Emergency and Field Care

01What the field data show

The Numbers Behind On-Field Emergency Care

Eight findings that set the clock every sideline emergency runs against.

02The plan before the whistle

Field Emergency Care Is Decided in Writing Before Anyone Is Hurt

Emergency and field care begins long before the whistle, with a written emergency action plan that names roles, equipment, and the route an ambulance will take. It is a disciplined sequence, and discipline is the part that can be installed in advance. The professionals who cover elite sport do not improvise. They rehearse. The plan assigns who controls the head, who runs the airway, who retrieves the AED, and who meets EMS at the gate.

The governing position statement is specific about what that document contains Andersen 2002. It calls for a written plan developed with the local emergency medical service. That plan names the personnel involved, the equipment needed, the communication system used to summon care, the mode of transport, and the venue itself. It also has to be reviewed and rehearsed annually, with written documentation of any change.

The mission is simple and unsentimental. Identify, triage, and manage the injury on an emergent basis, then transport. A rehearsed crew compresses the chaos of those first seconds into a sequence everyone already knows by heart.

The medical time out

The 2020 inter-association consensus on catastrophic cervical spine injury adds a layer the older documents did not Mills 2020. It recommends venue-specific training and rehearsals at least annually, covering practice facilities as well as game sites. It asks sports medicine teams to run a prepractice and pre-event review of the plan, covering equipment, roles and communication. Then it asks for one more thing: a pre-event medical time out.

Preparation is measurable, and it has been measured. Of 3,371 United States high schools surveyed, 2,784 reported at least one defibrillator on campus Toresdahl 2013. Schools with a device were 1.83 times as likely to have an emergency action plan for cardiac arrest and 1.99 times as likely to review that plan annually. Equipment and planning travel together.

The athlete on the ground is no longer a competitor. The instant of injury converts a player into a patient, and the responder who keeps that frame clear protects the spine and the airway instead of the score. Every credentialed sideline clinician trains to the same standard as the team physician beside them. This is peer-level work, shoulder to shoulder with athletic trainers and sports medicine. Field competence is measured in the same currency for everyone on the line: a controlled scene, a protected airway, and a patient who reaches the hospital in better shape than the field found them.

03The survey and its order

The Survey Runs in a Fixed Order Because It Is a Priority List

The initial assessment of a downed athlete runs in a fixed order, and that order is a ranking of which failing system kills first. The 2020 consensus states the ranking in one clause and repeats it under five separate questions: the highest priority is maintenance of circulation, airway and breathing Mills 2020. The C-A-B ordering is not a mnemonic. It is a decision about what gets the next ten seconds.

The responder in a field emergency develops a general impression, checks mental status, then works through circulation, airway and breathing while the head stays where it is. Noisy breathing, gurgling, or speech broken into two and three word fragments all mark an airway in trouble. The brain tolerates almost no time without oxygen, so breathing and circulation are not separate concerns from neurology. They are neurology.

What the Glasgow Coma Scale delivers, and what it does not

Mental status is graded with the Glasgow Coma Scale, a scale built from eye, verbal and motor response whose total runs from 3 to 15. A falling score is a brain in trouble, and it tells the responder how aggressively to protect the airway and how fast to move.

It is also a coarse instrument, scored imperfectly by people trained to score it. In a randomized trial, helicopter rescuers watched ten simulated patients spanning the full 3 to 15 range, with one randomized group holding a printed scoring table Chan 2018. Total score accuracy was 60 percent in both groups, and the aid changed nothing. The motor component alone was scored correctly 80 percent of the time and outperformed the total, which the authors read as support for using the motor component in prehospital assessment.

The airway maneuver is not free of motion

Opening the airway of an unconscious athlete moves the neck, and the size of that motion has been measured. In six cadavers with a surgically destabilized C1 to C2 segment, chin lift and jaw-thrust maneuvers narrowed the space available for the spinal cord more than either oral or nasal intubation did Donaldson 1997. The maneuver taught as the spine-sparing option is the one that moved the unstable segment most.

That finding does not retire the jaw thrust, and it is not a reason to hesitate. It sets the terms. Airway access outranks a perfectly still neck and the consensus says so plainly. The way to honor both is manual in-line stabilization held by a second responder while a practiced hand opens the airway. Certainty about the cost is what lets a trained crew pay it without flinching.

