How to schedule and dispatch timed draws: keeping peaks and troughs inside the window

Timed draw scheduling comes down to three things: the window is on the order, the order is impossible to miss on the dispatch screen, and the route is built so the tech reaches the patient inside that window.

Most draws on a mobile route have some give. If the tech reaches the facility at 9:40 instead of 9:20, the patient is usually still there and the specimen is still good. A timed draw has no give. A trough drawn after the next dose has gone in, or a peak drawn too early, doesn't measure what the clinician ordered. Best case, someone catches it and it gets redrawn. Worst case, nobody notices and the result is read as if it were timed right.

The tech doesn't control the dose. The facility nurse does, and med pass doesn't wait for your route. So a timed draw is a coordination job: the tech has to know the window, the dispatcher has to see it coming, the nurse has to know when the tech will arrive, and the route has to bend around all of it.

The window comes from the order

A timed draw is any draw that has to happen inside a set window. On a mobile route the familiar ones are peak and trough levels: a trough just before the next dose, a peak after a dose at a time the ordering clinician, pharmacy or lab protocol sets. Serial draws, where one patient is drawn more than once at set intervals, are timed too, and they either tie a tech to one address or force a return trip. A random level can be drawn at any time, but the lab still needs the time of the last dose and the time of the draw to read it.

Dispatch doesn't set any of those times and shouldn't second-guess them. Its job starts once the window is on the order: get a tech to the patient inside that window, with everything the draw needs.

Put the whole order in front of the tech

A tech who arrives on time with half the information can still get it wrong. A timed draw order should carry four things the tech sees before walking in:

• The window. The start and end of the service time, not just a date.
• The level. Peak, trough or random.
• The dose, where the order includes one.
• The line. Whether the patient has a PICC, port or other line. The tech avoids the arm with the line, and a level drawn from the line the drug went in through can read falsely high.

If that information lives in a free-text note, it gets missed. When each item has its own field, it shows up in the same spot on every order sheet, and the tech learns where to look.

Pin timed draws above everything routine

A busy morning dashboard can hold hundreds of orders, and a timed draw sorted in with routine work is one somebody finds at 10:20. Timed draws should pin to the top of the dashboard, ordered by how soon each window opens, with the window in its own column. The next window to open is then the first row a dispatcher reads.

STAT orders pin too, for a different reason. A STAT has no dose window. It has a turnaround target agreed with the client, and the clock starts when the order comes in. So a STAT shows a running age that climbs until the order is done, and the dispatcher can hold that age against the target.

Build the route around the window

With the window on the screen, the dispatcher plans the rest of the route to protect it:

• Give it to the tech who will already be close. The tech map shows working techs next to the facilities on their routes, so the nearest one is visible before anyone picks up a phone.
• Don't stack it behind a long stop. A 10:00 trough scheduled right after a full AM rounds list at another building will be missed. Put it after short stops, with slack in front of it.
• Tell the facility when the tech is coming. The nurse can hold the dose for a trough only if they know the tech is on the way.
• Watch the tech's status before the window opens. If the tech assigned to a 10:00 trough is still on site at another facility at 9:45, that is the moment to move the order.

What protects the window is seeing it next to each tech's status, early enough to act.

Keep the record for the redraw conversation

Sometimes a timed draw still goes wrong. The facility gave the dose early, the patient was off the floor, the line couldn't be used. When the lab or the client asks what happened, the chain of custody record is your answer: when the tech was en route, when they arrived, when they left, and any notes they wrote. When a redraw is ordered, record it as a redraw with a reason. Over a few months, those reasons show whether the misses cluster at one facility or one time of day.

Test it with one trough

When you evaluate mobile phlebotomy software for timed work, put one trough on a demo dashboard among a few hundred routine orders. Then ask three things. Where is it? Can the tech see the window, level, dose and line before walking in? When it has to be redrawn, where does the reason go?

Dependable Dispatch pins it to the top with its window, puts the window, level, dose and line in their own fields on the tech's order sheet, and records each redraw with a reason. You can see a timed draw on the dashboard on our home page.

Related reading

• Phlebotomy standing orders and AM rounds
• Specimen chain of custody for mobile phlebotomy