Canyoneering First-Aid

IN THIS MODULE

01 FIRST 5 MINUTES: KEEP IT SIMPLE

02 TEAM MEDICAL BRIEF BEFORE THE CANYON

03 THE FIRST-AID KIT: SHARE THE LOAD

04 DROWNING: BREATHING IS THE PRIORITY

33 Canyoneering First-Aid

In a remote canyon, your group may be the first medical help available for a long time.

Field first aid is about stabilizing the problem, preventing it from getting worse, and making a realistic evacuation decision.

Canyoneering first-aid is different from the same injury at home. A rolled ankle may happen five miles from the vehicle. A mild chill can become a serious cold problem while the team is still committed to multiple rappels. A small blister can turn into a painful open wound after hours of wet sandstone and sand. The goal of this module is practical: recognize common problems early, treat what you reasonably can in the field, and know when the canyon day is over.

THE BIG IDEA: Self-sufficiency matters, but self-sufficiency does not mean refusing help. Serious symptoms, altered mental status, major bleeding, suspected fractures, breathing problems, or a rapidly worsening condition should trigger evacuation and professional medical help.

This module expands your existing first-aid overview. It is not a substitute for Wilderness First Aid/Wilderness First Responder training, CPR training, or professional medical advice.

FIRST 5 MINUTES: KEEP IT SIMPLE

When something goes wrong, do not let the whole group start solving five different problems at once. Slow the scene down and work through the priorities.

REASSESS: A patient who looked “mostly okay” ten minutes ago can look very different after pain, cold, dehydration, or continued movement. Recheck mental status, breathing, circulation below an injury, temperature stress, and the person’s ability to move.

TEAM MEDICAL BRIEF BEFORE THE CANYON

• Know where the first-aid kit and satellite communicator are located.

• Privately identify time-critical personal medications and allergies when relevant to the group.

• Know who has current first-aid/CPR/WFA/WFR training.

• Talk through the likely escape routes before you need one.

THE FIRST-AID KIT: SHARE THE LOAD

I recommend a compact, waterproof kit. The kit should be protected inside a dry bag, waterproof pouch, or waterproof case—and it should be easy enough to reach that nobody has to unpack the entire group at an awkward anchor.

TEAM IDEA: One person carries the waterproof first-aid kit while another carries the pull-cord or a rappel rope. On long approaches, rotate the heavier group items. Sharing the load saves energy and makes the team less dependent on one exhausted pack mule.

DROWNING: BREATHING IS THE PRIORITY

Protect yourself first; use a reach or throw assist from a secure position when possible. Entering hazardous water requires specific rescue training. After safe removal, an unresponsive person who is not breathing normally needs emergency activation and immediate CPR. Include breaths with compressions if trained and able; if unable to give breaths, give compressions until help takes over. Follow your CPR training and dispatcher instructions. Use an AED if available, but do not delay CPR to fetch one.

Do not spend time trying to drain water from the lungs. If the person is breathing, keep watching breathing and responsiveness, protect from cold, and arrange medical assessment. Significant or worsening cough, breathing difficulty, froth, or confusion after submersion requires urgent evacuation. Apparent recovery does not justify leaving the person alone.

Further reading: AHA drowning resuscitation guidance

HYPOTHERMIA:

A 100°F day above the canyon does not make cold-water immersion harmless. Water can remove body heat rapidly, and prolonged immersion can cause hypothermia even when the air feels warm. Deep shade, wind, wet clothing, fatigue, and repeated swims compound the risk. There is no single water-temperature cutoff that makes an unprotected swim safe.

WATCH THE PERSON

• Early clues: persistent shivering, fatigue, fumbling hands, poor coordination, slowing pace, or becoming unusually quiet. Worsening clues include slurred speech, confusion, irrational behavior, drowsiness, inability to walk normally, or shivering that decreases/stops despite continued cold exposure.

FIELD TREATMENT

• Get the person out of the water and out of wind or flowing water as soon as safely possible.

• In shelter, remove saturated clothing when practical and replace it with dry insulation. Insulate from the ground and cover the head and neck. Add a windproof or vapor-barrier layer over insulation; a thin foil blanket alone provides little insulation.

• Warm the trunk/core first. Wrap heat sources to prevent burns and follow their instructions. If fully alert and swallowing normally, offer warm, sweet, nonalcoholic drinks and calories. Confusion, inability to stay awake, or marked loss of coordination requires urgent help; handle the person gently and do not force them to walk.