Pulse, motor and sensory function are then reassessed in all four extremities and rechecked periodically, because deterioration is the signal that changes the plan. The consensus makes that explicit for the neck Mills 2020. If increased pain, neurologic deterioration or resistance to movement appears during an attempt to align the cervical spine, the attempt is abandoned and the neck is stabilized where it is.

04Restricting spinal motion

The Spine Is Held Still Because the Spinal Cord Does Not Heal Like Bone

Any unconscious or significantly injured athlete is treated as a cervical spine injury until proven otherwise, and the head is held in neutral, in-line stabilization from the first moment of contact. The spinal cord does not heal like bone. The entire protocol exists to stop one careless movement from converting a fracture into paralysis, which is the line between walking off and never walking again.

The field does not reward the loudest responder. It rewards the one who runs the sequence cold while the stadium comes apart around them, because a protected airway and a spine that has not moved are worth more than any heroics.

The vocabulary has changed with the evidence. Full spinal immobilization has given way to spinal motion restriction Fischer 2018. That language was adopted jointly by the American College of Surgeons Committee on Trauma, the American College of Emergency Physicians and the National Association of EMS Physicians. The 2020 athlete consensus uses the same term throughout, and rules that if a long board is used, time on the board should be minimized Mills 2020.

The clinical criteria that decide whether a neck needs restriction at all belong to the decision rules, and Cervical Trauma and the Systematic Read carries the NEXUS and Canadian C-spine work in full. The rest of the red flag literature, including how accurate those flags actually are, sits in The Red Flags Clinicians Screen For.

Log roll or lift and slide

The coordinated log roll is no longer the default technique, and the reason is measured motion. Comparing certified athletic trainers performing both maneuvers, the log roll produced significantly greater lateral flexion and greater axial rotation of the head than the lift and slide Del Rossi 2003. The same study found that training did not improve performance of either technique, which is a null worth sitting with.

The 2020 consensus reaches the same conclusion from cadaver work and turns it into an instruction. An 8-person lift and slide results in less spinal movement than the log roll Mills 2020. The recommended practice is an 8-person lift and slide for supine athletes and a log-roll-push for prone athletes, implemented when feasible. The log-roll push is superior to the log-roll pull for turning a prone athlete.

One responder owns the head and calls every command in two parts, so that the team moves as a single unit and nobody moves early. The device underneath matters less than the crew above it: a full-length rigid spine board and full-body vacuum immobilization were judged equivalent in the degree of cervical spine immobilization they deliver.

Where the athlete goes next

Destination is part of the protocol. The consensus asks that a procedure exist in advance for moving an athlete with evidence of a spinal column injury Mills 2020. That athlete goes to a designated Level I or Level II trauma center, as expeditiously and safely as possible. Once a cervical collar or other motion-restriction equipment is on, it stays on through transport.

05Helmet and shoulder pads

Equipment Comes Off by Decision, and the Face Mask Comes Off Every Time

In equipment sports the helmet and shoulder pads are managed as a matched set, and the 2020 consensus on catastrophic cervical spine injury is direct about what that now means for a field emergency. Face masks in American tackle football should be removed before transport in any athlete with a suspected cervical spine injury, and airway access should be established before transport Mills 2020. That one is not a judgment call.

The helmet and the shoulder pads are a judgment call, and the consensus says so in those words. Their removal is left to the discretion of trained personnel at the scene, performed by people competent to do it while minimizing cervical spine motion. Where circulation, airway or breathing is compromised, or the athlete's level of consciousness is decreased, trained personnel should remove both.

What tips the decision is listed: the athlete's height and weight, the make, model and condition of the equipment, and the types of immobilization devices available. Personnel numbers follow the technique. At least two trained people remove a helmet, one holding in-line stabilization and one working. The torso-tilt method for shoulder pads needs at least four and is not used where thoracic or lumbar injury is suspected. The flat-torso method needs at least two.

Never the helmet alone

One rule inside this is not discretionary, and it is the one a bystander gets wrong. Removing the helmet without also removing the shoulder pads can leave the cervical spine malaligned in American tackle football, men's lacrosse and ice hockey athletes Mills 2020. Cadaver work suggests helmet-only removal produces more angular displacement in an injured spine than healthy-model studies imply.

