The zones, and why they stopped driving management
The zonal algorithm’s central rule was that zone II injuries got a mandatory neck exploration. It was abandoned for two reasons, and it is worth separating them, because only the second is really about the zones.
| The problem | The evidence |
|---|---|
| Mandatory exploration | Negative exploration rates of 53%, 56%, 63% and 68% in the series EAST reviewed. Routine exploration in stable patients brings non-therapeutic surgery, missed injuries, longer stays and more complications — and the only randomised trial, Golueke 1984 in 160 patients, found no difference in stay, morbidity or mortality against a selective approach. |
| The zones themselves | Low et al. in 2014 “demonstrated … a poor correlation between the location of the external wound and the injuries to internal structures”. If the entry wound does not predict what is injured, an algorithm keyed to the entry wound cannot be sound. This is the finding that undermines zonal management rather than merely mandatory exploration. |
| What replaced it | Multidetector CT angiography, which is sensitive and specific for vascular, laryngotracheal and many pharyngo-oesophageal injuries in a single study, and which “has resulted in … a significant decrease in formal neck explorations and a virtual elimination of exploratory surgery”. |
The reference
Hard signs and soft signs — and where the sources disagree
This is the single most important disagreement in this module, and this tool does not resolve it.
The RCS review’s Box 1 is headed “‘Hard signs’ indicating immediate explorative surgery in penetrating neck injury” and lists: shock; pulsatile bleeding or expanding haematoma; audible bruit or palpable thrill; airway compromise; wound bubbling; subcutaneous emphysema; stridor; hoarseness; difficulty or pain when swallowing secretions; neurological deficits. EAST’s problem statement uses a near-identical list, including subcutaneous emphysema and hoarseness.
The North of Scotland major trauma guideline splits them differently. Its hard signs are active haemorrhage, pulsatile or expanding haematoma, bruit or thrill, haemodynamic instability, unilateral upper limb pulse deficit, massive haemoptysis or haematemesis, air bubbling in the wound, airway compromise, cerebral ischaemia. Its soft signs — non-pulsatile, non-expanding haematoma, venous oozing, dysphagia, dysphonia, subcutaneous emphysema — include three findings the RCS review calls hard.
Why it matters at the bedside
Under the RCS list, an alert patient with a hoarse voice and some surgical emphysema goes straight to theatre. Under the Scottish list, the same patient gets an immediate CT angiogram. Both are defensible: the RCS list is protective of the aerodigestive injuries that imaging misses, and the Scottish list reflects that these signs are frequently present without an injury needing repair.
This tool lists a sign as hard only where the sources agree, and flags the three disputed ones inline. If you select a disputed sign alone, the result says so and gives you both branches. Your local trauma protocol is the tiebreaker, and it is the one you will be audited against.
One asymmetry is worth noticing: the Scottish guideline sends hard signs and soft signs to immediate CTA — “Perform immediate CTA Neck in patients with hard signs not requiring emergency surgery” and “Perform immediate CTA Neck in patients with soft signs.” So under that guideline, misclassifying a sign as soft does not mean doing nothing. It means scanning instead of operating.
Airway — the decisions that are specific to this injury
The RCS review frames it as two questions: does the patient need immediate airway protection, and what is the best technique here. Clinical signs of airway injury are hoarseness, stridor, dyspnoea, subcutaneous emphysema in the absence of a pneumothorax, bubbling from the wound and large-volume haemoptysis.
What is different about a penetrating neck airway
- Avoid techniques without direct visualisation. Blind placement “can create a false lumen outside the trachea or convert a partial tracheal laceration into a complete transection”. This is the sentence to remember.
- Bag-mask ventilation is not free. Pre-oxygenating or rescuing “must be done with vigilance, as it may force air into injured tissue planes and distort airway anatomy or further disrupt surrounding soft tissue injury”.
- Threatened airway, anatomy preserved → rapid sequence intubation. The review recommends this and cites major trauma centre series supporting it as safe and effective.
- Anatomy distorted and intubation predicted difficult → fibreoptic intubation, which also lets you inspect the supraglottic and infraglottic airway with the patient breathing spontaneously. It needs a cooperative patient, which is often exactly what you do not have.
- Be set up for failure before you start: at least two suction devices, a range of tube sizes, rescue airway devices and a surgical airway kit.
Surgical airway
Immediate indications are massive upper airway distortion, massive midface trauma, and inability to visualise the glottis because of heavy bleeding, oedema or anatomical disruption. “We recommend cricothyrotomy as the first surgical airway of choice, as it is the most direct, simple and safe way of bypassing upper airway obstruction or injury.”
