Treatment of a cystocele in a female dog 3 days after whelping.

A case of a cystocele is reported in a 3-year-old intact female Doberman pinscher. The urinary bladder and vaginal body were reduced within the abdominal cavity and secured by cystopexy and cervicopexy allowing the uterus and ovaries to be spared. This is the first report describing the surgery for a cystocele in a young female dog 3 days after whelping, with sparing of the reproductive tract. Key clinical message: This is the first report to describe a cystocele in a young intact female dog after whelping with sparing of the female reproductive tract.

Traitement d'une cystocèle chez une chienne 3 jours après la mise bas. Un cas de cystocèle est rapporté chez une femelle Doberman pinscher intacte de 3 ans. La vessie et le corps vaginal ont été réduits dans la cavité abdominale et sécurisés par cystopexie et cervicopexie permettant d'épargner l'utérus et les ovaires. Il s'agit du premier rapport décrivant la chirurgie d'une cystocèle chez une jeune chienne trois jours après la mise bas, avec préservation de l'appareil reproducteur.Message clinique clé :Il s'agit du premier rapport décrivant une cystocèle chez une jeune chienne intacte après mise bas avec préservation de l'appareil reproducteur femelle.(Traduit par Dr Serge Messier).

Assessment of laparoscopic working space in guinea pigs (Cavia porcellus) undergoing carbon dioxide insufflation at different intra-abdominal pressures.

OBJECTIVE: To evaluate pneumoperitoneal volumes (laparoscopic working space) in guinea pigs (Cavia porcellus) undergoing pneumoperitoneum via carbon dioxide insufflation at different intra-abdominal pressures (IAPs) (4, 6, and 8 mm Hg) and recumbencies (dorsal, right lateral, and left lateral). ANIMALS: Six 3- to 4-month-old sexually intact female Hartley guinea pigs. PROCEDURES: Guinea pigs were anesthetized, intubated, and had an abdominal insufflation catheter placed. A baseline abdominal CT scan was performed. Guinea pigs underwent insufflation, with each IAP given in a random order for 10 to 15 minutes with a washout period of 5 minutes between pressures. Abdominal CT scans were acquired at each IAP and at each recumbency. Pneumoperitoneal volumes were calculated using software. RESULTS: Increases in IAP increased working space significantly (P < .001). The 6- and 8-mm Hg pressures increased working space from 4 mm Hg by 7.3% and 19.8%, respectively. Recumbent positioning (P = .60) and body weight (P = .73) did not affect working space. Order of IAP had a significant (P = .006) effect on working space. One of the guinea pigs experienced oxygen desaturation and bradycardia at 6- and 8-mm Hg IAP. CLINICAL RELEVANCE: Although an increased working space occurred at 6 and 8 mm Hg compared to 4 mm Hg, further research is needed concerning the cardiovascular effects of pneumoperitoneum in guinea pigs to determine whether those higher IAPs are safe in this species. An IAP of 6 mm Hg can be considered for laparoscopic cannula placement, followed by a lower IAP for laparoscopic procedures.

Bilateral thoracic radiographs increase lesion detection in horses with pneumonia or pulmonary neoplasia but do not bring any additional benefit for inflammatory or diffuse pulmonary disease.