The mirror image is equally useful. Cervical spine alignment is statistically equivalent with the helmet and shoulder pads on and with both removed, so the athlete is aligned at either end of the process and misaligned in the middle of it. Lacrosse runs the other way, where removal may move the neck toward neutral. If an athlete is found with the helmet already off and the pads still on, the head is supported to hold alignment.

What the recommendation is standing on

The strength of that evidence deserves stating exactly, because overstating it would help nobody standing over an injured athlete. The systematic review behind the consensus screened 1,544 publications and included 49 Mills 2020. One was a randomized trial. Seventy-eight percent concerned football, 84 percent concerned the supine position, and proxy participants stood in for injured athletes in every single study.

No included study examined patient outcomes, and the panel states plainly that the clinically significant amount of cervical spine motion during equipment removal is unknown. Twenty experts then scored 22 conclusions and 45 recommendations, reaching a mean of 8.24 for the conclusions and 8.01 for the recommendations on a nine point scale. That is what a protocol looks like when it is built on measured motion in healthy volunteers and cadavers rather than on outcomes in injured athletes. It is the best available instruction, and it is honest about its own footing.

The catastrophic cervical injury figures themselves, and the criteria for returning to contact afterward, are carried by The Cervical Spine.

06Sudden cardiac arrest

Any Collapsed and Unresponsive Athlete Is Treated as Cardiac Arrest

Sudden cardiac arrest is the leading cause of death in young athletes during sport, and the inter-association consensus removes the guesswork in a single sentence. In any collapsed and unresponsive athlete, cardiac arrest should be suspected and a defibrillator applied as soon as possible for rhythm analysis and defibrillation if indicated Drezner 2007. The presumption runs toward arrest, and the device decides.

The response is unambiguous. Confirm unresponsiveness, call for the AED and EMS, and begin chest compressions. Circulating oxygenated blood to the brain buys the only time that matters, which is why circulation leads the sequence. The same consensus names the elements a program needs in place beforehand. A communication system that reaches first responders. Responders trained in CPR and AED use. A device close enough to retrieve. Integration with the local EMS, and rehearsal.

Where the compression numbers come from

The numbers on the wall chart are outcome findings, and it is worth knowing which. Across 10,371 out-of-hospital arrests with recorded compression data, rates between 100 and 120 per minute carried the greatest likelihood of survival to discharge once depth and compression fraction were accounted for Idris 2015.

Depth behaves the same way, with a peak rather than a floor. In 9,136 adult arrests, adjusted survival was maximal at a compression depth of 45.6 millimeters, and the 15 millimeter window carrying the highest survival ran from 40.3 to 55.3 Stiell 2014. The authors read this as evidence that the 2010 guideline target of more than 50 millimeters with no upper limit sat too high.

The 30 compressions to 2 breaths ratio has been tested against the obvious alternative and held its ground. A cluster-randomized trial across 114 EMS agencies and 23,711 patients compared continuous compressions with compressions interrupted at 30 to 2 Nichol 2015. Survival to discharge was 9.0 percent with continuous compressions and 9.7 percent with the interrupted ratio, a difference that did not reach significance. Hospital-free survival was shorter in the continuous group.

The blunt chest blow that is treated with a shock

The mechanism most likely to mislead a responder on a sideline is commotio cordis, and it is the reason the presumption runs toward arrest. A blunt chest wall blow can stop a structurally normal heart, and more than 180 cases sit in the United States registry Madias 2007. In the experimental model, ventricular fibrillation is induced instantly when the impact lands in a vulnerable window before the peak of the T wave.

Autopsy in these athletes shows no structural cardiac injury, because there is none. The chest blow is not hard enough to damage the thoracic structures over the heart. Victims are most often found in ventricular fibrillation, and the authors name wider availability of defibrillators at youth sporting events as a way to improve safety. Currently available chest protectors are not designed well enough to prevent it.

So a traumatic mechanism can produce a shockable rhythm in an athlete with an intact heart. Speed is everything in that window. Survival was 74 percent when the first shock arrived within three minutes of a witnessed collapse and 49 percent afterward Valenzuela 2000. In athletes specifically, 93 percent of arrests were witnessed, which means almost every one of them happened in front of people who could have started the clock Drezner 2019.

