocardiography with injection of microbulles for contrast imaging demonstrated a right-left shunt due to an open foramen ovale. Reopening the foramen ovale is rare but well documented complication of pneumonectomy. The pathogenics is still debated since hyperpressure in the right atria usually is not present. Echocardiography with contrast test is the best means of making the diagnosis.
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This study was performed to investigate the effects of holmium:yttrium-aluminum-garnet (Ho:YAG) laser energy on articular cartilage and subchondral bone adjacent to traumatically created cartilage lesions in a continuous weight-bearing model. The 2.1-microns wavelength was delivered efficiently and precisely in hand-controlled contact and near-contact hard tissue arthroscopic surgery in a saline medium. Bilateral arthroscopy was performed on normal antebrachiocarpal and intercarpal joints of four adult horses. One hundred twenty traumatic lesions were created on three weight-bearing articular surfaces with a knife, curet, or motorized burr. Depths of the lesions were partial and full thickness. Configurations of the lesions were lacerations, scrapes, and craters. Left limbs were used as controls. Right limb lesions were treated with various intensities of laser energy: 0.1. 0.16, and 0.2 J. Animals were killed at intervals of 1, 3, and 8 weeks. Gross microscopic anatomy was documented, and tissue sections were subjected to blind review by a pathologist. Mankin grading for cellularity and proteoglycan content was used to qualitatively evaluate cartilage response. Cartilage adjacent to all lesions exposed to laser energy had better cellularity and proteoglycan content (p < 0.05) than did corresponding controls by Mankin grading. Mankin grades for levels of 0.16 and 0.2 J were lower (p < 0.05) than were those of controls or lesions exposed to 0.1 J. There was loss of cellularity and necrosis in subchondral bone at higher energy levels (0.16 and 0.2 J). This study examined the effects of Ho:YAG laser on articular cartilage and subchondral bone in terms of depth of damage and healing response over time in a weight-bearing model. Additional research to define dose-response curves for Ho:YAG laser treatment of cartilage and subchondral bone are indicated.