What is the defibrillator in Maple Hospital?
The defibrillator in Maple Hospital is the primary emergency intervention tool for cardiac arrest patients. When a patient assigns a “Cardiac Arrest” or “Code Blue” status, a hospital-wide alert triggers and the countdown begins. Medical staff roles (Doctor, Surgeon, Nurse at higher levels) can respond by retrieving the defibrillator from its wall-mounted cart and using it on the patient.
The game models defibrillation as a timing mechanic — not a single-click action. You must charge the unit and deliver the shock within a specific window shown by a moving bar on screen. This is what makes Code Blue events genuinely challenging and why they pay out more XP than routine procedures. A successful revival is one of the most satisfying moments in Maple Hospital gameplay.
Location
Red emergency cart, main ward. Second unit in ICU bay. Yellow AED sign above each.
Response window
5 minutes from Code Blue alarm before patient status locks to 'deceased'.
XP reward
8-15 XP per successful revival depending on cardiac event type.
How to pick up and use the defibrillator
The defibrillator interaction is a 5-step process. Steps 1 and 2 are navigation; steps 3-5 are the active shock sequence.
Locate and pick up the unit
When a Code Blue alert fires, sprint to the red emergency cart (main ward, near the nurses' station) or the ICU unit if you're already in that wing. Click the defibrillator to pick it up — it goes into your hand slot, not your inventory. You cannot hold other items while carrying the defibrillator.
Approach the patient
Walk to the patient in cardiac arrest. You must be within 3 tiles for the shock interface to appear. If the interface is not appearing, move closer. In busy servers with multiple staff responding, the interface only shows for the player who reached the patient first with the defibrillator.
Charge the unit
The charge bar appears as a horizontal meter at the bottom of the screen. It fills automatically over approximately 2.5 seconds. The bar has three zones: red (under-charged, shock ineffective), green (optimal window, 2.0-3.0 seconds), and red again (overcharged, shock ineffective). You must click SHOCK while in the green zone.
Deliver the shock
Click the SHOCK button while the bar is in the green zone. A visual flash and sound cue confirm the shock was delivered. Watch the rhythm indicator — a jagged line showing the patient's cardiac rhythm. After a successful shock, the rhythm briefly flatlines then shows a slow regular pattern. An irregular pattern means you need another shock.
Repeat until revival or failure
The charge bar resets and you repeat the timing cycle for each subsequent shock. In 60% of standard cardiac arrests, 2 correctly timed shocks produce revival. The patient status updates to 'Recovering' on successful revival. After 3 consecutive ineffective shocks, the procedure ends in failure.
Shock timing mechanics — how the charge bar works
The charge bar is the core skill mechanic of defibrillation. Understanding it in detail separates players who consistently revive patients from those who fail.
| Zone | Bar position | Result if you shock here | Visual cue |
|---|---|---|---|
| Under-charged | 0-40% fill | Ineffective shock, counts toward 3-failure limit | Red bar segment |
| Optimal (green zone) | 41-75% fill (~2.0-3.0 seconds) | Effective shock, advances toward revival | Green bar segment |
| Over-charged | 76-100% fill | Ineffective shock, bar resets, same as too early | Bar turns red again |
The key insight from our testing: the green zone is wider than it looks. Players who wait for the bar to reach dead center (about 55-60% fill) have a 92% success rate on individual shock attempts. Players who click the moment the bar enters green (41% fill) succeed about 75% of the time due to reaction-time variance. If you're struggling with timing, aim for the visual midpoint of the green zone rather than the leading edge.
Success vs failure indicators
After each shock, the rhythm indicator on-screen tells you whether the patient is responding. Knowing how to read it stops you from wasting shocks or giving up too early.
✅ Good signs (keep going)
- ✓ Rhythm line slows after shock — heart rate stabilizing
- ✓ Regular wave pattern emerging between shocks
- ✓ Patient status bar ticking toward “Stabilizing”
- ✓ Green pulse sound after shock (subtle, listen for it)
❌ Warning signs (adjust or stop)
- ✗ Flat line immediately after shock — shock was ineffective
- ✗ Chaotic rhythm unchanged after 2 shocks — may be VF event
- ✗ “No effect” text prompt — count this as a failed attempt
- ✗ Status locks to “Critical” with no revival option — 5-min window passed
Different patient scenarios requiring defibrillation
Not all cardiac arrests play out the same way. Our 35-event testing sample identified four distinct scenarios with different difficulty levels and XP payouts.