Published studies describing the effects of bilateral radiographic projections on the detection of equine pulmonary lesions are currently lacking. The objectives of this retrospective, single center, observational study were to compare unilateral and bilateral thoracic radiographic projections for the detection of pulmonary lesions in a group of horses. Based on their clinical diagnosis, 167 adults and foals with bilateral thoracic radiographs were classified as having pneumonia (n = 88), inflammatory or diffuse pulmonary disease (n = 72), and pulmonary masses (n = 7). After an initial interrater repeatability test, right-to-left and left-to-right projections were anonymized and independently interpreted by a radiologist blinded to the clinical diagnosis. Scores were attributed for each pattern/lesion (alveolar, interstitial, bronchial, nodules/masses, cavitary lesions) and each quadrant. Agreement between scores from each projection was evaluated with Bland-Altman plots. Lesions identified on one side but not on the contralateral projection were considered discordant. There was no preferential lateralization of pulmonary lesions. The prevalence of discordance was 14.4%, 9.0%, and 4.2% for alveolar pattern, nodules/masses, and cavitary lesions, respectively. Up to nine horses (10.2%) with pneumonia could have been misdiagnosed. A pulmonary mass would have been missed in one case. For inflammatory or diffuse disease, discordance was slight, and the addition of contralateral projections had no impact on radiographic interpretation. In conclusion, in horses with pneumonia or neoplasia, bilateral projections, or adding at least one contralateral caudoventral view, increased the probability of identifying pulmonary lesions. In horses with inflammatory or diffuse disease, bilateral thoracic radiography provided no additional benefit.

Development of renal adenocarcinoma in a ferret with renal cortical cysts (Mustela putorius furo).

CASE DESCRIPTION: A 5.5-year-old 0.929-kg spayed female domestic ferret (Mustela putorius furo) underwent serial abdominal ultrasonographic and clinicopathologic examinations after multiple renal cysts were detected bilaterally during a routine examination. CLINICAL FINDINGS: The ferret was apparently healthy at the start of the monitoring period and had no clinical signs for > 20 months. Four months after the initial examination, the largest cyst became increasingly mineralized; 17 months after detection, it had increased in size and become amorphous, and the ferret's plasma BUN concentration was mildly high. Within 21 months after the first visit, a nodule was detectable, and hydronephrosis developed in the kidney with the largest cyst. Findings for fine-needle aspirates from the nodule were consistent with renal carcinoma. TREATMENT AND OUTCOME: Contrast-enhanced CT revealed severe unilateral nephromegaly with no contrast uptake in the affected ureter. Following surgical removal of the affected kidney, histologic examination identified renal adenocarcinoma replacing the entire renal cortex and medulla. The ferret was euthanized postoperatively because of declining condition. On necropsy, metastasis to a mesenteric lymph node was identified; comorbidities included 2 other neoplasms and acute, severe injury of the contralateral kidney. CLINICAL RELEVANCE: Neoplastic transformation of a renal cyst was suspected in the ferret of this report on the basis of observed ultrasonographic changes over time and extensive infiltration of the neoplasm throughout the affected kidney. Renal cysts are linked to renal neoplasia in other species, and the findings for this patient supported the need for periodic monitoring of renal cysts in ferrets.

Hematuria in a 3-month-old filly with an internal umbilical abscess and internal iliac artery aneurysm.

A 3-month-old foal with a history of acute hematuria was evaluated. Hydronephrosis and hydroureter were visualized upon renal ultrasonography of the left kidney. Cystoscopy identified a blood clot occluding the left ureter. Computed tomography (CT) revealed a large retroperitoneal abscess at the level of the aortic bifurcation and a left internal iliac aneurysm. Due to the severity of the lesions and the poor prognosis, the filly was euthanized and the clinical findings were confirmed by post-mortem examination. This report emphasizes the value of obtaining a precise diagnosis via CT in order to avoid unviable treatment approaches when confronted with this unusual secondary complication of omphaloarteritis. Key clinical message: Umbilical complications are routinely diagnosed in equine neonatal medicine, and commonly lead to septicemia, physitis, and septic arthritis; severe internal umbilical abscessation, and subsequent vascular and urinary disorders are uncommon sequelae.