With one significant caveat specific to this injury: cricothyroidotomy “may be difficult in the presence of distorted neck anatomy or if an anterior neck haematoma or laryngeal injury is suspected and carries potential risk to the vocal cords.” Tracheostomy is the answer for skeletal collapse, significant structural airway disruption, or partial or complete transection of the larynx or trachea. “The tracheotomy incision should be made as low in the neck as possible to avoid further injury to the laryngotracheal complex,” with a vertical cervical incision so it can be extended inferiorly. Tracheostomy is also “the primary cause of long-term laryngotracheal complications” even in experienced hands, so it is done when indicated, not by default.
Cervical spine immobilisation — the collar is usually wrong here
“Cervical spine immobilisation is not routinely recommended in penetrating neck injuries.” The reasoning is that the incidence of unstable cervical spine fractures after penetrating injury is very low, while a collar obscures the clinical signs you are relying on and impairs intubation. One cited series reported an increased risk of death with immobilisation in penetrating cervical trauma.
EAST reached the same conclusion through its formal process, at Level 2: “Immobilization of the cervical spine is unnecessary unless there is overt neurologic deficit or an adequate physical examination can not be performed, e.g., the unconscious victim.”
The exceptions
- Focal neurology.
- High clinical suspicion of spinal injury in a patient who is unconscious or heavily intoxicated — i.e. you cannot examine them.
- High-energy mechanism. Cervical spine injury risk “has been demonstrated to be significantly different depending on the mechanism of injury”: gunshot wounds and blunt force such as a road traffic collision carry higher risk and immobilisation needs to be considered. A low-velocity stab wound does not — spinal cord injury occurs in under 1% of these.
Catastrophic haemorrhage and Foley balloon tamponade
“As exsanguination accounts for up to 50% of the mortality from penetrating neck injuries,” the review argues clinicians should know the holding measures. The escalation is direct pressure, then haemostatic dressings, then balloon tamponade.
The technique, as described
- Introduce a Foley catheter into the wound, following the wound track.
- Inflate the balloon “with 10–15 ml of water until resistance is met”.
- Clamp the catheter — or knot it on itself — to stop blood flowing out through the lumen.
- Suture the neck wound closed around the catheter.
“This is a well-recognised technique for temporarily arresting bleeding and can sometimes avoid the need for emergency surgery.” If compression or balloon tamponade controls the haemorrhage, the patient can go to angiography to identify the source before operative or endovascular intervention — which converts a crash laparotomy-equivalent into a planned procedure.
The oesophagus — the injury this pathway is worst at finding
Cervical oesophageal injuries are less common, because the oesophagus sits centrally and protected. That is exactly what makes them dangerous: “These are often silent injuries with no findings on clinical examination.” EAST puts it as a Level 3 recommendation — “Physical examination is inadequate to rule out injuries to the aerodigestive tract.”
And CT angiography, the study the whole no-zone approach rests on, is the weakest here. Its sensitivity for pharyngo-oesophageal injury has been reported “to be as low as 53%”. Coupled with a mortality around 20%, that is why a normal CTA is not the end of the assessment in a patient whose trajectory or symptoms raise the question.
The add-on pathway
Contrast swallow first; flexible oesophagoscopy if that is non-diagnostic, with a sensitivity close to 100%. EAST’s Level 2 recommendation treats the two as interchangeable rather than sequential: “Either contrast esophagography or esophagoscopy can be used to rule out an esophageal perforation that requires operative repair.”
Two different clocks — and this is a genuine conflict
The RCS review: “Patients presenting within 12 hours of injury may undergo direct suture repair and drainage. After 12 hours of injury, morbidity and mortality increases and direct repair is less likely to be successful.” After that window, debridement and drainage with planned delayed repair.
EAST: “Diagnostic workup should be expeditious because morbidity increases if repair is delayed by more than 24 hours.”
These are not the same number, and neither source acknowledges the other’s. The safe reading for an ED clinician is the shorter one — it is the more conservative, and nothing follows from treating a 12-hour target as the deadline except getting the diagnosis faster. Do not let the existence of a 24-hour figure become a reason to slow down.
All patients with suspected oesophageal injury: nil by mouth, intravenous antibiotics, and surgical nutrition. Untreated, these cause mediastinitis, abscess or empyema.
Vascular injury — what the surgeons will be deciding
Not an ED decision, but knowing the destination changes who you call and how urgently.
- Carotid: repair beats ligation, and the striking part is that this holds “irrespective of whether or not a preoperative focal neurological deficit was present”. EAST agrees at Level 2: internal carotid injuries “should be repaired, even when severe neurologic deficits are present”, excepting minimal intimal irregularities and small pseudoaneurysms without deficit. A dense hemiparesis is not a reason to write off the artery.