CANYON RULE: Treat cold stress EARLY. Do not wait until the slow, shivering teammate becomes confused. Choose thermal protection for the water temperature—not just the air temperature—and keep a dry layer or emergency bivy sealed in a waterproof bag.

HEAT EXHAUSTION vs. HEAT STROKE

MORE WATER IS NOT ALWAYS BETTER

Dehydration is common, but excessive drinking can cause dangerous low sodium (exercise-associated hyponatremia), with symptoms resembling heat illness. During exertion, use thirst as a guide and avoid forced overdrinking. Eat during long days; sports drinks and salt do not prevent hyponatremia if fluid intake is excessive. A confused or collapsing teammate needs urgent assessment, not automatic instructions to drink more.

EVACUATE / GET HELP: Any change in mental status, seizure, collapse, inability to keep fluids down, worsening symptoms despite cooling/rest, or suspected heat stroke.

*CASE STUDY: ONE MILE FROM THE CAR WAS TOO FAR — ANGEL SLOT, 2022

On May 14, 2022, a group started Utah's Angel Slot around noon and began the exposed exit during the afternoon heat. A member with an existing medical condition developed severe cramping, difficulty walking, nausea, and vomiting. Progress slowed, the group ran low on fluids, and the patient resisted calling for help. The self-reporter recalled waiting about four hours before sending an SOS. Rescuers and a helicopter eventually reached the group. The patient was flown to the trailhead and assessed by medical personnel; everyone returned by approximately 11 p.m.

Lesson learned: Judge the exit by effort, exposure, and the person's condition, not distance alone. Discuss relevant medical needs privately before the trip, start early, and agree on escalation triggers. Worsening illness and inability to walk or retain fluids warrant prompt help. Confusion during heat exposure is an emergency requiring immediate cooling and rescue activation. A patient's determination to continue does not make continued exertion safe.

Think it through: Which changes would prompt your team to stop and request help?

ADDITIONAL READING

ICAD — Angel Slot 2022-05-14; first-hand account

FEET: HOT SPOTS, BLISTERS & ROLLED ANKLES

Feet take a beating in canyons: wet socks, sand, long approaches, side-hilling, boulder hopping, and hours of pressure inside wet footwear. The best foot first-aid often happens before there is a true injury.

HOT SPOTS & BLISTERS — TREAT THEM EARLY

• At the first rubbing/burning sensation, stop. Dry the foot as well as you can, remove sand or debris, change socks if possible, and adjust lacing/footwear.

• Protect a hot spot with moleskin, soft padding, hydrocolloid blister dressing, or appropriate athletic tape on clean, dry skin.

• For an intact blister, protect and pad it rather than automatically popping it. A donut-shaped pad can off-load pressure around the blister.

• If a blister is very large and painful and must be drained to continue safely, dermatology guidance supports sterile drainage at the edge while leaving the blister roof in place; clean and cover afterward. Infection risk goes up once skin is opened.

CANYON REALITY: Wet skin tears more easily. Carry a small foot-care kit where you can actually reach it—not buried underneath the rope bag. You are much more likely to use it if it is within reach. I know from experience.

ROLLED ANKLE / SPRAIN

• Stop and assess before asking the person to “walk it off.” Look for severe swelling, deformity, inability to bear weight, numbness/tingling, or a cold/pale foot.

• Limit use of the injured ankle. Use a wrapped cold pack for up to about 20 minutes if available and tolerated; wait before reapplying.

• An elastic wrap can provide support, but it should not cause numbness, tingling, color change, or increased pain. Recheck circulation beyond the wrap.

• Lighten the injured person’s pack. Trekking poles or partner assistance can help only if weight-bearing is reasonably safe and the ankle remains stable.

SUSPECTED BROKEN FOOT OR ANKLE

In the field, you often cannot confidently distinguish a severe sprain from a fracture. In a canyon, the practical question is: “Can we protect this limb and get this person out without making it worse?”

RED FLAGS FOR A SERIOUS INJURY

• Obvious deformity, bone through the skin, a “snap/pop” with major injury, severe pain/swelling, or inability to safely use the limb.

• Numbness, tingling, coldness, unusual color, or loss of normal sensation/movement below the injury.

• High-force fall, multiple injuries, shock, or an injury that makes self-evacuation unsafe.

FIELD FIRST-AID

• Do not force the foot or ankle straight. Keep it in the position found unless the scene itself is unsafe.

• Pad and immobilize the injured area with a commercial splint or improvised padded rigid supports. The goal is to reduce movement, not make a beautiful splint.