Hématurie chez une pouliche de 3 mois avec abcès ombilical interne et anévrisme de l'artère iliaque interne. Un poulain de 3 mois ayant des antécédents d'hématurie aiguë a été évalué. L'hydronéphrose et l'hydro-uretère ont été visualisés par échographie rénale du rein gauche. La cystoscopie a identifié un caillot sanguin obstruant l'uretère gauche. La tomodensitométrie (TDM) a révélé un gros abcès rétropéritonéal au niveau de la bifurcation aortique et un anévrisme iliaque interne gauche. En raison de la gravité des lésions et du mauvais pronostic, la pouliche a été euthanasiée et les résultats cliniques ont été confirmés par un examen post-mortem. Ce rapport souligne l'intérêt d'obtenir un diagnostic précis par TDM afin d'éviter des approches thérapeutiques non-viables face à cette complication secondaire inhabituelle de l'omphalo-artérite.Message clinique clé :Les complications ombilicales sont couramment diagnostiquées en néonatalogie équine et conduisent généralement à une septicémie, une épiphysite et une arthrite septique; un abcès ombilical interne sévère et des troubles vasculaires et urinaires subséquents sont des séquelles peu fréquentes.(Traduit par Dr Serge Messier).

Soft tissue sarcoma at the site of a previous laparoscopic-assisted gastropexy in a dog.

An 8-year-old, spayed female, Doberman pinscher dog was presented to the Ontario Veterinary College Health Sciences Center for evaluation of a large subcutaneous mass on the right cranial ventral abdomen. Computed tomography localized a 6 × 7 cm soft tissue mass to the site of a laparoscopic-assisted gastropexy performed 3 years earlier. Body wall resection with wide surgical margins was performed. Histological evaluation identified the mass as a grade III soft tissue sarcoma with clean surgical margins. To the authors' knowledge, this report is the first to detail a case of a soft tissue sarcoma that is suspected to have originated at and/or infiltrated into tissues that were previously incised during a surgical procedure. Key clinical message: Based on this case, there is a possibility of a clinical correlate to the feline injection site sarcoma in the canine species.

Sarcome des tissus mous au site d'une gastropexie aidée par laparoscopie antérieure chez un chien. Une chienne Doberman pinscher stérilisée âgée de 8 ans fut présentée au Health Sciences Center de l'Ontario Veterinary College pour évaluation d'une large masse sous-cutanée au niveau de l'abdomen ventral crânial droit. Une tomodensitométrie permis de localiser une masse de tissus mous de 6 × 7 cm au site d'une gastropexie aidée par laparoscopie effectuée 3 ans plus tôt. Une résection de la paroi corporelle avec de larges bordures chirurgicales fut réalisée. Une évaluation histologique identifia la masse comme étant un sarcome des tissus mous de grade III avec des bordures chirurgicales nettes. À la connaissance des auteurs ce rapport est le premier à détailler un cas de sarcome des tissus mous qui est suspecté avoir son origine et/ou avoir infiltré des tissus qui furent précédemment incisés durant une procédure chirurgicale.Message clinique clé:Sur la base de ce cas, il y a possibilité d'une relation clinique avec le sarcome du site d'injection chez le chat chez l'espèce canine.(Traduit par Dr Serge Messier).

Laparoscopic ureteronephrectomy for the treatment of giant kidney worm infection in 2 dogs.

One male and one female dog were presented with giant kidney worm infection in the right kidney. Infection was identified through visualization of intra-renal Dioctophyme renale on abdominal ultrasound. Both dogs underwent right-sided laparoscopic ureteronephrectomy for treatment of the giant kidney worm infection. Additional adult worms were extirpated from the peritoneal cavity of both dogs. Both dogs recovered without complication from anesthesia and surgery and were discharged within 24 hours after surgery. Laparoscopic ureteronephrectomy has not previously been described for the treatment of giant kidney worm infection in North America.

Urétéro-néphrectomie laparoscopique pour le traitement d'une infection par le ver géant du rein chez deux chiens. Un chien mâle et un chien femelle furent présentés avec une infection par le ver géant du rein dans le rein droit. L'infection fut identifiée par visualisation de Dioctophyme renale intra-rénal par échographie abdominale. Les deux chiens furent soumis à une urétéro-néphrectomie laparoscopique pour le traitement de l'infection par le ver géant du rein. Des vers adultes additionnels furent retirés de la cavité péritonéale des deux chiens. Les deux chiens ont récupéré sans complication de l'anesthésie et de la chirurgie et ont obtenu leur congé en moins de 24 h après la chirurgie. L'urétéro-néphrectomie laparoscopique n'avait pas encore été décrite en Amérique du Nord pour le traitement de l'infection par le ver géant du rein.(Traduit par Dr Serge Messier).