- Vertebral artery: interventional radiology, not the knife. “Angiographic approaches to the vertebral artery are preferred to operative approaches for patients with bleeding from vertebral artery injuries.”
- Jugular vein: “Isolated jugular venous injuries are generally innocuous as the low-pressure venous system usually tamponades or occludes without major haemorrhage.” Ligation is appropriate for complex injuries or unstable patients.
- Zone I needs the chest team early. Treatment may require a sternotomy or thoracotomy to gain proximal control. The Scottish guideline says the same: “Some Zone 1 injuries will require a thoracotomy for proximal control.”
If a laryngotracheal injury is suspected, panendoscopy and bronchoscopy under general anaesthesia should come before surgical exploration. Small mucosal defects and undisplaced laryngeal fractures can be managed conservatively; significant skeletal fractures need open repair.
The numbers behind the anxiety
| Figure | Value |
|---|---|
| Share of trauma | 5–10% of all trauma cases |
| Mortality | Up to 10% |
| Exsanguination | Up to 50% of the deaths |
| Arterial injury | ~25% of penetrating neck injuries |
| — carotid / vertebral | ~80% and 43% of those arterial injuries — the figures overlap because combined carotid and vertebral injury occurs, and it carries both haemorrhagic and neurological risk |
| Aerodigestive injury | 23–30% of patients |
| — mortality | ~20% for both pharyngo-oesophageal and laryngotracheal injury |
| Spinal cord injury | Under 1%, particularly in low-velocity injuries such as stab wounds |
| Significant injury by mechanism | ~50% of gunshot wounds (higher with high-velocity weapons); 10–20% of stab wounds |
Mechanism worldwide, in order: stab wound from violent assault, then gunshot wounds, self-harm, road traffic collisions and other high-velocity objects.
A caveat about where this evidence comes from, rather than a claim about UK epidemiology. Much of the literature underpinning both the zonal and the no-zone approach is drawn from centres in the United States and South Africa, and the reference lists show it — Groote Schuur, Johannesburg, Cook County. Gunshot wounds carry roughly 50% risk of significant injury against 10–20% for stab wounds, so a case mix weighted differently from your own changes the pre-test probability behind every figure on this page. None of these sources reports UK mechanism proportions, so this module does not assert any.
What this module deliberately does not do
- It does not give you a discharge rule. None of the three sources provides a validated criterion for sending a platysma-breaching neck injury home from the ED. The nearest thing in the literature is observation, and one cited series notes that “observation for up to 48 hours may be necessary”. Disposition here is a surgical decision.
- It does not cover children separately, because the evidence does not. EAST states plainly: “There is little data on selective management of penetrating neck injuries in children,” with small studies suggesting a selective strategy is safe. The RCS review does not address paediatric practice at all. Everything on this page should be read as describing adult practice, and a child with a penetrating neck injury needs the paediatric surgical and anaesthetic team, not an extrapolation from this page.
- It does not use the zone to decide imaging. That is the whole argument of the no-zone approach, and implementing it any other way would misrepresent the source.
- It does not settle the hard/soft sign disagreement. See the first reference panel.
The population warning is not decorative. Across this estate, the commonest audit finding by some margin has been a tool that quietly assumed adults and then handed a confident number to a paediatric case.
Sources in full
- Nowicki JL, Stew B, Ooi E. Penetrating neck injuries: a guide to evaluation and management. Annals of the Royal College of Surgeons of England 2018;100(1):6–11. doi:10.1308/rcsann.2017.0191. PMID 29046084. A literature review in the College’s journal, not a College guideline — see the note at the top of this page. Open access via PubMed Central (PMC5849205).
- North of Scotland major trauma guidelines (NHS Grampian), Penetrating neck injury. Published on NHS Scotland Right Decisions. A short operational UK guideline; the source of the hard/soft sign split used here and of the “immediate CTA for soft signs” rule.
- Tisherman SA, Bokhari F, Collier B, et al. Clinical Practice Guidelines: Penetrating Neck Trauma. Eastern Association for the Surgery of Trauma, 2008. A formal guideline with graded recommendations, but scoped to zone II and now over fifteen years old. Cited here for its Level 1–3 recommendations and its evidence tables.
- NICE NG41, Spinal injury: assessment and initial management. Cited for what it does not say.
Every quotation on this page is verbatim from the source named beside it. Where two sources conflict, both are quoted rather than reconciled.
Related
CT head & C-spine rules · Bleeding & anticoagulation reversal · Silver trauma · ED procedures (RSI, cricothyroidotomy) · RSI planner
The decision tool tells you what to do. This chapter is about why — why the platysma is the only definition that matters, why fifty years of algorithms keyed to “the zone” are being unwound, why a normal CT angiogram is not the end of the story for the oesophagus, and why the collar you would reach for on reflex is usually the wrong instinct in this one injury. It is meant to be read before the shift, not during it.
