Where day-of-surgery cancellations actually come from
A cancellation on the morning of surgery is rarely a surprise in the clinical sense. It is almost always a piece of information that existed weeks earlier and reached the anaesthetist too late to act on. Broadly, they fall into four groups.
Medication management not planned
The clearest example is the SGLT2 inhibitor class — empagliflozin, dapagliflozin, ertugliflozin — where a withholding plan has to be made days ahead of surgery. When the medication list is assembled from patient recall at a pre-op phone call, the drug is frequently described as “something for sugar” and the plan is never made. Pathways has patients photograph the boxes during the interview, extracts and verifies each one against the source image, and flags the missing withholding plan against the ANZCA and ADS guidance with a named rule version.
Comorbidity not optimised
Poor glycaemic control, uncontrolled hypertension and anaemia are all modifiable given a window. The window only exists if the problem is identified while there is still time — a patient screened at booking has weeks, a patient screened at the pre-admission clinic three days out has none.
Undiagnosed risk not screened
Obstructive sleep apnoea is the standing example: a STOP-Bang of 5 or more in a patient with no diagnosis changes the anaesthetic plan and sometimes the location of care. It requires the questions to have been asked. A structured 12-domain interview asks them on every patient, not just the ones who look high-risk on paper.
Logistics and consent
Fasting instructions misunderstood, no escort home, no discharge support. These are the cheapest to prevent and the most annoying to lose a slot to, and they are caught by asking early rather than by asking better.
The commercial arithmetic
A private hospital knows the contribution margin of a theatre hour. The question a perioperative director is actually asking is not whether the screening is clinically sound but how many cancellations it needs to prevent before it pays for itself. In most private settings a single prevented day-of-surgery cancellation covers several months of the platform, which is why the deployment question — how long before the first list is screened — usually matters more than the pricing question. The SMS-driven workflow runs standalone, so the answer is days.