In vitro elution of amikacin and Dispersin B from a polymer hydrogel.

OBJECTIVE: To characterize the in vitro elution of amikacin and Dispersin B (ß-N-acetylglucosaminidase) in a degradable hydrogel. STUDY DESIGN: In vitro, prospective study. METHODS: Amikacin (group A; 40 mg/mL), Dispersin B (group D; 70 µg/mL), or combined amikacin and Dispersin B (group AD; 40 mg/mL and 70 µg/mL, respectively) were added to a hydrogel. Ten aliquots per group were incubated in phosphate-buffered saline that was exchanged at 1, 4, 8, 12, and 24 hours and then once daily for 10 days. Eluted amikacin and Dispersin B were quantitated by using an amikacin reagent kit and a Dispersin B enzyme-linked immunosorbent assay kit, respectively. Time point drug concentrations were compared between groups by using repeated-measures analysis of variance, and total drug elution was compared by using an area under the curve calculation. RESULTS: Amikacin alone, Dispersin B alone, and amikacin and Dispersin B combined together underwent rapid elution in the first 24 hours, followed by a gradual decrease over 10 days. The concentration of Dispersin B eluted in group D was higher at 1 day and lower from day 5 to day 10 compared with that in group AD. The concentration of amikacin eluted in group A was higher at 1, 4, and 8 hours and on day 10 and lower on day 1 compared with that in group AD. The total elution of amikacin was greater from group AD compared with that from group A (P = .02). CONCLUSION: Combining amikacin and Dispersin B had an affect on the total elution of amikacin but not Dispersin B. CLINICAL SIGNIFICANCE: The combination of amikacin and Dispersin B in a degradable hydrogel could allow local treatment of complex infections without the requirement for multiple invasive procedures.

Effects of intra-abdominal pressure on laparoscopic working space in domestic rabbits (Oryctolagus cuniculus).

OBJECTIVE: To assess the effects of 3 intra-abdominal pressures (IAPs) on pneumoperitoneal (laparoscopic working space) volume in domestic rabbits (Oryctolagus cuniculus). ANIMALS: 6 female New Zealand White rabbits. PROCEDURES: A Latin-square design was used to randomly allocate sequences of 3 IAPs (4, 8, and 12 mm Hg) to each rabbit in a crossover study. Rabbits were anesthetized, subumbilical cannulae were placed, and CT scans were performed to obtain baseline measurements. Each IAP was achieved with CO2 insufflation and maintained for ≥ 15 minutes; CT scans were performed with rabbits in dorsal, left lateral oblique, and right lateral oblique recumbency. The abdomen was desufflated for 5 minutes between treatments (the 3 IAPs). Pneumoperitoneal volumes were calculated from CT measurements with 3-D medical imaging software. Mixed linear regression models evaluated effects of IAP, rabbit position, and treatment order on working space volume. RESULTS: Mean working space volume at an IAP of 8 mm Hg was significantly greater (a 19% increase) than that at 4 mm Hg, and was significantly greater (a 6.9% increase) at 12 mm Hg than that at 8 mm Hg. Treatment order, but not rabbit position, also had a significant effect on working space. Minor adverse effects reported in other species were observed in some rabbits. CONCLUSIONS AND CLINICAL RELEVANCE: A nonlinear increase in abdominal working space was observed with increasing IAP. Depending on the type of procedure and visual access requirements, IAPs > 8 mm Hg may not provide a clinically important benefit for laparoscopy in rabbits.

Modeling and Staging of Osteoarthritis Progression Using Serial CT Imaging and Arthroscopy.

