cpr for medical undergraduates

BY

Professor of Internal MedicineZagazig University

2015

DR MONKEZ M YOUSIF

CPR

OBJECTIVES• Recognise cardiac arrest.

• How to perform chest compression and rescue breathing.

• Differentiate between shockable and

non- shockable rhythm.

• Understand Principal Drugs (Atropine–Adrenaline-

Amiodarone).

• Case presentations.

CASE 1

• You find a 72-year-old man lying unresponsive in

a restroom of a local airport. He is alone, and

you don't know how long he has been

unconscious. You speak loudly, trying to wake

him up, and you shake him; he continues to be

unresponsive.

What should be your sequential response in

this situation?

CASE 2

• A 56-year-old woman is found pulseless in her

room at a local hospital. The nurse calls "code

blue," and you are the first doctor responding.

• The nurse has started CPR, and the patient has a

patent I.V. line. After 2 minutes, the patient is still

pulseless. A defibrillator has now been brought to

the room.

What is the best intervention to take next in the

care of this patient?

What is CPR• Cardiopulmonary Resuscitation (CPR) consists of

chest compression and mouth-to-mouth respiration .

• CPR allows oxygenated blood to circulate to vital

organs such as the brain and heart.

• CPR can keep a person alive until more advanced

procedures (such as defibrillation - an electric shock

to the chest) can treat the cardiac arrest.

Cardio Pulmonary Resuscitation

• BLS – basic life support.

• ACLS – advanced cardiac life support.

Causes of Cardiac Arrest

8

Causes of cardiac arrest

Cardiac

Extracardiac

Primary lesion of cardiac muscle leading to the progressive decline of contractility, conductivity disorders, mechanical factors

All cases accompanied with hypoxia

9

Causes of circulation arrest

Cardiac• Ischemic heart disease • Arrhythmias of different

origin and character• Electrolytic disorders• Valvular disease• Cardiac tamponade• Pulmonary artery

thromboembolism• Ruptured aneurysm of aorta• Hypertrophic obstructive CM

Extracardiac• Airway obstruction• Acute respiratory failure• Shock• Embolisms of different origin• Drug overdose• Electrocution• Poisoning

Cardiac Arrest

• Brain damage begins 4 - 6 minutes after

cardiac arrest

• Brain damage becomes irreversible in

8 - 10 minutes

Chain of Survival for OHCA

Andrew H. Travers et al. Circulation. 2010;122:S676-S684

1. Immediate recognition and activation 2. Early CPR 3. Rapid defibrillation 4. Effective advanced life support 5. Integrated post-cardiac arrest care

Basic life support (BLS)

Implies that no equipment is employed other than a protective device.

Consists of chest compression mouth-to-mouth respiration and

Steps of CPR (3 Cs)1) Check

• Scene• Injuries• Consciousness

2) Call• EMS

3) Care• C-A-B-D

CHECKEstablish Unresponsiveness

• Tap victim on shoulder and ask “Are you OK?”

Check Pulse• Check carotid pulse• Check for 5-10

seconds• If you are not sure if

the victim has a pulse, start CPR

• Unnecessary CPR is less harmful than not performing CPR that is needed

Check for Breathing• Look, Listen

and Feel for Breathing (for at least 5 seconds and not more than 10)

CALLActivate EMS

• If victim is unresponsive, activate EMS immediately

• Instruct a bystander to call• If you are alone, you must activate EMS before performing any other step• If unresponsive & victim is breathing, place in recovery position

Patient unresponsive with no breathingStart CPR

C-A-B-D

CARE

CAREHand Placement for Chest Compression• Place the heel of one

hand in the center of the victim’s bare chest between the nipples

• Put the heel of your other hand on the top of your first hand

• Straighten your arms and position your shoulders directly over your hands

Put hand(s) in correct position for chest compressions

Chest Compressions• Push hard and fast—rate

of 100 per min• Press down 1 ½- 2 inches

with each compression• For each compression

press straight down• At the end of the

compression allow the chest to recoil or re-expand completely

Opening the Airway• Head tilt – Chin lift• Remove any visible objects from mouth• If victim has possible spinal injury, use jaw thrust without a head

tilt

Jaw-thrust maneuver

Used on patients with a suspected spinal injury and is used on a supine patient.

Prevents the tongue from obstructing the upper

airways.

Give 2 Breaths• Pinch the nose closed with

your thumb and index finger• Take a regular breath and

seal your lips around the victim’s mouth, creating an airtight seal

• Slowly breath air into victim’s mouth until victim’s chest rises

• Remove your mouth to let the air come out

• Repeat one more breath

Recheck Circulation• Cycle=30

compressions and 2 breaths

• Recheck pulse after 5 cycles

During CPR

• Push hard & fast (100-120/min)

• Compressions to relaxation ration 50:50

• Ensure full chest recoil

During CPR• Avoid hyperventilation• Secure airway & confirm placement• Rotate compressors every 2min with

rhythm checks• After an advanced airway is placed,

rescuers no longer deliver “cycles” of CPR. Give continuous chest compressions without pause for breaths. Give 6-8 breaths/min. check every 2min.

CPR Pushing on the Chest

• Sometimes you may hear a cracking sound.

• The sound is caused by cartilage or ribs cracking.

• Even if this occurs the damage is not serious.

• The risk of delaying CPR or not doing CPR is far greater than the risk of a broken rib.

