If a dog on high fluid rates suddenly has a drop in urine production, what should you do first?

In the scenario where a dog on high fluid rates suddenly has a drop in urine production, flushing the urinary catheter with sterile saline is a critical first step. This action is appropriate because a decrease in urine output can often indicate that the urinary catheter may be obstructed or that there is a problem with urine flow. Flushing the catheter helps ensure that it is patent and functioning correctly, which is essential before proceeding to evaluate or diagnose further issues.

By addressing the catheter first, you can potentially resolve a simple problem that could be causing the drop in urine production without escalating the situation or introducing additional delays in care. If the catheter is functioning properly after flushing and urine production does not improve, then the next steps, such as notifying the veterinarian or conducting additional diagnostic tests, would be warranted.

While evaluating kidney function through tests like BUN and creatinine may be important later on, it may not be the immediate priority if there is a clear potential issue with the catheter. Similarly, a urine sediment examination could provide useful information, but addressing potential obstructions should take precedence, as these examinations could be inconclusive if urine flow is not being adequately facilitated.