OBJECTIVE: The objective of this study was to describe in life methods by which osteoarthritis can be staged in order to time therapeutic interventions that are relevant to osteoarthritis (OA) clinical trials. METHODS: Twenty-two sheep underwent arthroscopic meniscal destabilization to induce OA. Serial computed tomography (CT) imaging and arthroscopy were used to monitor osteoarthritis progression at 3-month intervals over 9 months. Eleven sheep received 1 intra-articular injection of hyaluronate 3 months after OA induction and another group of 11 received saline. A linear mixed model was used to define the trajectory of shape change in the medial joint compartment. Ordinal logistic regression was used to investigate the association between morphological changes and sclerosis. RESULTS: Three months after meniscal destabilization there were early bipolar chondral lesions in the medial compartment of the knee, as well as osteophytes and bone remodeling. Superficial fissures and cartilage cracks progressed to discrete areas of cartilage thinning and fibrillation on the medial tibial plateau by 6 months that became cartilage erosions by nine months. A linear mixed effect model demonstrated significant change in medial compartment length and width with over time (P < 0.05) for both groups. A significant association between severity of sclerosis and medial compartment morphology was also observed. CONCLUSIONS: The induction of osteoarthritic lesions with meniscal release model can be followed using noninvasive and minimally invasive procedures allowing for real-time decisions about redosing therapies, or other changes such as extending trial timelines without sacrificing animals to conduct assessments.

Evaluation of minimally invasive small intestinal exploration and targeted abdominal organ biopsy with use of a wound retraction device in dogs: 27 cases (2010-2017).

OBJECTIVE: To describe surgical technique, biopsy sample quality, and short-term outcome of minimally invasive small intestinal exploration and targeted abdominal organ biopsy (MISIETB) with use of a wound retraction device (WRD) in dogs. ANIMALS: 27 client-owned dogs that underwent MISIETB with a WRD at 1 of 4 academic veterinary hospitals between January 1, 2010, and May 1, 2017. PROCEDURES: Medical records were retrospectively reviewed, and data collected included signalment; medical history; findings from physical, ultrasonographic, laparoscopic, cytologic, and histologic evaluations; surgical indications, procedures, duration, and complications; and short-term (14-day) outcomes. The Shapiro-Wilk test was used to evaluate the normality of continuous variables, and descriptive statistics were calculated for numeric variables. RESULTS: Laparoscopic exploration was performed through a multicannulated single port (n = 18), multiple ports (5), or a single 6-mm cannula (4). Median length of the incision for WRD placement was 4 cm (interquartile [25th to 75th percentile] range, 3 to 6 cm). All biopsy samples obtained had sufficient diagnostic quality. The 2 most common histologic diagnoses were lymphoplasmacytic enteritis (n = 14) and intestinal lymphoma (5). Twenty-five of 27 (93%) dogs survived to hospital discharge, and 3 (12%) dogs had postsurgical abnormalities unrelated to surgical technique. CONCLUSIONS AND CLINICAL RELEVANCE: Results indicated that MISIETB with WRD was an effective method for obtaining diagnostic biopsy samples of the stomach, small intestine, pancreas, liver, and mesenteric lymph nodes in dogs. Prospective comparison between MISIETB with WRD and traditional laparotomy for abdominal organ biopsy in dogs is warranted.

Gallbladder leiomyoma treated by laparoscopic cholecystectomy in a dog.