A 27-year-old is brought in after a stab wound to the left side of the neck in an assault. He is alert, talking, observations normal. The wound is a 2 cm laceration just below the angle of the mandible — zone II. There is a little surgical emphysema you can feel around it, and his voice sounds slightly hoarse; there is no expanding haematoma and no active bleeding. A colleague, reading off the old teaching, says: “Zone II — that’s a mandatory neck exploration, call the surgeons for theatre.” Another says: “Put a collar on him first, it’s a neck injury.”
Both statements are a generation out of date, and one of them is a genuine live disagreement between the sources this module is built on. What actually decides whether this man goes to theatre, to the scanner, or neither — and does the collar help or harm?
The shape of it
Why, in one table
| The question | What decides it | Source |
|---|---|---|
| Is this a PNI at all? | Platysma breached. If not, the wound is superficial by definition. | RCS / NoS |
| Straight to theatre? | Any hard sign — bypass imaging, explore. | RCS / EAST |
| Scan or theatre for this sign? | Three signs (emphysema, hoarseness, dysphagia) — hard to RCS/EAST, soft to NoS. Sources split. | disputed |
| Everyone else | CT angiography — regardless of zone. | Inaba 2012 |
| Does the zone decide imaging? | No. The external wound does not predict the internal injury. | Low 2014 |
| Collar? | Not routine. Exceptions: focal neurology, unexaminable patient, high-energy mechanism. | EAST L2 |
| Normal CTA — done? | Not for the oesophagus; CTA sensitivity there may be ~53%. Add swallow ± endoscopy. | EAST |
| Airway | Never blind; RSI if anatomy preserved, cricothyroidotomy caveats if distorted. | RCS |
The platysma is the whole definition
A penetrating neck injury is a wound that has breached the platysma. If the platysma is intact, “by definition, the wound is superficial”, and the North of Scotland guideline is just as blunt: “If the platysma is not breached, a significant injury is effectively excluded.” This is not a formality to tick past — it is the gate that determines whether any of the rest of the pathway applies.
Two disciplines follow from taking the definition seriously. First, do not probe the wound track and do not remove an impaled object. Blind probing can dislodge the clot that is the only thing holding a vascular injury closed, and an impaled object may be tamponading the very vessel it has torn. Inspect early, under local anaesthesia if that makes the assessment accurate, and look. Second, “cannot tell” is not “no”. If you cannot see the base of the wound, you have excluded nothing; an equivocal platysma assessment means further investigation, not discharge. The tool encodes this — the “cannot tell” branch keeps the pathway open rather than closing it.
Platysma breached → you are on the pathway. Platysma intact and clearly seen → superficial. Not sure → treat as breached until proven otherwise.
The death of the zones
For half a century the algorithm keyed off Monson’s three anatomical zones (1969): zone I below the cricoid, zone II from cricoid to the angle of the mandible, zone III above it to the skull base. The central rule was that a zone II injury got a mandatory neck exploration, because zone II is the most exposed and the easiest to access surgically. That rule has been abandoned, and it is worth separating the two distinct reasons why — because only the second is really about the zones.
Reason one: mandatory exploration was wasteful. The series EAST reviewed reported negative exploration rates of 53%, 56%, 63% and 68% — most explorations found nothing to repair, at the cost of non-therapeutic surgery, longer stays and complications. Golueke’s 1984 randomised trial (Evidence tab) found no difference in stay, morbidity or mortality between routine and selective exploration. So mandatory exploration fell — but on its own, that argument still leaves the zones intact as a triage tool.
Reason two — the deeper one — is that the zone of the external wound does not predict the internal injury. Low et al. (2014, Evidence tab) correlated the external wound zone with the actual internal injuries and found a high rate of non-correlation: injuries frequently lay outside the zone the skin wound pointed to. If the entry wound does not tell you what is injured, an algorithm keyed to the entry wound cannot be sound. That is what undermines zonal management, not merely mandatory exploration.
What replaced it is multidetector CT angiography for everyone who is stable and has no hard sign, regardless of zone. Inaba’s prospective multicentre study (Evidence tab) found MDCTA 100% sensitive and 97.5% specific for clinically significant injury — one study that images the vessels, the larynx and trachea, and much of the pharyngo-oesophagus at once, and which has driven a near-elimination of exploratory surgery.
Hard signs, soft signs — and the disagreement the tool will not resolve for you
The modern pathway is: hard sign → theatre, bypass imaging; soft sign or asymptomatic → CT angiography (or observation). Hard signs are the ones that mean a structure is injured badly enough that the scanner only wastes time: shock, pulsatile bleeding or expanding haematoma, bruit or thrill, airway compromise, air bubbling from the wound, massive haemoptysis or haematemesis, neurological deficit or cerebral ischaemia.