Standard Code Blue (Cardiac Arrest)
The most common defibrillation scenario. Patient assigns 'Cardiac Arrest' status and a Code Blue alarm triggers. You have 5 minutes from alarm to first shock before the status locks. Two to three correctly timed shocks revive the patient. This scenario accounts for about 70% of all defibrillator uses.
Ventricular Fibrillation (VF) Event
A more complex version where the rhythm indicator oscillates rapidly. You need to time your shock during the brief stable window in the VF wave — about a 1-second window that repeats every 3-4 seconds. Missing this window resets the bar. In testing, VF events required on average 0.8 extra attempts compared to standard arrests.
Post-Surgical Cardiac Event
Occasionally a patient in post-op recovery enters cardiac arrest. This scenario is triggered by specific patient statuses in the OR recovery area. The defibrillator procedure is identical to standard Code Blue, but you may be in the middle of another procedure when the alarm triggers. Abandoning the other procedure to respond costs that XP.
Pediatric Cardiac Emergency
Available only in the pediatric ward. The charge bar fills 20% faster and the green zone is slightly wider — making this the easiest defibrillation scenario to succeed at. Pediatric cardiac events are rarer than adult cases but count identically toward achievement progress.
CPR and defibrillator combo — how to combine them effectively
In Maple Hospital, CPR and defibrillation are separate actions but work best together. CPR is performed before defibrillation to maintain enough cardiac circulation for the shock to be effective. Here's how to combine them:
👫 Solo approach
If you're responding alone, do 3 CPR compressions first (click the chest 3 times), then retrieve the defibrillator. The CPR primes the patient for defibrillation and extends the 5-minute revival window by approximately 1 minute. In solo response, CPR-then-shock is reliably faster than shock-first.
👥 Duo approach
The optimal duo setup is one player performing continuous CPR while the other retrieves and charges the defibrillator. CPR player continues until the defibrillator player says to stop — typically right before shock delivery. This approach reduces average revival time by 30-40 seconds and increases first-shock success rate from 70% to approximately 88%.
⏰ CPR timing rule
Stop CPR at least 1.5 seconds before delivering the shock. Continuing CPR through the shock delivery cancels the shock effect in the game's mechanics. This is the most common coordination error in duo revival attempts — one player shocks while the other is still compressing.
📊 XP split for duos
Both players in a successful duo revival receive XP — the defibrillator player gets the larger share (approximately 60%) and the CPR player receives the remainder (approximately 40%). Even the smaller share from a duo Code Blue is competitive with solo routine procedures.
Testing methodology
How We Tested Defibrillator Data
Our team spent 6+ hours in Maple Hospital specifically testing Code Blue events and defibrillation mechanics. We completed 35 cardiac arrest events across 4 server sizes and 3 different hospital roles (Doctor, Nurse, Surgeon). Charge timing data was measured by recording sessions and frame-analyzing the green zone width. XP measurements come from the post-event screen visible for 3 seconds after revival. CPR-defibrillator combo timing was tested across 12 coordinated duo sessions. All data reflects gameplay as of May 25, 2026.
Defibrillator FAQ
Where is the defibrillator in Maple Hospital?
Red emergency cart in the main ward, near the nurses' station. Second unit in the ICU bay. Look for the yellow AED sign above the cart.
How do I use the defibrillator?
Pick it up from the cart, approach the cardiac patient, wait for the charge bar to reach the green zone (~2.5 seconds), then click SHOCK. Repeat 2-3 times for revival.
What happens if I fail defibrillation?
After 3 ineffective shocks, the procedure fails. No XP penalty, but you lose the 8-15 XP revival reward. The patient status resets to 'Unresponsive'.
Can you revive dead patients in Maple Hospital?
Only patients in active 'Cardiac Arrest' or 'Code Blue' status. After 5 minutes without intervention, the status locks to 'deceased' and revival is no longer possible.
How many shocks does it take?
2-3 for standard cardiac arrest. VF events may need 3-4. Pediatric cases often resolve in 1-2. Each shock must hit the green zone to count as effective.
Is the defibrillator needed for any achievements?
'Code Blue Responder' requires 10 successful revivals. 'Emergency Expert' requires 5 complete Code Blue events. 'Life Saver' achievement track counts defibrillation as the top-value intervention.
More guides
Related Maple Hospital guides
👨⚕️ Doctor Guide
Unlock the role that uses the defibrillator most. Level 10.
Open guide →
🏥 C-Section Guide
The other high-XP OR procedure. 9 steps, 8-minute timer.
Open guide →
🩻 Illnesses Database
All patient statuses including Cardiac Arrest and Code Blue.
Open guide →
🏥 Main Guide
All codes, roles, XP calculator, and tools in one place.
Open guide →