Sarra Borne Lord UID 000493586 Week 13 Assignment: Case Study VETE 4325 CA Anesthesia and Surgical Nursing November 21, 2014 Mouse is a 7 month old, female, domestic short hair cat. She was presented to the hospital because she has entered her first heat cycle and her owners do not want her to become impregnated. Mouse is an indoor cat who is allowed out into the owner’s fenced yard and the owners have seen and heard evidence of suitors. At home Mouse is a friendly cat, not shy about seeking attention, and is of a normal activity level for her age. Her urination and defecation are reported to be normal, and there has been no vomiting or diarrhea. She has a good appetite. Her owners feed her Natural Choice Kitten dry free choice, with ¼ can of canned Kitten food twice daily. Mouse is up to date on her vaccinations, and is in otherwise good health. Even though performing an ovariohysterectomy while Mouse is in estrus will be more complicated, her owners feel that it is in her and their best interests to do the surgery now. The risks of the increased vascularity of the uterus and ovaries is explained thoroughly and they are willing to take the increased risk. Mouse will be hospitalized overnight, because she has eaten this morning, and the surgery will take place the following day. A physical examination reveals that Mouse is in good body condition with a BCS of 3/5. Temperature: 102.1 F Heart rate: 180 bpm Respiratory rate: 36 Weight: 4 kg Mucous membranes: pink Capillary refill time: <2 seconds The veterinarian orders pre-anesthetic blood work. A CBC, serum chemistry panel, and a coagulation panel. The veterinarian wants to be sure that Mouse’s clotting factors are normal before undertaking an in-heat spay. 1 Sarra Borne Lord UID 000493586 Week 13 Assignment: Case Study VETE 4325 CA Anesthesia and Surgical Nursing November 21, 2014 The CBC and coagulation panel are normal WBC: 6.2 Neutrophils: 78% RBC: 9.6 Lymphocytes: 20% HCT: 38% Monocytes: 2% PLT: 378 Blood smear: morphologically normal Prothrombin Time: 17 seconds The serum chemistry panel is also normal, although it does show a mild hyperglycemia which is attributed to the stress of handling. BUN: 16 mg/dL CREAT: 0.8 mg/dL PHOS: 3.2 mg/dL GLU: 200 g/dL TP: 5.9 g/dL ALB: 2.8 g/L T Bili: 0.3 mg/dL ALT: 25 u/L K: 3.6 mmol/L Na: 160 mmol/L Cl: 118 mmol/L Mouse is fasted overnight and a physical exam is done the following morning before surgery. Her physical parameters remain essentially unchanged. Resting temperature: 102 F Heart rate: 160 bpm Respiration rate: 36 bpm Weight: 4 kg Mucous membranes: pink Capillary refill time: <2 seconds Her glucose is checked again and with gentle handling and a sneaky ear prick instead of a jugular puncture it is a much more normal 116 g/dL. 2 Sarra Borne Lord UID 000493586 Week 13 Assignment: Case Study VETE 4325 CA Anesthesia and Surgical Nursing November 21, 2014 The veterinarian assigns Mouse to Risk Class P1 and requests that Mouse be premedicated with “kitty magic” which is a combination of ketamine 2.2 mg/kg, butorphanol 0.22 mg/kg and dexmedetomidine 0.11 mg/kg. Each drug is drawn up individually and then combined into a single syringe to be given as an intramuscular injection. The advantages of using “kitty magic” in young, healthy, P1 cats is that it provides good pre-surgical and intraoperative analgesia for short procedures, and that in many cases the cat may be able to be intubated and placed on gas anesthesia with the minimal use of an induction agent. “Kitty magic” is a combination of an opioid analgesic (butorphanol), a dissociative anesthetic (ketamine) which also provides analgesia, and an alpha-2-agonist (dexmedetomidine) that provides sedation, muscle relaxation and analgesia. This combination of drugs works synergistically, thus reducing the required dose of each individual drug required, and provides several different types of analgesia that block different types of pain pathways. An antiinflammatory agent will be provided post-operatively giving Mouse complete multi-modal pain control, and hopefully keeping her at a 0 on the Feline Acute Pain Scale throughout her procedure and recovery. Mouse is given her premedication injection and then is allowed to sit quietly in a cage in the prep room for 15 – 20 minutes while the medications take effect. After 17 minutes, Mouse is heavily sedated. A 22 g catheter is placed in her right cephalic vein, and warmed LRS is started at 3 ml/kg/hr (12 ml/hr). Her jaw tone is tested, and intubation appears possible without the use of further drugs. A small amount of lidocaine 20% injection (0.1 ml) is squirted on her laryngeal folds and after 60 seconds a lubricated 3.5 mm endotracheal tube is passed. The cuff is carefully inflated and Mouse is placed on isoflurane 2.5% and oxygen via an anesthetic machine. 