← Chapter 6
Medical-Surgical Nursing II · Chapter 6

The Six Ps: Early, Late and What You Chart

The neurovascular check is the single most repeated assessment in orthopaedic nursing, and it only saves a limb if you know which of the six Ps still buys you time and which one means the tissue is already dying. Sort the six Ps against the four-to-six hour ischaemia clock, then build a note the next nurse can actually compare against — and finish by choosing the right study for seven questions where the obvious test is the wrong one.
Bed 12 · day one after a tibial nailYou are doing the hourly circulation, motion and sensation check. Each of the six Ps below is a real thing you do with your hands. Decide whether the finding is one that still leaves you time to act, or one that tells you damage is already under way.
Finding

The ischaemia clock

0 h 4 h 6 h 8 h salvageable closing permanent Muscle and nerve die after roughly 4 to 6 hours. Diagnosis is clinical. Do not wait for a picture.

Early — act on these

    Nothing sorted yet.

    Late — damage under way

      Nothing sorted yet.
      Compartment pressures. Normal is 0 to 8 mmHg. An absolute pressure above about 30 mmHg, or a delta pressure (diastolic blood pressure minus compartment pressure) below 30 mmHg, indicates fasciotomy.