Screening, incidence and the electrocardiogram debate belong to The Pre-Participation Exam, and the cardiac conditions themselves to Systemic Conditions.

07Exertional heat stroke

Exertional Heat Stroke Is Cooled Where the Athlete Fell, Then Transported

Exertional heat stroke is a core temperature above 40 degrees Celsius combined with nervous system dysregulation, arising during physical activity Douma 2020. It remains one of the leading causes of sudden death during sport Casa 2015. The order of operations reverses the reflex to load and go, because the treatment is cooling and the cooling has to start on the field.

Eighteen years of records from the medical tent at one road race produced 274 cases, an incidence of 2.13 per 1,000 finishers, at a mean initial rectal temperature of 41.44 degrees Celsius DeMartini 2015. Immersion cooled them at 0.22 degrees Celsius per minute. Every patient survived, and cooling rate did not differ by sex, age or how hot the athlete was on arrival.

The pooled evidence agrees and adds a practical release. A systematic review of 63 studies found water immersion faster than passive cooling in hyperthermic adults Douma 2020. It also found no single water temperature range superior to another, across cold water at 14 to 17 degrees, colder water at 8 to 12, and ice water at 1 to 5. The water on hand is the water that works.

Why a forehead reading is not a temperature

The decision to immerse rests on a number, and most of the devices used to get that number are wrong by enough to change the decision. Measuring 25 exercising adults outdoors in the heat against rectal temperature as the criterion standard, investigators set a validity limit of 0.27 degrees Celsius of mean bias Casa 2007. Nothing else came close.

Oral devices read 1.20 and 1.67 degrees Celsius low. Axillary devices read 2.58 and 2.07 degrees low. Aural measurement was 1.00 degrees low, and temporal measurement 1.46 degrees low by the manual method and 1.36 low by the modified method used in race medical tents. An athlete whose true core temperature is 41 degrees reads near 39.5 on a temporal scanner and below 39 on an axillary device. That is the difference between an ice bath and a bench.

Heat is an input meeting a state, and the state can be changed in advance. Acclimatization timelines and the environmental physiology belong to Heat, Cold and Altitude, and the fluid and sodium thresholds that produce the other collapse on a hot day belong to Hydration and Electrolytes. Athletes carrying conditions that alter the response, including sickle cell trait, are covered in Special Populations.

08After the ambulance leaves

The Nervous System That Was Protected on the Field Is the One That Recovers

What happens after the ambulance leaves decides the rest of the athlete's career, and it runs on the same nervous system the field emergency threatened. Recovery from any significant injury is governed by the brain and the autonomic balance beneath it, the central integrative state that sets readiness across every system. An athlete whose autonomic tone is disturbed after trauma heals slower, sleeps worse, and returns to sport carrying risk that no symptom checklist displays.

Return to play is a graded, staged progression rather than a single clearance, and it is earned against objective markers rather than against how an athlete says they feel. Heart rate variability, reaction time in milliseconds, balance and postural control, and symptom load are tracked across stages until the system proves it can absorb competition again. The decision framework and the reinjury figures that justify it are carried by Return to Play.

The concussion pathway is separate and stricter, and it has its own consensus tool and its own stepwise strategy. Concussion carries the SCAT6 and the Amsterdam 2023 criteria in full, including the evidence that physiological recovery lags symptom resolution. The field response saves the athlete in minutes. The neurology-guided return protects them for the years that follow, and both belong to the same disciplined standard of care.

09Five claims removed

Five Statements About Field Emergencies Removed From This Page

This page previously framed survival after catastrophic injury around the Golden Hour. A detailed search of the literature and the historical record for support of that concept identified none Lerner 2001. The interval that does have support is far shorter and much more specific: three minutes from witnessed collapse to first shock, and cooling started where the athlete fell.

The page also stated that a defibrillator is not used on an athlete whose collapse came from catastrophic traumatic injury. That contradicts the governing consensus, which directs that a defibrillator be applied to any collapsed and unresponsive athlete for rhythm analysis Drezner 2007. Commotio cordis is the case that settles it, since the mechanism is a chest blow and the finding is ventricular fibrillation. The claim is gone.