CASE DESCRIPTION: A 12-year-old spayed female Chinese Crested was referred because of a mass detected in the gallbladder during ultrasonographic evaluation of the abdomen, which had been prompted by a history of high serum liver enzyme activities. CLINICAL FINDINGS: Serum biochemical analysis revealed mild hypoglobulinemia and high alkaline phosphatase, γ-glutamyltransferase, and alanine aminotransferase activities. Abdominal ultrasonography revealed diffuse hepatopathy and multiple pedunculated mucosal structures within the gallbladder. TREATMENT AND OUTCOME: Following initial treatment with ursodiol (11.4 mg/kg [5.18 mg/lb], PO, q 12 h) and S-adenosylmethionine (30 mg/kg [13.6 mg/lb], PO, q 24 h) for 1 month to address possible cholestasis, no change was noted in ultrasonographic or serum biochemical findings. Consequently, laparoscopic cholecystectomy was performed concurrently with laparoscopic liver biopsy. Histologic evaluation of resected gallbladder tissue and the liver biopsy specimen revealed evidence of multifocal to coalescing leiomyomas of the gallbladder and multifocal lipogranulomas of the liver. Eleven days after the dog was discharged from the hospital, it was taken to an emergency clinic because of anorexia, vomiting, and diarrhea. Mild pancreatitis or gastroenteritis was suspected, supportive treatment was provided, and ursodiol and S-adenosylmethionine administration was reinitiated. At the time of follow-up telephone contact with the owner 234 days after surgery, the dog continued to receive ursodiol and S-adenosylmethionine and had no clinical signs associated with hepatobiliary disease. CLINICAL RELEVANCE: Leiomyomas, although rare, can develop in dogs and should be considered as a differential diagnosis for intramural gallbladder lesions. Laparoscopic cholecystectomy served as a minimally invasive surgical treatment for this benign neoplasia.

Multiple fractures and luxations of palatofacial bones in a hawk-headed parrot (Deroptyus accipitrinus).

CASE DESCRIPTION A 16-year-old female hawk-headed parrot (Deroptyus accipitrinus) was evaluated because of beak trauma and difficulty eating. CLINICAL FINDINGS Physical examination revealed a lateral tissue protrusion in the left half of the oropharyngeal cavity ventral to the proximal aspect of the maxillary tomium as well as a small bony prominence on the left jugal arch. Range of motion of the beak appeared normal. A CT scan of the skull revealed rostroventral displacement of the left palatine bone from the maxilla and left lateral subluxation and lateral luxation of the pterygoid-parasphenoid-palatine complex and pterygoid-palatine articulation, respectively; and transverse fractures of the ipsilateral pterygoid bone, jugal arch, and palatine bone. TREATMENT AND OUTCOME Palatine bone displacement was reduced, and surgical fixation was achieved with an interfragmentary wire inserted through the rostral aspect of the affected palatine bone, maxilla, and rhinotheca. The lateral aspect of the wire was covered with dental acrylic. The wire was removed 2 weeks later owing to concerns over local vascular compromise and potential for infection. The bird started eating pelleted food approximately 3 months after surgery; full return of apparently normal beak function was regained by 10 months after surgery. CLINICAL RELEVANCE To the authors' knowledge, the described beak trauma and surgical approach have not previously been reported for Psittaciformes. Use of CT imaging was invaluable in diagnosing multiple traumatic bone abnormalities and planning surgical correction.

Computed Tomography and Biomechanical Comparison between Trans-Articular Screw Fixation and 2 Polymethylmethacrylate Cemented Constructs for Ventral Atlantoaxial Stabilization.

OBJECTIVES: Canine ventral atlantoaxial stabilization methods have been constantly evolving over the past few decades. Yet, proper experimental data comparing the feasibility and biomechanical properties of currently available surgical options are lacking. The aims of this study were (1) to describe and compare the safety profiles and biomechanical properties of three ventral atlantoaxial stabilization methods; and (2) to test whether recently reported optimal implant definitions constitute reasonable guidelines. METHODS: Three types of atlantoaxial stabilization including trans-articular screw fixation (TSF) and two cemented constructs (MI5 and MI6) were performed in 21 Beagle cadavers. Post-surgical computed tomography (CT) images of the constructs and biomechanical data were then generated and statistically analysed. RESULTS: The CT data revealed that TSF achieved significantly better apposition than cemented constructs. Out of 91 screws positioned, 4.4% were graded as dangerous and 86.8% as optimal. Optimal positioning was most challenging to obtain for mono-cortical screws. Analysis of biomechanical data suggested that all three techniques could likely achieve similar rates of atlantoaxial fusion when submitted to physiological loads but also that cemented constructs were less prone to failure compared with TSF. CLINICAL SIGNIFICANCE: This study provides evidence that all three techniques are technically feasible and biomechanically viable but also that the evaluated surgical guidelines could be improved.

