Nursing care
Wrong-Site Surgery Prevention, explained for the bedside and the exam
Written and reviewed by Dana Whitfield, RN, MSN · 5 min read · Updated September 2026
Short answer
Wrong-site surgery prevention rests on the Universal Protocol: pre-procedure verification, site marking, and a final time out before incision. The marking step happens with the patient awake and involved, because an alert patient confirming the correct side or limb catches errors that paperwork alone will not.
What the concept actually says
The Universal Protocol, developed by the Joint Commission, has three components applied to every operative and invasive procedure: a pre-procedure verification that confirms the correct patient, procedure, and site using at least two identifiers; marking of the surgical site; and a time out immediately before starting, where the team stops and verbally confirms everything together.
Site marking is done by the person performing the procedure, using an unambiguous mark such as their initials, placed at or near the incision site so it remains visible after skin preparation and draping. Critically, marking happens while the patient is awake and able to participate, not after induction of anaesthesia.
The clinical reasoning behind it
An awake patient is the last reliable check before anaesthesia removes their ability to speak up. Once sedated, the patient cannot correct a mismatch between the consent form and what the surgical team believes is being operated on. Involving them in marking — asking them to point to or confirm the limb, eye, or side themselves — closes a gap that relying on the chart alone cannot close.
This is also why the mark must be made by the proceduralist and not delegated to another team member who read the chart. Delegation reintroduces the same transcription risk the protocol exists to eliminate. The reasoning generalises: at every step, the safeguard that works is the one that uses an independent, active source of confirmation rather than a repeated read of the same document.
Applying it under time pressure
In an emergency, or when a patient arrives already sedated or non-verbal, the marking step becomes harder but does not disappear. Verification then relies on the medical record, imaging, and confirmation from a family member or the referring team, documented clearly, with two independent staff members cross-checking rather than one person alone.
Time pressure is exactly when shortcuts feel justified and are most dangerous. A nurse preparing a patient for an add-on case, a delayed list, or a physician wanting to move quickly should still insist the time out happens as a full stop, not a formality spoken while someone continues prepping the field. If a discrepancy surfaces during the time out — consent says left knee, chart says right — the case does not proceed until it is resolved.
Common misconceptions
A common misconception is that the surgical time out alone is the safeguard. It is one of three linked steps, and it works because it follows verification and marking done earlier while the patient was still able to participate — it is not a substitute for either.
Another misconception is that site marking is only relevant for limbs. It applies to any procedure involving laterality, multiple structures, or multiple levels — spinal surgery, teeth, ribs, and even some line insertions. Students also sometimes assume the surgeon's assistant or a nurse can mark the site if the surgeon is delayed; the protocol specifically requires the person performing the procedure to do it themselves.
Practice scenarios
A patient is due for a left inguinal hernia repair. The consent form says left, but the surgeon has already left the unit and asks the charge nurse by phone to have someone else mark the site before they arrive. The correct response is to decline and wait, since marking must be performed by the proceduralist with the patient awake to confirm.
A patient scheduled for bilateral cataract surgery on separate days arrives confused about which eye is being done today. Site marking, done while the patient is alert and asked directly which eye, becomes the deciding safeguard rather than the surgical schedule alone. A third scenario: during the time out, the scrub nurse notices the consent form and the surgical checklist list different procedure levels for a spinal fusion. The correct action is to stop the process and resolve the discrepancy before any incision, even if this delays the list.
Key takeaways
Wrong-site surgery prevention is a three-part process, not a single checklist tick: pre-procedure verification, site marking with the patient awake, and a full stop time out immediately before incision. The marking step is the one that most directly involves the patient in their own safety, and it loses its value if delegated or done after sedation.
On the exam and at the bedside, the same principle holds: any discrepancy identified at any of the three steps halts the process until resolved. Nurses are expected to speak up and stop the case, regardless of role hierarchy or time pressure, when verification, marking, or the time out reveals a mismatch.
The next step on this is the same as on everything else here: answer questions and read the rationales. Our reduction of risk potential practice questions are the closest set to what this page covers.
One question from the reduction of risk potential set
Four hours after a cardiac catheterization via the right femoral artery, the nurse notes the client's right dorsalis pedis pulse is now faint and the foot is cool and pale. What is the nurse's priority action?
Rationale
A pulse that was present and is now faint, with a cool, pale extremity distal to the puncture site, is arterial occlusion until proven otherwise — a limb-threatening complication that needs the provider now. Documenting and rechecking wastes the window, warming treats the symptom and masks the change, and asking the client to move the ankle neither restores flow nor gives you new information.
Answer: C
Common questions
Who is responsible for marking the surgical site?
The person performing the procedure marks the site themselves, using an unambiguous mark like their initials. This cannot be delegated to another team member, even under time pressure.
What happens if the patient cannot participate in site marking?
For emergency or non-verbal patients, the team relies on the medical record, imaging, and family or referring-team confirmation, with two independent staff cross-checking the documentation before proceeding.
Is the surgical time out the same as the Universal Protocol?
No. The time out is the final of three components. It follows pre-procedure verification and site marking, and depends on those earlier steps having been done correctly.
Does site marking apply to procedures without limbs, like spinal surgery?
Yes. Marking applies to any procedure involving laterality, multiple structures, or multiple levels, including spinal levels, ribs, and teeth, not only limb surgery.
What should a nurse do if the consent form and surgical checklist disagree during the time out?
Stop the process immediately and do not allow the procedure to begin until the discrepancy is resolved, regardless of scheduling pressure or seniority of who raised it.
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