Here is the live disagreement, and it is the most important thing in this module. Three signs — subcutaneous emphysema, hoarseness/dysphonia, and difficulty swallowing secretions — are classed as hard signs by the RCS review and by EAST, but as soft signs by the North of Scotland guideline. Under the RCS list, an alert patient with a hoarse voice and some surgical emphysema goes straight to theatre. Under the Scottish list, that same patient gets an immediate CT angiogram. Both are defensible: the RCS position is protective of the aerodigestive injuries that imaging can miss; the Scottish position reflects that these signs are frequently present without an injury that needs repair.
The tool lists a sign as hard only where the sources agree, and flags the three disputed ones inline — pick a disputed sign alone and it shows you both branches. There is one reassuring asymmetry: under the Scottish guideline, misclassifying one of these as “soft” does not mean doing nothing, because it sends soft signs to immediate CTA anyway. The floor under the disagreement is a scan, not a discharge. Your local trauma protocol is the tiebreaker, and it is what you will be audited against.
The airway: never blind, and set up to fail
The neck injury changes airway management in specific ways. The sentence to remember is that blind placement “can create a false lumen outside the trachea or convert a partial tracheal laceration into a complete transection” — so avoid techniques without direct visualisation. Even bag-mask ventilation is not free: it may force air into injured tissue planes and distort the anatomy, so pre-oxygenate and rescue with vigilance.
The decision tree the RCS review sets out: a threatened airway with preserved anatomy → rapid sequence intubation, supported as safe in major-trauma-centre series. Distorted anatomy with a predicted difficult intubation → fibreoptic intubation, which also lets you inspect the airway with the patient breathing — but needs a cooperative patient, which is often exactly what you do not have. Whichever you choose, be set up for failure before you start: two suction devices, a range of tube sizes, rescue devices, and a surgical airway kit open.
On the surgical airway, the review recommends cricothyroidotomy as first choice — most direct, simple and safe — with a caveat specific to this injury: it “may be difficult in the presence of distorted neck anatomy or if an anterior neck haematoma or laryngeal injury is suspected”. Where the larynx or trachea is transected or the skeleton has collapsed, tracheostomy is the answer, made as low in the neck as possible through a vertical incision so it can be extended. But tracheostomy is itself the primary cause of long-term laryngotracheal complications, so it is done when indicated, not by default. (The cricothyroidotomy procedure is in the ED procedures library.)
The collar: the reflex is usually wrong here
“Cervical spine immobilisation is not routinely recommended in penetrating neck injuries.” The reasoning has three strands: the incidence of an unstable cervical spine fracture after penetrating injury is very low (spinal cord injury occurs in under 1%, especially in low-velocity stab wounds); a collar obscures exactly the clinical signs — the expanding haematoma, the tracheal position — that you are relying on; and it impairs intubation in the airway you may urgently need. One cited series reported an increased risk of death with immobilisation in penetrating cervical trauma. EAST reached the same conclusion at Level 2: immobilisation is unnecessary unless there is an overt neurological deficit or the patient cannot be examined.
The exceptions are the corollaries: focal neurology; a patient you cannot examine (unconscious, heavily intoxicated) with clinical suspicion; and a high-energy mechanism — a gunshot wound or a blunt element such as a road traffic collision, where the C-spine injury risk is genuinely higher. A low-velocity stab does not qualify.
Catastrophic haemorrhage and the Foley in the neck
Exsanguination accounts for up to half the deaths from penetrating neck injury, so the holding measures are core knowledge, not surgical trivia. The escalation is direct pressure → haemostatic dressing → balloon tamponade. The balloon technique, as the review describes it: introduce a Foley catheter into the wound following the wound track; inflate the balloon with 10–15 mL of water until resistance is met; clamp or knot the catheter so blood cannot escape through the lumen; and suture the neck wound closed around it.
The strategic value is not just stopping the bleeding — it is what it buys. If pressure or balloon tamponade controls the haemorrhage, the patient can go to angiography to identify the source before operative or endovascular repair, which converts an emergency into a planned, mapped procedure. A holding measure that turns a crash neck exploration into a controlled angiogram is worth knowing cold.
The silent oesophagus: the injury the pathway is worst at finding
Cervical oesophageal injuries are less common, because the oesophagus sits centrally and protected — which is exactly what makes them dangerous. “These are often silent injuries with no findings on clinical examination,” and EAST’s own recommendation is that “physical examination is inadequate to rule out injuries to the aerodigestive tract.” Worse, the pillar of the whole no-zone approach — CT angiography — is at its weakest here: its sensitivity for pharyngo-oesophageal injury has been reported as low as 53%, against a mortality around 20% for a missed one.