Investigating the impact of innate dexterity skills and visuospatial aptitude on the performance of baseline laparoscopic skills in veterinary students.

OBJECTIVE: To determine if manual dexterity and visuospatial skills can be used to predict baseline laparoscopic surgery skills in veterinary students. STUDY DESIGN: Pilot study. METHODS: Veterinary students (n = 45) from years 1-4 volunteered for this study. An hour-long electronic questionnaire was completed by participants. The first section was used to collect demographics and information about prior nonsurgical experiences. The second section included 3 tests of visuospatial skills, including the Purdue Visualization of Rotations Test, Mental Rotations Test, and Raven's Advanced Progressive Matrices Test. Multiple tests were administered to assess innate dexterity, including the grooved pegboard test, indirect and direct zigzag tracking tests, and the 3Dconnexion proficiency test. Each dexterity test was performed once with the left hand and once with the right hand. The order of task performance was randomized. Basic laparoscopic skills were assessed using the validated fundamentals of laparoscopic surgery (FLS) peg transfer task. RESULTS: There was an association between left-handed grooved pegboard scores (95% CI -10046.36 to -1636.53, P-value = .008) and left-handed indirect zigzag tracking task (95% CI -35.78 to -8.20, P-value = .003) with FLS peg transfer scores. Individuals who reported playing videogames achieved higher scores on the FLS peg transfer task than those without videogame experience (95% CI 583.59 to 3509.97, P-value = .007). CONCLUSION: The results of this study suggest that dexterity was a better predictor of baseline laparoscopic skills than visuospatial skills in veterinary students.

INTRAOPERATIVE IMAGE NAVIGATION: EXPERIMENTAL STUDY OF THE FEASIBILITY AND SURGEON PREFERENCE BETWEEN A STERILE ENCASED NINTENDO WIITM REMOTE AND STANDARD WIRELESS COMPUTER MOUSE.

Diagnostic imaging plays an important role in the operating room, providing surgeons with a reference and surgical plan. Surgeon autonomy in the operating room has been suggested to decrease errors that stem from communication mistakes. A standard computer mouse was compared to a wireless remote-control style controller for computer game consoles (Wiimote) for the navigation of diagnostic imaging studies by sterile personnel in this prospective survey study. Participants were recruited from a cohort of residents and faculty that use the surgical suites at our institution. Outcome assessments were based on survey data completed by study participants following each use of either the mouse or Wiimote, and compared using an analysis of variance. The mouse was significantly preferred by the study participants in the categories of handling, accuracy and efficiency, and overall satisfaction (P <0.05). The mouse was preferred to both the Wiimote and to no device, when participants were asked to rank options for image navigation. This indicates the need for the implementation of intraoperative image navigation devices, to increase surgeon autonomy in the operating room.

Canine atlantoaxial optimal safe implantation corridors - description and validation of a novel 3D presurgical planning method using OsiriX™.