• Check circulation, skin color/temperature, sensation, and movement beyond the injury before and after splinting. Loosen or adjust if the splint causes new circulation or nerve problems.

• If there is an open wound, control bleeding and cover it. Do not push exposed bone back into the wound.

• Protect the person from heat/cold and plan evacuation. A foot/ankle fracture can turn a walking group into a carryout problem very quickly.

DO NOT GAMBLE ON MILES: If the person cannot bear weight safely, has deformity, impaired circulation/sensation, an open fracture, uncontrolled pain, or a high-force injury, use the fastest realistic evacuation/SAR option instead of forcing a long hike.

PAIN CONTROL

If the injured person normally uses an over-the-counter pain reliever safely, it may be used according to the product label and their personal medical guidance. Do not let pain medication become a reason to ignore a serious injury or keep pushing deeper into the canyon.

SCRAPES, BRUISES, CUTS & BLEEDING

SCRAPES & MINOR CUTS

• Put on gloves when available. Stop bleeding with direct pressure.

• Once controlled, clean the wound with clean treated water or saline and remove visible dirt/sand. Canyon abrasions are often dirty.

• Cover with a sterile dressing or bandage. Change a soaked/dirty dressing when practical and watch for increasing redness, warmth, swelling, pus, or worsening pain.

• Avoid pouring hydrogen peroxide into routine wounds; Red Cross training materials note it can damage tissue and delay healing.

BRUISES

• A wrapped cold pack can reduce pain/swelling; Red Cross guidance limits applications to about 20 minutes at a time.

• A bruise after significant trauma can also hide a deeper injury. Severe abdominal/chest pain, worsening swelling, faintness, or signs of shock deserve urgent evaluation.

LIFE-THREATENING BLEEDING

• Apply firm direct pressure to the bleeding source and maintain it.

• For life-threatening bleeding from an arm or leg, a commercial tourniquet is appropriate when indicated and within your training. Modern first-aid guidance does not treat it as a “last resort.”

• For wounds not suitable for a tourniquet, direct pressure and—when trained—wound packing/hemostatic gauze can be lifesaving.

CARRY THE SKILL, NOT JUST THE TOOL: A tourniquet or hemostatic gauze buried in a kit is not a plan. If you carry advanced bleeding-control supplies, take a recognized bleeding-control class and practice using them.

MOSQUITOES, TICKS & OTHER BITES

Mosquitoes and ticks are usually an annoyance until they are not. Prevention is easier than treating a vector-borne illness later, and tick checks are especially easy to forget after a long canyon day.

MOSQUITO / TICK PREVENTION

• Wear long sleeves/pants when practical. CDC also recommends 0.5% permethrin-treated clothing and gear; permethrin is for clothing/gear, not direct skin application.

• Check skin and clothing for ticks after approaches through brush/grass and again after the trip.

HOW TO REMOVE AN ATTACHED TICK

ALLERGIC REACTION / ANAPHYLAXIS

• Trouble breathing, throat/tongue swelling, wheezing, faintness, collapse, or a rapidly worsening reaction can signal anaphylaxis. Skin signs such as hives may be present, but do not wait for a rash before treating a serious reaction.

• Assist with the person's prescribed epinephrine according to their action plan and product instructions, and activate EMS/SAR immediately. Antihistamines do not replace epinephrine. Symptoms can persist or return, so a backup dose and a teammate familiar with the device matter. Continue monitoring; do not leave the person alone.

SNAKEBITE — NORTH AMERICAN GUIDANCE

• For a venomous or possibly venomous bite, call for emergency help immediately; do not wait for symptoms. Keep the person calm, minimize exertion without delaying care, remove constricting jewelry, and cover the bite with a clean, dry dressing. Do not try to catch or kill the snake.

• Do not cut or suck the wound, apply ice/electric shock, immerse it, or apply a tourniquet for snake venom.

UPSET STOMACH & DIARRHEA IN THE BACKCOUNTRY

An upset stomach is often more than an inconvenience in a technical canyon. Diarrhea and vomiting can quickly reduce hydration, energy, judgment, and the ability to keep up with the team. They also create sanitation challenges in places with no easy exit.

MILD DIARRHEA / STOMACH UPSET

• Stop, rest, and assess hydration. Use only treated/purified water.

• Replace fluids and salts with oral rehydration solution (ORS) when available. Mix the whole packet with exactly the volume of treated water stated on its label. ORS and ordinary sports-drink powder are not interchangeable; overly concentrated mixtures can make the problem worse.