So a normal CTA does not close the assessment in a patient whose trajectory or symptoms (odynophagia, a central track, surgical emphysema) raise the question. The add-on pathway is a contrast swallow first, then flexible oesophagoscopy if that is non-diagnostic (sensitivity close to 100%); EAST treats the two as interchangeable rather than strictly sequential. And there is a genuine conflict on the clock: the RCS review says direct repair is best within 12 hours, while EAST says morbidity rises if repair is delayed beyond 24 hours. Neither acknowledges the other’s number. Take the shorter one — nothing is lost by getting the diagnosis faster, and treating the 24-hour figure as a deadline is how a repairable injury becomes mediastinitis. All suspected oesophageal injuries: nil by mouth, IV antibiotics, surgical nutrition.
Ten pitfalls
01 Using the zone to decide whether to scan
- The trap
- “Zone II — explore; zone I or III — image.” The old algorithm.
- Why
- Low 2014: the external wound does not predict the internal injury. The zone triages surgical access, not imaging.
- Instead
- Hard sign → theatre; everyone else stable → CTA, regardless of zone.
02 Probing the wound or pulling an impaled object
- The trap
- Exploring the track at the bedside to “see how deep it goes”.
- Why
- It can dislodge the clot tamponading a vascular injury; an impaled object may be plugging the vessel it tore.
- Instead
- Inspect and look; leave impaled objects for theatre.
03 Reading “cannot tell” as “no”
- The trap
- An equivocal platysma assessment filed as a superficial wound and discharged.
- Why
- Both sources say equivocal means further investigation; you have excluded nothing if you cannot see the wound base.
- Instead
- Treat as breached until proven otherwise.
04 A blind airway
- The trap
- Blind digital or bougie-first intubation in a distorted neck.
- Why
- It can create a false passage or complete a partial tracheal laceration.
- Instead
- Direct visualisation always; RSI if anatomy preserved, fibreoptic if distorted, surgical airway kit ready.
05 Collaring the low-velocity stab
- The trap
- A hard collar on every “neck injury” by reflex.
- Why
- Unstable C-spine fracture is rare after penetrating injury; the collar hides the signs and one series linked it to higher mortality.
- Instead
- No routine collar; reserve it for focal neurology, the unexaminable patient, or a high-energy mechanism.
06 Treating a normal CTA as an all-clear for the oesophagus
- The trap
- Normal angiogram → discharge, despite odynophagia or a central track.
- Why
- CTA sensitivity for pharyngo-oesophageal injury may be ~53%; a missed one carries ~20% mortality.
- Instead
- Add contrast swallow ± oesophagoscopy when trajectory or symptoms raise it; NBM, antibiotics.
07 Writing off the carotid because of a dense deficit
- The trap
- “There’s already a hemiparesis — ligate it.”
- Why
- Repair beats ligation for carotid injury irrespective of a pre-op neurological deficit (RCS; EAST L2).
- Instead
- A dense deficit is not a reason to abandon the artery; this is a surgical decision, but frame the referral accordingly.
08 Forgetting zone I needs the chest team early
- The trap
- A zone I bleed managed as a neck problem alone.
- Why
- Proximal control may require a sternotomy or thoracotomy; the thoracic team has to be there.
- Instead
- Call cardiothoracic early for zone I — the zone still drives access.
09 Assuming the sources agree on the signs
- The trap
- Treating “subcutaneous emphysema / hoarseness / dysphagia” as settled hard signs (or settled soft signs).
- Why
- RCS and EAST call them hard; NoS calls them soft. There is no consensus to defer to.
- Instead
- Follow your local protocol; the floor under the disagreement is an immediate CTA, not discharge.
10 Applying any of this to a child
- The trap
- Extrapolating the adult thresholds, Foley volume and no-collar rule to a paediatric case.
- Why
- Every source is adult; EAST notes little paediatric data; a child’s C-spine is not a small adult’s.
- Instead
- Paediatric surgical/anaesthetic teams and the regional paediatric major trauma pathway.
Seven red herrings
Mandatory zone II exploration is obsolete (Golueke; negative-exploration rates 53–68%). Stable + no hard sign → CTA.
Low 2014: the external zone does not predict the internal injury. The track can go anywhere.
Not for the oesophagus (sensitivity ~53%). Trajectory or symptoms → swallow ± endoscopy.
Usually the wrong reflex here — the collar hides signs, impairs the airway, and unstable fractures are rare after penetrating injury.
Probing can dislodge a tamponading clot. Inspect and look; do not explore at the bedside.
