CAM-127

Hallway closed off by visitors

An admissions hallway with forty-odd visitors closed in a ring, wall to wall. In the middle of the ring there’s a cart with someone lying on it and two professionals in scrubs leaning over; a third, in a white coat, is caught at the edge and can’t get out. On the left, an open bay with a free bed and the monitor on: that’s where you have to get to. On the right, the desk with two people behind it. There’s no way through: right now a second cart can’t get in. IRIS counts people and sees where they are; it does not know who any of them are.

CAM-127 · ADMISSIONS CORRIDOR · PASSAGE BLOCKED

What IRIS understands

What it recognizes in this scene

hallway with no way through
cart being attended
professional boxed in
free bay
nurses’ station

What this camera measures

An alert says something’s happening. The reading says how much.

46People in the hallway
31+14Around the cart
5 minClosed off for
18Limit for this stretch
4Professionals inside the ring
18:26Time of the alert

The figures on this screen are an example from the illustration, not any client’s measurement.

The rule

You decide once. IRIS applies it always.

that stretch of hallway holds more people than the hospital has set and the way through stops being clear

Then

alert the station with the camera and the stretch that has clogged up
say how many people there are and since when, so you know who to send
log the time, so the hospital learns what hour that hallway fills up every day

The instruction that set it up«Tell me when the admissions hallway gets so full that a cart can’t get through, and tell me while it is filling up, not once it is already closed off.»

What changes

What changes for whoever runs the unit

Seven in the evening, visiting hours, and the admissions hallway has closed wall to wall. Nobody here’s to blame: people gather where the person they love is, and that isn’t fixed with signs. What’s a problem is that a second cart can’t get through right now and that the family who have just arrived can’t find anyone to ask. With IRIS the control desk knows while the hallway is closing, with the camera, the stretch and how many people are there, and there’s time to open a route. And the figure remains afterward: what time it fills up each day, which is what makes it possible to change how visits are organized instead of pushing people around.

What people usually ask

Does IRIS know who the visitors are?

No. IRIS does not identify anyone: it does not recognize faces, it does not compare them against any database, it does not know who any patient or visitor is, it keeps no file on anyone and it has no access to medical records. Nor does it follow a person from one hallway to another. To know that a cart can’t get down a hallway you only need to count bodies and see where they are, and that’s exactly all it does here.

Is this the same as the room’s capacity?

No. Capacity is a limit on the building, measured at the door: how many people are inside. This measures something else — how tightly packed one specific stretch of hallway is — and they’re two different figures. A lobby can be well under its capacity and still have a hallway no cart can get down. The second figure is the one that stops people working, which is why it’s the one that matters here.

What if a lot of people is normal at that hour?

The limit is set by the hospital, and it can be different per stretch and per time band. During visiting hours you raise the limit for the lobby, where the crowd is expected, and leave the limit for the cart stretch as it is, because that has to stay passable at all times. That’s what keeps the alert meaningful: if it fires every afternoon at the same hour, within a week nobody looks at it.

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