Specialties
In gastroenterology the order is lost days before the appointment
How does the queue reach gastroenterology?
Orders come from internal medicine, the emergency department, chronic-care follow-ups and the unit's own clinic. Many arrive as a referral written in the patient's language: an upper endoscopy is requested, explained and remembered under half a dozen different names, and the patient repeats whichever one they were told in the consultation.
The unit also inherits the specialist queue. A gastroenterology appointment is among the longest waits in a private network, so every colonoscopy that drops also consumes the specialist appointment that generated it.
A gastroenterology schedule that works has the day's list closed seventy-two hours ahead, with every patient confirmed. One that does not work looks identical in the system until the morning of the procedure, when two of eight fail to appear and there is nobody to put in their place, because no one can prepare on two hours' notice.
Why is this the highest-drop unit in the clinic?
Because it asks the patient for far more than an hour on a calendar. A procedure under sedation requires a companion, a day without driving, and a preparation that occupies the preceding days. The total is time off work for two people and a lost day in a household.
And because the preparation carries a silent failure window. Between the booked appointment and the procedure sit several days in which the patient decides, forgets, gets confused, or discovers that something in their own history disqualifies them. Nobody in the unit is watching that stretch: the system records it as a filled slot right up to the minute it stops being one.
Day of the order.
The specialist prescribes the procedure. The patient leaves the consultation not yet knowing what the preparation will demand.
Booking.
Room and equipment are reserved. This is the only moment in the process when the unit and the patient speak.
Preparation window.
Several days in which responsibility sits with the patient and the unit's visibility is zero.
Morning of the procedure.
The unit learns the outcome of the three previous steps, with no room to react.
The only point in that sequence actively managed today is the second. The other three are where it gets decided whether the exam happens.
What does a lost slot actually cost here?
In radiology, an eleven o'clock gap can be refilled with the noon patient and one phone call. In an endoscopy room there is nobody to call, because the replacement would have had to start preparing three days earlier.
The cost stacks in layers: room time, the endoscopist's fee, the anaesthetist's fee, materials already laid out, and the specialist appointment that produced the order. A University of Chile thesis quantified missed specialist appointments in Chile's public system in 2022 at 1,185,393 out of 7,575,359 booked. A procedure with a committed room and anaesthesia runs the same arithmetic with a considerably higher multiplier.
What preparation burden lands on the patient, and how does it become a no-show?
This unit's preparation is the only one in the clinic that runs for days and that the patient executes alone, at home, unsupervised. The exact instruction is set by the ordering site and varies with each patient's history, so you will not find it written here.
What is general is how it fails. The complete instruction usually exists in a document at the site and reaches the patient after booking, when they can no longer react without moving the appointment. Something in their history they did not know mattered surfaces only when they read that document. And the patient who realises rarely calls: they simply do not arrive.
That slot is logged as a no-show and joins the same statistic as the patient who changed their mind. Separating the two causes is the first step toward doing anything about it, and it is worked through in our no-show analysis.
What changes when the order is followed through the whole window?
The calendar changes. Someone speaks with the patient when the order is issued, well before they pick a date, explains what the procedure will demand, and catches there the history the preparation requires reviewing.
After that, the preparation window stops being blind. The patient receives the site's instruction on the days it is useful, asks questions in writing and confirms. The unit knows in advance which of the day's slots are at risk, and that advance notice is the only thing that makes backfilling possible.
The rules stay yours. Surface executes the protocol your unit already wrote, with your institution's brand on the conversation and with the contact limit you set. How those decisions get made is in how the agent decides.
The fecal occult blood test and the H. pylori breath test deserve their own follow-up for a different reason: they are cheap tests whose abnormal result mandates an expensive procedure, and the chain breaks most often exactly between the two.