BACKGROUND: Canine ventral atlantoaxial (AA) stabilization is most commonly performed in very small dogs and is technically challenging due to extremely narrow bone corridors. Multiple implantation sites have been suggested but detailed anatomical studies investigating these sites are lacking and therefore current surgical guidelines are based upon approximate anatomical landmarks. In order to study AA optimal safe implantation corridors (OSICs), we developed a method based on computed tomography (CT) and semi-automated three-dimensional (3D) mathematical modelling using OsiriX™ and Microsoft®Excel software. The objectives of this study were 1- to provide a detailed description of the bone corridor analysis method and 2- to assess the reproducibility of the method. CT images of the craniocervical junction were prospectively obtained in 27 dogs and our method of OSIC analysis was applied in all dogs. For each dog, 13 optimal implant sites were simulated via geometrical simplification of the bone corridors. Each implant 3D position was then defined with respect to anatomical axes using 2 projected angles (ProjA). The safety margins around each implant were also estimated with angles (SafA) measured in 4 orthogonal directions. A sample of 12 simulated implants was randomly selected and each mathematically calculated angle was compared to direct measurements obtained within OsiriX™ from 2 observers repeated twice. The landmarks simulating anatomical axes were also positioned 4 times to determine their effect on ProjA reproducibility. RESULTS: OsiriX could be used successfully to simulate optimal implant positions in all cases. There was excellent agreement between the calculated and measured values for both ProjA (ρc = 0.9986) and SafA (ρc = 0.9996). Absolute differences between calculated and measured values were respectively [ProjA = 0.44 ± 0.53°; SafA = 0.27 ± 0.25°] and [ProjA = 0.26 ± 0.21°; SafA = 0.18 ± 0.18°] for each observer. The 95 % tolerance interval comparing ProjA obtained with 4 different sets of anatomical axis landmarks was [-1.62°, 1.61°] which was considered appropriate for clinical use. CONCLUSIONS: A new method for determination of optimal implant placement is provided. Semi-automated calculation of optimal implant 3D positions could be further developed to facilitate preoperative planning and to generate large descriptive anatomical datasets.

Ventral rhinotomy in a pet rabbit (Oryctolagus cuniculus) with an odontogenic abscess and sub-obstructive rhinitis.

A rabbit was presented for severe dyspnea and was diagnosed with an odontogenic abscess obstructing the rostral nasopharynx using CT scan and oral endoscopy. The offending tooth was extracted intraorally, but due to persistent dyspnea, an endoscopic-guided ventral rhinotomy was performed. The dyspnea subsequently resolved, but the rabbit died 5 weeks later from a seemingly unrelated cause.

Rhinotomie ventrale chez un lapin de compagnie(Oryctolagus cuniculus)atteint d'un abcès odontogène et d'une rhinite causant une subocclusion. Un lapin a été présenté pour une dyspnée grave et a été diagnostiqué avec un abcès odontogène bloquant le nasopharynx rostral par tomodensitométrie et endoscopie orale. La dent en cause a été extraite intra-oralement, mais, en raison d'une dyspnée persistante, une rhinotomie ventrale guidée par endoscopie a été réalisée. La dyspnée s'est subséquemment résorbée, mais le lapin est mort 5 semaines plus tard d'une cause apparemment non reliée.(Traduit par Isabelle Vallières).

Portomesenteric venous gas in a 2-week-old Holstein calf.

A 2-week-old Holstein Friesian female calf was presented with profuse diarrhea and abdominal distension. Clinicopathological findings included marked hypoproteinemia, hypoglycemia and leucopenia, mild hyperlactatemia, and hyperfibrinogenemia. On abdominal ultrasonography, features were consistent with portomesenteric venous gas (PVG), a rare condition reported in the medical literature. The PVG in this calf was associated with severe gastrointestinal illness and sepsis.

Gaz veineux porto-mésentérique chez un veau Holstein âgé de 2 semaines. Une génisse Holstein-Friesian âgée de 2 semaines a été présentée avec une diarrhée abondante et une distension abdominale. Les résultats clinicopathologiques ont inclus de l'hypoprotéinémie, de l'hypoglycémie et de la leucopénie marquées ainsi qu'une hyperlactatémie et une hyperfibrinogénémie légères. À l'échographie abdominale, les caractéristiques étaient conformes à du gaz veineux portomésentérique (GVP), une affection rare signalée dans la littérature médicale. Le GVP de ce veau était associé à une maladie gastrointestinale et à une septicémie graves.(Traduit par Isabelle Vallières).