Third, the page said a well fitted helmet is left in place unless the airway cannot be reached, the mask cannot be removed, or the spine cannot be neutralized with it on. The 2020 consensus supersedes that default Mills 2020. The face mask comes off before transport in every suspected cervical spine injury. The helmet and shoulder pads come off together, at the discretion of trained personnel, and always when circulation, airway, breathing or consciousness is compromised.

Fourth, the page said the jaw thrust opens the airway while the cervical spine stays in neutral alignment. Cadaver measurement does not support the second half of that sentence, and the airway maneuver has been shown to narrow the space available for the cord more than intubation does Donaldson 1997. The maneuver stays. The claim that it is motion free does not.

Fifth, two statements about field emergency care could not be traced to a primary source and have been deleted. One was a ventilation rate of one breath every six seconds for an adult who cannot breathe adequately. The other was the assertion that the tongue is the most common airway obstruction in an unconscious athlete. A quotation attributed to Dr. Jason Dulberg, which was not drawn from anything he said or wrote, has also been removed. Everything on this page is either sourced to the literature or named as the model's.

10The model's claim

Escalation Is Dosing, and the Field Is Where That Axis Is Timed

Two different kinds of statement sit on this page. One kind is the field's own work: 105 casino arrests, 132 athlete arrests, 10,371 compression recordings, 274 heat stroke cases, and 49 studies of cervical motion in volunteers and cadavers. Those figures belong to the investigators who collected them, and the recommendations built on them belong to the panels that voted.

The other kind is the reading this practice brings. The Unified Model of Tone places every intervention in medicine on a single continuous axis of magnitude, running from the lightest sustained touch to the most invasive surgery. It asks one question of each: does the magnitude of this input match what this system, right now, can use? A collapsed athlete answers without ambiguity. The correct magnitude is enormous and the window is small.

Why calling for the defibrillator is not a retreat

The model states the principle for exactly this situation. When a distortion has descended past what any surface input can reach, the larger magnitude is the correct one, and delay becomes its own kind of harm. Nothing about reaching for a defibrillator, an ice bath, or a Level I trauma center is an admission that manual care failed. It is instrument selection under time pressure.

That framing also settles the posture of the clinician on the sideline. Referring out at speed is the same act as choosing a light contact for a system that can only use a light contact. Both are magnitude matching. A practice that understands the axis does not hesitate at the top of it.

The prediction this page makes

Escalation is currently judged by whether the athlete lived. The model predicts something narrower and more useful, and it can be recorded. Take athletes who survive a field emergency and read four measures against their own preseason values. RMSSD in milliseconds, reaction-time variability, postural sway complexity, and time to return to baseline heart rate after a standardized submaximal load test.

The model predicts these four behave as one factor rather than four. It further predicts that the factor's recovery slope tracks the recorded interval from collapse to the matched intervention more closely than it tracks the severity label assigned on the day. That is a claim about how recovery is organized rather than a claim about what any treatment does, and every one of those measures is already collected by programs that monitor their athletes.

If RMSSD, reaction-time variability, postural sway complexity, and time to return to baseline after a standardized load test are shown to move together in athletes recovering from a field emergency, the unification claim is confirmed.

11The tone reading

The Field Emergency Read as Magnitude and Time

Three foundations of tone carry the signature of a field emergency, and each of them is already recorded on a sideline.

The other foundations run through the same field. Input quality is why a temporal scanner reading 1.36 degrees low can send a heat stroke to the bench instead of the ice bath. Gain is what a defibrillator resets when a chest blow has thrown the heart into fibrillation with no structural damage behind it. Prediction is the rehearsed crew running the next step before it is called. Coupling is the head, the board and eight pairs of hands moving as one unit. Set-point is the core temperature the body was defending until the heat overwhelmed it, and oscillation is the 100 to 120 per minute rhythm a responder imposes when the heart has stopped supplying its own. The full framework is set out in the Unified Model of Tone.

12Where this sits

How This Page Relates to the Rest of the Library

Seven places this argument continues, each with the claim that earns the link.

13Questions athletes ask

Questions Athletes Ask

14The sources

References

19 primary sources, each linked to its record. Figures quoted on this page were checked against the published abstract.