• Take frequent small sips if the stomach is unsettled rather than chugging large amounts.

• Eat simple foods as tolerated. Continuing some food intake helps maintain energy during a long exit.

• For otherwise mild, non-bloody diarrhea, CDC notes that loperamide can reduce bowel frequency. It should not be used as the only treatment when there is bloody diarrhea or diarrhea with fever. Use only if it is normally safe for that person and follow the label.

TURN AROUND / EVACUATE FOR RED FLAGS

• Blood or black/tarry stool, high fever, severe or localized abdominal pain, fainting/confusion, persistent vomiting, or inability to keep fluids down.

• Worsening dehydration: very little urine, severe dizziness/weakness, dry mouth plus declining function, or inability to safely continue technical movement.

• A teammate who cannot reliably rappel, climb, or make decisions because of illness is no longer “just having an upset stomach.”

SANITATION MATTERS: Wash hands after toileting and before handling food or drinking water. Treat backcountry spring water unless it is explicitly identified as potable. Choose a source and treatment method appropriate to local hazards; clear water is not proof of safety.

* CASE STUDY: SEVERE NAUSEA AND VOMITING IN PINE CREEK — 2016

On May 25, 2016, Zion dispatch received a report of a 28-year-old canyoneer in Pine Creek who was very weak and suffering from severe nausea and vomiting. The group continued down canyon, but after the final rappel he became too weak to walk and was still vomiting.

Two park medics reached him that evening and provided treatment. After improvement, he was able to attempt the walk out and reached the main park road later that night.

Lesson Learned: A stomach illness can become a mobility and evacuation problem in a technical canyon. Persistent vomiting, worsening weakness, dehydration, or inability to move safely are reasons to stop treating the problem as “just an upset stomach” and reassess the trip.

ADDITIONAL READING:

Source: National Park Service — “Canyoneer sick in Pine Creek” (Zion National Park, incident May 25, 2016; posted July 11, 2016).

WHEN HELP IS MILES AWAY?

Remote first aid is not only about bandages. It is about making a decision while the person is tired, uncomfortable, and possibly miles from the exit. The safest choice is often made before the injury becomes dramatic.

CONTINUE, SELF-EVACUATE, OR CALL FOR HELP?

COMMUNICATING WITH RESCUERS

• Give canyon/route name, exact or best-known location, group size, patient age if known, what happened, current condition, treatment already given, hazards, and whether the team can move.

• After requesting help, follow instructions and avoid moving the patient unless movement improves safety or rescuers direct you to do so.

SHARE THE LOAD. SHARE THE SAFETY. A prepared team distributes ropes, pull-cords, medical gear, water-treatment tools, navigation, communication, and knowledge. Redundancy is not wasted weight when the day stops going according to plan.

QUICK REFERENCE: CANYON FIRST-AID

BEST NEXT STEP: Take a hands-on Wilderness First Aid (WFA) or Wilderness First Responder (WFR) course.

A printed first-aid module can remind you what to do; training gives you the practice to do it when somebody is cold, scared, injured, and miles from the trailhead.

BUILD YOUR OWN

FIRST-AID KIT

BUILD THE KIT IN FOUR MODULES

CORE CANYONEERING FIRST-AID KIT

MEDICATION MODULE – KEEP IT SIMPLE

PERSONAL MEDICAL MODULES: REDUNDANCY MATTERS

It’s recommended to add personal medications and supplies to your own personal first-aid kit. In a committing canyon, one damaged or lost pouch can become a much bigger problem, so critical items deserve a backup plan.

Example: Low Blood Sugar: THE TEAM SHOULD RECOGNIZE IT

In 1998 I was diagnosed with Type 1 Diabetes. My body doesn’t produce insulin so I need medicine on me along with a backup in my backpack, along with a backup in my tent. I also have copious amounts of sugar in my backpack in a dry bag so that I can raise my glucose when my blood sugar is trending low. In someone using insulin or other glucose-lowering medicine, shaking, sweating, unusual behavior, confusion, or weakness may be a good sign low blood sugar. Stop in the canyon and follow that person's treatment plan. If fully awake and able to swallow, a common adult plan is 15 grams (or 15 sugar cubes equivalent) of fast carbohydrate, then a glucose check after 15 minutes and repeat treatment if still low. Children may need a different amount. If unconscious, seizing, or unable to swallow, give nothing by mouth; activate emergency help and assist with prescribed glucagon according to its instructions and your training.

CANYON-SPECIFIC EXTRAS WORTH CONSIDERING