“Cannot tell” is not “no”. An unseen wound base has excluded nothing.
Repair still beats ligation with a pre-op deficit. Do not write the artery off.
The case, revisited
The 27-year-old, zone II stab, hoarse voice, surgical emphysema, otherwise stable. First, the two out-of-date instincts. “Zone II = mandatory exploration” is a generation old — Golueke’s RCT found no advantage to routine exploration, and Low 2014 showed the zone does not even predict the internal injury. “Collar him” is the wrong reflex for a low-velocity stab: an unstable C-spine fracture is rare here, the collar hides the very haematoma you are watching for, and there is no focal neurology, no inability to examine and no high-energy mechanism to justify it.
What actually decides his destination is the hoarseness and the emphysema — and this is the honest disagreement at the centre of the module. Under the RCS review and EAST, those are hard signs: he goes to theatre. Under the North of Scotland guideline they are soft signs: he gets an immediate CT angiogram. The tool will not pick for you; your local trauma protocol is the tiebreaker and the thing you will be audited against. But notice the floor: on either reading he is not for discharge and not for a collar — he is for the surgical team now, with a scan or a theatre, and with the oesophagus specifically kept in mind because a normal CTA would not clear it. The two confident, outdated sentences at the bedside were both wrong; the modern answer is “platysma breached, no undisputed hard sign yet, escalate and image — and read the sign dispute off your own protocol.”
There is no randomised trial of the no-zone approach itself, and there never will be — the evidence is one old RCT of exploration strategy, a set of observational cohorts that dismantled the zones, and one prospective study that established CT angiography as accurate enough to replace the knife. What follows is that evidence, with every figure taken from the published abstract, and honest about the level each sits at.
Inaba 2012 — prospective multicentre MDCTA for PNI
Prospective study at two Level I trauma centres (2009–2011). All penetrating neck injuries had a structured examination: hard signs → exploration, asymptomatic → observation, soft signs → MDCTA, tested against an aggregate gold standard (operation, follow-up, and where done angiography/endoscopy/swallow).
| Hard signs | 8.6% of patients — 89.7% had a clinically significant injury |
| No signs, observed | 41.7% — no missed injuries on follow-up |
| MDCTA performance | 100% sensitivity, 97.5% specificity for all clinically significant injuries |
| Nondiagnostic scans | 1.8% (artefact); one vertebral-artery injury then found at angiography |
Inaba K, et al. J Trauma Acute Care Surg 2012;72(3):576–83. PMID 22491539.
Low 2014 — the zones vs the actual injuries
146 patients with penetrating neck trauma; each external wound zone was documented and every internal injury correlated with it. An injury was “unexpected” if it lay outside the zone the external wound pointed to. 37 patients (25%) sustained 50 internal injuries.
| Key finding | A high incidence of non-correlation between the external wound zone and the internal structures actually injured, including in patients with hard signs |
| Authors’ conclusion | The use of the anatomic zones in the workup of PNI is “questionable” |
Low GM, Inaba K, et al. Am Surg 2014;80(10):970–4. PMID 25264641.
Golueke 1984 — the only RCT
160 patients with platysma-breaching neck injuries randomised to routine exploration (group A) versus selective operation based on clinical or radiographic evidence of major vascular, visceral or airway injury (group B).
| Length of stay, morbidity, mortality | No statistical difference between routine and selective exploration |
| Authors’ conclusion | No clear advantage to either strategy; base management on local experience and resources |
Golueke PJ, et al. J Trauma 1984;24(12):1010–4. PMID 6512894.
Prichayudh 2015 — a no-zone selective cohort
86 PNI patients (64 stab, 12 gunshot, 4 shotgun, 6 other) managed by a no-zone selective protocol: hard signs → immediate exploration; soft signs / asymptomatic → selective investigation (CTA in 21) or observation.
| Non-operative management | 45 patients (52%) managed successfully without surgery |
| Overall negative exploration rate | 7% (3 of 41 explored) — against the 53–68% of the mandatory-exploration era |
| Missed injuries | None |
| Mortality | 2% (2 patients, both from associated chest injuries) |
Prichayudh S, et al. Injury 2015;46(9):1720–5. PMID 26117413.
Reading it critically
What this evidence can and cannot carry
- There is no RCT of the no-zone approach, and EAST’s formal position is equipoise, not endorsement. EAST’s Level 1 statement is that selective management and mandatory exploration of zone II are “equally justified and safe” — a statement of equivalence. The no-zone case is built on the observational literature of the 2000s–2010s and the fall in negative explorations, not on a trial that randomised zone-based against no-zone care.
- The one RCT is old and pre-CT. Golueke randomised routine vs selective exploration on 1977–82 data, before multidetector CT existed, and collected data retrospectively. It licenses selectivity; it does not validate modern imaging triage.
