Secondary Survey
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Direct answer
The secondary survey is a systematic head-to-toe examination plus a focused history, performed only after the primary survey is complete and the patient is stable — its purpose is to find every injury the C-ABCDE sweep was never designed to catch. It runs from scalp to toes, includes a log roll for the back and spine, a rectal examination where indicated, an AMPLE history, and adjuncts such as radiographs, CT, urinary catheterisation and tetanus prophylaxis. Any deterioration during it sends the team straight back to the primary survey. Missed injuries live in the corners this examination is meant to reach.
What you must remember
- Gate rule: the secondary survey starts only when the primary survey is finished, interventions are done, and vitals are stable; it is repeated and refined, never rushed.
- AMPLE history: Allergies, Medications, Past history, Last meal, Events of the injury — the five facts that change anaesthetic and surgical decisions.
- Head-to-toe order: scalp and ears (Battle's sign, raccoon eyes), eyes and pupils, mouth and dentures, neck with maintained collar, chest, abdomen, pelvis (gentle springing once, never repeated), perineum, limbs with distal neurovascular checks, then log roll for spine, flanks and anus.
- Log roll specifics: minimum four people, in-line neutral alignment, inspect and palpate the whole spine, and check for spinal tenderness or a step — before any collar removal decision; adjuncts of this phase include radiographs, CT, gastric tube (oral if basal skull fracture suspected) and catheterisation once the urethra is cleared.
- Rectal examination findings that matter: tone, high-riding prostate, blood at the meatus, perineal haematoma — the cluster pointing to urethral injury before catheterisation.
- Tetanus prophylaxis is decided here: contaminated wound plus unknown immunisation status means tetanus immunoglobulin and vaccine, per national guidelines.
- Reassess, always: a drop in consciousness or blood pressure aborts the survey and restarts C-ABCDE at the head of the bed.
Finding the injury the first sweep missed
A young man on a motorcycle hits a median at speed and is brought in wearing a collar. The primary survey finds a tense abdomen with a positive FAST; he goes for a laparotomy, which stops the bleeding, and he returns to the ED intubated and stable. The next morning in the ICU his left wrist is found swollen and deformed — a fracture nobody had looked for. That is the precise gap the secondary survey exists to close. Done properly, it takes fifteen to twenty minutes of directed examination. The scalp is parted and palpated for bogginess; the ears are checked for blood behind the tympanic membrane, a basal skull sign; the chest wall is compressed anteroposteriorly and laterally for rib tenderness; the abdomen is palpated quadrant by quadrant; the pelvis is tested once with gentle inward and outward pressure — springing it repeatedly by different examiners is a classic ED error that can dislodge clot. Then the four-person log roll: the spine from occiput to sacrum, the flank bruises over the kidneys, the anal tone, and the back of the chest that was never visible supine.
Where students slip
Two errors dominate. First, candidates begin the secondary survey on an unstable patient because the question stem mentions "complete examination" — the exam answer is always to return to the primary survey when vitals wobble; stability gates the survey, and the vignette will test exactly that sequencing. Second, the log roll is treated as a turn rather than a procedure: the MCQ version asks how many staff are needed (four) or what is examined (entire spine, flanks, anus, back of chest), and the viva version asks when the collar can come off — only after the whole cervical spine is imaged and cleared, with the log-roll findings documented. Indian examiners also like the tetanus question attached to a contaminated roadside wound — thinking past the dramatic injury to the mundane, lethal one.
Frequently asked questions
What history is taken in the secondary survey?
The AMPLE history — Allergies, Medications, Past illness, Last meal, and Events surrounding the injury — captured alongside the head-to-toe examination.
When is a urinary catheter contraindicated before insertion?
When blood at the meatus, a high-riding prostate or a perineal haematoma suggests urethral injury — a urology decision comes first.
How many people are needed for a log roll?
At least four: one controlling the head and neck in-line, two rolling the torso and legs, and one examining the back, flanks and spine.
What happens if the patient deteriorates during the secondary survey?
The survey stops immediately and the primary survey is repeated from C-ABCDE, because a new life threat now outranks every missed minor injury.
Why should the pelvis be springed only once?
Repeated springing can dislodge clot at a fracture site and provoke fresh bleeding — one gentle assessment, then a binder if unstable, and imaging.