3 Sarra Borne Lord UID 000493586 Week 13 Assignment: Case Study VETE 4325 CA Anesthesia and Surgical Nursing November 21, 2014 Mouse’s abdomen is shaved from her xiphoid process to her pubic bone and a surgical scrub is completed before she is moved into the surgical suite. The anesthetic technician attaches the surgical monitor to measure her ECG, heart rate, respirations, C02 & SP02 levels, blood pressure and temperature. An esophageal stethoscope is inserted to manually monitor her heart rate, and her upper body is covered in a hot air warming blanket. The veterinarian makes a midline incision that is slightly longer than that of a typical non-estrus spay. Mouse will need 3 or 4 skin sutures, rather than the usual subcuticular closure with a drop of skin glue. The uterus and ovaries are located, ligated and removed. Fortunately for Mouse, the surgery goes well and without any complications. From first incision to the final suture the entire operation is completed within 27 minutes. After completion of the last suture the veterinarian takes diluted bupivacaine (0.125%) and injects the area around the incision site to provide local analgesia. At this point, the isoflurane gas is turned off, but Mouse is provided with oxygen for an additional 5 minutes. Once Mouse is able to swallow she is extubated and her post-operative temperature is recorded at 100 F. Mouse is taken to the recovery area where her vital signs will be checked and recorded every 15 minutes for the next hour and the warmed intravenous fluids will be continued at a maintenance rate of 70 x (weight in kg)0.75 or 8 ml/hr until she is completely recovered. Mouse will be given a single postoperative injection of meloxicam SC at 0.1 mg/kg. Meloxicam is a non-steroidal anti-inflammatory drug that with a single pre or post-operative injection has been shown to provide analgesia for 24 hours. 4 Sarra Borne Lord UID 000493586 Week 13 Assignment: Case Study VETE 4325 CA Anesthesia and Surgical Nursing November 21, 2014 Mouse will be hospitalized overnight following surgery and will be released to her owners the next morning. The veterinarian and his technician do a brief physical exam before releasing her and notes that her vital signs are as follows: Rectal temperature: 101.8 F Heart rate: 160 bpm Respiratory rate: 36 bpm Weight: 3.99 kg Mucous membranes: pink Capillary refill time <2 sec Incision is clean and dry. Suture line is intact. Feline acute pain score: 0 Food is offered and Mouse is very interested. By the time the technician returns to check on her again, all of the offered meal has been consumed. Mouse is friendly and solicits attention from her caretaker. The veterinarian verbally gives the owners the following instructions, and also provides them in a handout format. POST-SURGICAL HOME CARE Mouse may be cranky, quiet or sensitive for 24-48 hours after surgery. These personality changes are due to the anesthesia and pain medications and will not continue for long. Take a look at the surgery site several times daily, it should be clean and dry with a minimal amount of puffiness. If there is swelling, redness or any missing sutures contact the vet immediately. The sutures will need to be removed in 10 days. Do not allow Mouse to lick the suture site. A soft e-collar has been sent home. Please put the “cone of shame” on Mouse if you must leave her alone for an 5 Sarra Borne Lord UID 000493586 Week 13 Assignment: Case Study VETE 4325 CA Anesthesia and Surgical Nursing November 21, 2014 extended period of time (such as going to work). She can eat, drink and attend to necessary bodily functions while wearing this collar. Monitor Mouse’s litterbox habits. She should be urinating and defecating normally within 24 hours after surgery. Keep your cat inside at least until the sutures are removed and the vet clears your cat to go outside. Keep physical activity to a minimum, no stressful play session. Your cat was given Metacam to manage pain following surgery. Metacam is an anti-inflammatory pain medication that works for 24 hours. If you take your cat to another vet in the next 30 days, please bring your dated post-surgical handout with you. Metacam can interact with other medications and it is important that any vet treating your cat knows when it was administered. Do not use any pain medications that were not prescribed by the vet. Most human pain killers are toxic to cats. If you feel that Mouse is painful, please call us and we will prescribe an oral pain medication (such as buprenorphine) that is safe for use in cats that will not interact with the Metacam. 6 Sarra Borne Lord UID 000493586 Week 13 Assignment: Case Study VETE 4325 CA Anesthesia and Surgical Nursing November 21, 2014 References Bryant, S. (Ed.). (2010). Anesthesia for veterinary technicians. Ames, Iowa: Blackwell Publications. Busch, S. (2006). Small animal surgical nursing: Skills and concepts. St. Louis, Missouri: Mosby. Davis, H., Jensen, T., Johnson, A., Knowles, P., Meyer, R., Rucinsky, R., & Shafford, H. (2013). 2013 AAHA/AAFP fluid therapy guidelines for dogs and cats. Journal of the American Animal Hospital Association, 49(3), 149-159. Hines, R. (2013). Normal feline & canine blood chemistry values. Retrieved from http://www.2ndchance.info/normaldogandcatbloodvalues.htm Plumb, D. (2011). Plumb's Veterinary Drug Handbook (Vol. 7). Ames, Iowa: WileyBlackwell. Thomas, J., & Lerche, P. (2011). Anesthesia and Analgesia for Veterinary Technicians (4 ed.). St. Louis, Missouri: Mosby Elsiver. 7