February 27, 2020

Maintenance Fluids

Previously, we discussed the components of a fluid therapy plan and talked about hydration deficits. This week I want to touch on maintenance fluids. Maintenance rates are typically calculated using the following formulae: ml/day = 80 × bodyweight (kg)0.75 (cats) ml/day = 132 ×bodyweight (kg)0.75 (dogs) or ml/day = 30 × bodyweight (kg) + 70 These formulae better estimate the needs of smaller and larger patients. The flat 3ml/kg/hr underestimates for small patients and overestimates for larger patients. This maintenance rate is in addition to rehydration rates. So what sort of fluid should you use for maintenance? True “maintenance” crystalloids: used to replace ongoing fluid and electrolyte […]
October 20, 2019

GDV Diagnosis: All Hands on Deck

Gastric dilatation-volvulus (GDV) is a true veterinary emergency and while it can be daunting to be presented with a sick dog with suspected GDV, the most important thing to remember is this patient will succumb to this condition without your intervention. First, a little pathophysiology: GDV is a broad term that can refer to gastric dilation on its own, gastric dilation with volvulus, and even chronic gastric volvulus. These conditions usually present in large or giant breeds and we still know little about the underlying causes. Once dilation and volvulus occurs, perfusion to the stomach and other abdominal organs is […]
September 13, 2019

Dystocia Part 2 – Surgical or Medical Management

Part two of this series will cover when medical management is suitable or when surgical intervention is required. To start with, a few things indicate an immediate caesarean section is required: Signs of fetal distress (for example, bradycardia) Maternal exhaustion and more than four fetuses remaining Systemically unwell bitch/queen Fetal obstruction of the vaginal vault that is unmovable Excessive bleeding Half an hour of intense contractions without delivering a neonate Radiographic evidence of a disproportionately large fetus or abnormal position MEDICAL MANAGEMENT Generally, successful medical therapy is dependent on positive feathering response. Oxytocin therapy If strong contractions are occurring, oxytocin […]
August 16, 2019

Dystocia Part 1 – Labour Stages & Diagnostics

Now most female canine patients are spayed; it comes as no surprise reproductive emergencies are not as common. One area of confusion seems to be not knowing how to determine a true dystocia emergency from the process of normal partuirition, especially when having discussion over the phone with an owner who’s pet is going through the process. Another concern is what diagnostic pathway to follow to determine the cause of dystocia, especially for reasons other than obvious physical abnormalities (for example, fetopelvic disparity and fetal malposition). Often, once we decide to go down the medical treatment pathway, whether the result […]
August 6, 2019

Abdominal Radiography – Tips For Image Interpretation

Abdominal radiographs can be daunting, but here are six tips to help you get the most information from your studies and some tips on interpreting those images. Patient preparation Have the patient prepared as best as possible, have them dry as wet hair shows up on x-rays and appropriately sedated, or anaesthetised if needed, to minimise the amount of radiation exposure to you and your staff. 2.  Adjust according to depth Adjust the settings based on the depth. The cranial abdomen is often wider and deeper than the caudal abdomen, so adjust the settings as appropriate. This will help make sure the […]
October 25, 2018

Perfusion Deficits and Fluid Resuscitation: A More In-depth Look

Previously we discussed the four basic components of a fluid therapy plan – perfusion deficit, hydration deficit, maintenance requirements and ongoing losses. Let’s consider perfusion deficits. As an emergency clinician, correcting perfusion deficits is a crucial part of stabilising a patient. So what is a perfusion deficit? It either refers to a real or relative loss of intravascular fluid volume, or low blood pressure, leading to a decrease in perfusion of tissues and, ultimately, decreased oxygen delivery – ie, shock. What does this look like clinically?                 Clinical signs of perfusion deficits include: pale gums […]
June 20, 2018

Five Things I Wish I Could Tell Myself When Starting Uni

We all sometimes wish we could go back in time or have a do-over on some situations, University is such an important time in our lives, and often when we look back with hindsight and more life experience we wish we could have done things a little differently, or perhaps focused our time and energy in a better way. I have been reflecting recently as my career has progressed, and whilst I am incredibly proud of what I have achieved and where my journey has bought me, if I could say 5 things to the Gerardo Poli about start University, […]
January 31, 2018

Intoxications: Phone Conversations Part 2

Building on from last week’s blog on telephone advise, this is what I advise that owners can do at home if they have been exposed to a toxin. The main routes of exposure are ocular, dermal and gastrointestinal. Ocular Acids and alkalis cause the most severe effects as they can cause ongoing damage sometime after initial contact. Eye irrigation (avoid contact lens solution as this can cause further irritation) Tepid water, saline or distilled water 20 to 30 minutes (ideally) Rinse from medial to lateral to avoid contamination of the other eye Once the eye(s) have been flushed, then recommend […]
January 25, 2018

Intoxications: Phone Conversations

We frequently field phone calls from owners who are concerned about their pets being intoxicated or having access to a toxic compound. These are the list of questions I ask always owners: What is your pet doing? The main reason I ask this question first is to determine if the pets life is in danger. If the pet is seizing, collapsed, neurological, bleeding or having difficulty breathing then they need to come down immediately. What lead to the suspicion of toxic exposure? This can help provide useful background information. What is the product? In some situations owners can tell you […]
December 12, 2017

Christmas Dangers!