- The pillar study is single-institution-pair and observational. Inaba’s 100%/97.5% is impressive but comes from two US Level I centres with a specific case mix and a composite gold standard; Level II evidence, not Level I.
- Case mix drives the pre-test probability. Much of the literature is from US and South African centres with high gunshot proportions (≈50% significant-injury risk) versus stab wounds (10–20%). None of these sources reports UK mechanism proportions, so the absolute numbers may not transfer to your department.
- CT angiography’s blind spot is the oesophagus. The ~53% sensitivity for pharyngo-oesophageal injury is the single most important limitation of the pathway, and the reason a normal scan is not the end of the assessment.
The no-zone approach is well-supported for what it primarily does — safely reducing needless neck explorations by triaging on physical signs and a sensitive CT angiogram — and this module implements it. But it rests on observational evidence, an old RCT and a formal guideline (EAST) that stops at equipoise; there is no international consensus and no UK national guideline at all. So implement it, but hold two things firmly: the sources genuinely disagree on three signs (read your local protocol), and CT angiography does not clear the oesophagus. Early surgical involvement is the constant regardless of which sign-list your department uses.
What this is, and what it is not
The Decision tool implements the no-zone pathway and quotes its three sources verbatim in the reference panels — with the disagreements shown rather than reconciled. The Teaching and Evidence tabs are the author’s synthesis of those sources and the primary studies behind them, written to explain the tool, not to extend it. Nothing in them changes what the tool tells you to do.
What this module deliberately does not do
- It does not give a discharge rule. None of the three sources provides a validated criterion for sending a platysma-breaching neck injury home from the ED; disposition is a surgical decision (one series notes observation up to 48 hours).
- It does not cover children, because the evidence does not. Every source is adult; EAST notes little paediatric data and the RCS review does not address children at all.
- It does not use the zone to decide imaging. That is the whole argument of the no-zone approach.
- It does not settle the hard/soft sign disagreement. It shows both and defers to your local protocol.
Sources in full — decision tool
- Nowicki JL, Stew B, Ooi E. Penetrating neck injuries: a guide to evaluation and management. Ann R Coll Surg Engl 2018;100(1):6–11. A literature review in the College’s journal — not a College guideline. Open access (PMC5849205).
- North of Scotland major trauma guidelines (NHS Grampian), Penetrating neck injury. The short operational UK guideline; the source of the hard/soft split used here and of the “immediate CTA for soft signs” rule.
- EAST 2008. Tisherman SA, et al. Clinical Practice Guidelines: Penetrating Neck Trauma. Formal graded recommendations, scoped to zone II and now over fifteen years old.
- NICE NG41, Spinal injury. Cited for what it does not say about penetrating trauma.
Every quotation in the Decision tool is verbatim from the source named beside it; where two sources conflict, both are quoted rather than reconciled.
References — teaching and evidence
- Nowicki JL, Stew B, Ooi E. Penetrating neck injuries: a guide to evaluation and management. Ann R Coll Surg Engl 2018;100(1):6–11. PMID 29046084.
- North of Scotland major trauma guidelines (NHS Grampian). Penetrating neck injury. NHS Scotland Right Decisions.
- Tisherman SA, Bokhari F, Collier B, et al. Clinical practice guidelines: penetrating neck trauma. Eastern Association for the Surgery of Trauma, 2008.
- Inaba K, Branco BC, Menaker J, et al. Evaluation of multidetector computed tomography for penetrating neck injury: a prospective multicenter study. J Trauma Acute Care Surg 2012;72(3):576–83. PMID 22491539.
- Low GM, Inaba K, Chouliaras K, et al. The use of the anatomic ‘zones’ of the neck in the assessment of penetrating neck injury. Am Surg 2014;80(10):970–4. PMID 25264641.
- Golueke PJ, Goldstein AS, Sclafani SJ, Mitchell WG, Shaftan GW. Routine versus selective exploration of penetrating neck injuries: a randomized prospective study. J Trauma 1984;24(12):1010–4. PMID 6512894.
- Prichayudh S, Choadrachata-anun J, Sriussadaporn S, et al. Selective management of penetrating neck injuries using “no zone” approach. Injury 2015;46(9):1720–5. PMID 26117413.
- Monson DO, Saletta JD, Freeark RJ. Carotid vertebral trauma. J Trauma 1969;9(12):987–99. (The origin of the three zones.)
- National Institute for Health and Care Excellence. Spinal injury: assessment and initial management (NG41). 2016.
Every trial figure on the Evidence tab is taken from the published PubMed abstract. Where a figure was not in the abstract, the page does not state it. No illustration was drawn for this page.