Cooper, a 3-year-old male-neutered Golden Retriever (dog), p…

Cooper, a 3-year-old male-neutered Golden Retriever (dog), presents for vomiting, lethargy, and anorexia of 2 days duration. Two-view abdominal radiographs (below) reveal cloth-like material in the stomach. The owner would like to proceed with surgery to remove the cloth material. On physical exam, the patient is quiet and depressed, only rises with significant encouragement, has normal bronchovesicular sounds in all lung fields, no heart murmurs or arrhythmias, mucus membranes are pink and tacky with a capillary refill time of 3 seconds, peripheral pulses are weak, and the abdomen is tense on palpation. Blood has been collected for blood work and an intravenous catheter has been placed without the need for prior sedation. The following vitals and blood work results are available: Heart Rate: 150 beats/minuteRespiratory Rate: 20 breaths/minuteTemperature: 100.5 FPacked Cell Volume: 55%Total Plasma Protein: 8.5 g/dLSodium: 155 mmol/L (normal reference range 140 – 150)Potassium: 3.6 mmol/L (normal reference range 3.4 – 4.9)Chloride: 113 mmol/L (normal reference range 112 – 120)Blood Urea Nitrogen (BUN): 50 mg/dL (normal reference range 8 – 35)Creatinine: 2.0 mg/dL (normal reference range 0.8 – 1.5)Glucose: 90 mg/dL (normal reference range 60 – 120) What is the best next step in Cooper’s care plan?

After tracheal intubation of a 15 kg Mixed breed dog using a…

After tracheal intubation of a 15 kg Mixed breed dog using a properly sized, cuffed endotracheal tube and connecting to a rebreathing system, the anesthetist notices that the reservoir bag does not move with every patient’s breath. What is the most appropriate next step in this scenario?

Now consider an opioid for analgesia (or antinociception) fo…

Now consider an opioid for analgesia (or antinociception) for Cooper, the cloth eater in the previous question. Hydromorphone, buprenorphine and butorphanol are available. Which of these opioids has the potential to provide the greatest analgesia (or antinociception) and thus would be most appropriate to be administered intravenously before surgery?