Christmas can be a very busy time for veterinary clinics; here are a list of common intoxications and conditions to keep an eye out on during this festive period. Chocolate There are numerous online calculators to determine whether a toxic dose has been consumed – they are a great place to start I always perform emesis in patients that have ingested chocolate even hours after ingestion as often large amounts can reside in the stomach Remember that cardiac arrhythmias can also occur in clinically normal looking patients so perform an ECG The toxic components can be reabsorbed through the bladder […]
November 15, 2017

PCV/TP – How To Get The Most Out of This Simple Test

The packed cell volume (PCV) and total protein (TP) is a simple yet informative laboratory test, but one that is often misinterpreted or under-utilised. It is important to remember that all test results need to be interpreted in the light of the patient’s history, presenting clinical signs and general physical examination findings. Below is a table of the various changes that can be found on a PCV/TP and the possible causes of these changes. Many of the differentials can be include or excluded based on the history, clinical signs and examination findings. I would like to highlight some common misconceptions […]
September 27, 2017

GDV: The Recovery

Postoperatively, gastric dilatation-volvulus (GDV) patients remain in our intensive care unit for at least two to three days. Monitoring includes standard general physical examination parameters, invasive arterial blood pressures, ECG, urine output via urinary catheter and pain scoring. I repeat PCV/total protein, lactate, blood gas and activated clotting times (ACT) immediately postoperatively and then every 8-12 hours, depending on abnormalities and patient progress. I always repeat these blood tests postoperatively, as IV fluids given during the resuscitation and intraoperative period often cause derangements. I use the results to guide my fluid therapy, but also take it with a grain of salt. […]
September 14, 2017

GDV: The Surgery

Part Three: Surgery Tips  Recently in my GDV blog series, I discussed releasing the pressure and decompression, this time I want to focus on surgery. Abdominal Incision: Make the abdominal incision large – from the xipoid to the pubis. You cannot perform a proper exploratory laparotomy without proper visualisation. Additionally, when it comes time to re-rotate the spleen, you will need all the space you can get. Remove the falciform fat to help improve exposure. Derotation: The degree of rotation is variable from 90 to 360 degrees, so not all GDV surgeries will be the same. If the omentum is […]
September 6, 2017

GDV: Releasing The Pressure

Gastric Decompression  In the last blog we covered IV fluid resuscitation and pain relief. This time we will go into more detail about gastric decompression. There are two ways that gastric decompression can be achieved: 1) Trocarisation 2) Stomach tube (orogastric tube) placement The decision on which method to use depends on many factors – personal preferences, past experiences and clinical protocols to name a few. So, which one is the best? A recent retrospective analysis of 116 gastric dilatation and volvulus (GDV) patients (Goodrich et al 2013) found that both methods of gastric decompression had low complication and high […]
August 30, 2017

GDV: Resuscitation

Resuscitation Last month we covered a bit of pathophysiology, presenting clinical signs and the radiographic diagnosis of gastric dilation and volvulus (GDV). Now we cover the three things you need to do as soon as a suspected patient is presented. As discussed, you can often make a presumptive diagnosis without radiographs based on supportive presenting clinical signs and signalment. IV fluid resuscitation Decompression the stomach Pain relief Depending on the number of staff you have available, all of these can be performed simultaneously. If not, follow the above order as shock is the most imminent problem. Catheter Placement Fluid resuscitation […]
July 6, 2017

Temporary catheters in obstructed FLUTDs – Buying time with a blocked cat!

Obstructive feline lower urinary tract disease is a common presentation in both general practice and in an emergency setting. Every clinician has their own approach to treating and managing a cat with obstructive FLUTD signs. Working in an emergency setting, once I have confirmed an obstructed bladder via palpation, I focus on trying to relieve the obstruction as quickly as possible. The first step is obtaining consent from the client to administer pain relief (an opioid IV or IM), place an IV catheter, collect blood for biochemistry, electrolyte and blood gas analysis, and temporarily relieving the obstruction. At our hospital, […]
May 11, 2017

Euthanasia Part 2 – Caring for the Patient

  Last week we discussed the importance of caring for the client during the process of euthanasia of their much loved pet. This month, we focus on your patient. The goals of euthanasia are always to make it as painless, fearless and stress-free as possible for the patient. A vast majority of patients presented for euthanasia are either suffering from chronic, terminal or traumatic disease. The first thing I like to do is ensure the patient’s pain is managed. This usually means providing opioid pain relief. Methadone is my opioid of choice. Butorphanol provides minimal pain relief, but is excellent for […]
May 11, 2017

Euthanasia Part 1 – Caring for the Human

  Euthanasia is a big part of our work as veterinarians. It is something I have to face on every shift working in an emergency setting. It doesn’t get any easier no matter how many times I have to do it, but I have fine-tuned my approach over the years so that each euthanasia process runs as smoothly as possible and with minimal additional stress to patient and client. This week, I will talk about taking care of your client. The most important aspect of taking care of your client in this difficult time is to make sure you really […]