BLS Dos and Don’ts of Adult High-Quality CPR

Rescuers Should Not Rescuers Should

Compress at a rate slower than 100/min or faster than 120/min

Perform chest compressions at a rate of 100-120/min

Compress to a depth of less than 2 inches (5 cm) or greater than 2.4 inches (6 cm

Compress to a depth of at least 2 inches (5 cm)

Lean on the chest between compressions

Allow full recoil after each compression

Interrupt compressions for greater than 10 seconds

Minimize pauses in compressions

Provide excessive ventilation(ie, too many breaths or breaths with excessive force)

Ventilate adequately (2 breaths after 30 compressions, each breathdelivered over 1 second, each causing chest rise)

When to Stop CPR• Victim is revived• Replaced by another

equally trained person or physician assumes responsibility

• Exhaustion• Scene becomes unsafe• Physician direction to

stop

Simplified Adult BLS Algorithm.

Andrew H. Travers et al. Circulation. 2010;122:S676-S684

In Hospital Resuscitation

• In hospital resuscitation differs in ;

- location (monitored),

- training of the first responder,

- number of responders,

- equipment available and

- resuscitation team.

Physiology: Acute changes in:−Threatened Airway−All respiratory arrests−Respiratory rate <5/ min −Respiratory rate >36/ min

Breathing

−Pulse rate <40/min−Pulse rate >140/min−Systolic BP <90 mmHg

Circulation

−Sudden in level of consciousness−Decrease in GCS >2points−Repeated or prolonged seizures

Neurology

−Any patient - causing concern who does not fit the above criteria

Other

Predictors of cardiac arrest

Sequence for collapsed patient in a hospital

1) Ensure personal safety:– Your personal safety and that of resuscitation

team members is the first priority. – Check that the patient’s surroundings are safe. – Put on gloves as soon as possible, eye

protection and face mask may be necessary.

2) Check the patient for a response: If you see a patient collapse or apparently unconscious, -shout for help -assess response by gently shaking the victim and ask loudly, "Are you OK?“

3) If he has a pulse or signs of life: ABCDE

4) If he has no pulse or signs of life:call the resuscitation team and start CPR immediately

5) If he is not breathing and has a pulse ( respiratory arrest): keep ventilation and check for a circulation / 10 breath.

6) If the patient has a monitored and witnessed cardiac arrest:– Confirm cardiac arrest and shout for help.

– Give precordial thump if the rhythm VF/ VT

or defibrillator is not to hand immediately, and

start CPR.

– Success if done 10 sec of VF

Deliver a sharp impact to the lower half of the sternum from a height 20 cm, using the ulnar edge of a tightly clenched fist.

Airway (A): Airway obstruction hypoxia, and risk damage to

brain, kidneys, heart, cardiac arrest and even death.

Signs of obstruction: stridor, wheeze, gurgling,

snoring..TTT: Airway clearance Airway opening maneuvers, suction,

Insertion of an oropharyngeal or nasopharyngeal airway

Tracheal intubation.

Use high concentration oxygen with sufficient flow (>10

L/ min.).

Oropharyngeal

Laryngeal mask

Tracheal tubes

Nasopharyngeal airway

Breathing (B):Diagnose and treat immediately life- threatening condition,

- acute severe asthma, - pulmonary edema, - tension pneumothorax, - massive hemothorax.

Look, listen and feel for general signs of respiratory distress;

- sweating, central cyanosis, - use of accessory ms of resp, abd breathing. - resp rate, depth, JVP, record oxygen saturation %,

TTT: give oxygen, use bag-mask or pocket mask ventilation if rate and depth of breathing is inadequate.

bag-mask pocket mask

Circulation (C) :Look for color and temperature of the handAssess state of veins, peripheral and central

pulseMeasure BP, auscultate the heart.Look for signs of poor cardiac output

(reduced conscious level and oliguria)Treat urgently life threatening conditions,

• cardiac tamponade, massive or continued hge, septicemic shock.

Insert IV cannula, give fluids, reassess HR and BP/5min. 12-lead ECG monitoring

Disability (D):• Common causes of unconsciousness include

− profound hypoxia, − hypercapnea, − cerebral hypo perfusion or − recent administration of sedatives or

analgesics.• Exclude or treat hypoxia and hypotension• Check drug chart and give antagonist• Measure bl gl and give glucose if<50mg/dl.• Rapid initial assessment of conscious level using

Glasgow coma scale• Nurse unconscious patients in lateral position if their

airway is not protected.

Glasgow Coma Scale Score4 Spontaneous Eye Opening3 To Speech2 To Pain1 Nil

5 Oriented Verbal Response4 Confused 3 Inappropriate words2 Incomprehensive sounds 1 Nil

6 Obeys commands Motor Response5 Localizes4 Normal flexion 3 Abnormal flexion 3 Abnormal extension 1 Nil

Exposure (E):• To examine the patient properly full exposure of

the body may be necessary. Respect the patient dignity and minimize heat loss.

• Additional information:-Take a full history-Review the patient notes and charts-Review the results of lab and radiology-Assess, treat and record response to treatment-Consider definitive treatment of underlying condition.

Problems with CPR Technique• CPR often ineffective because of poor technique

• Compressions not delivered steadily and constantly during resuscitation efforts

• Often compressions are too shallow, resulting in ineffective blood flow

• Compressions may be given at too fast a rate

Advanced Life SupportALS

Advanced Life SupportInterventions intended to achieve

1- Adequate ventilation,

2- Control cardiac arrhythmias,

3- Stabilize blood pressure and cardiac output

4- Restoration of spontaneous circulation

5- Protection of the central nervous system

Advanced Life SupportThe activities carried out to achieve these goals include 1) Defibrillation / cardioversion and/or pacing,2) Anti-arrhythmic medications3) Intubation with an endotracheal tube, and 4) Insertion of an intravenous line.

Immediate defibrillation should precede intubation and insertion of an intravenous line; CPR should be carried out while the defibrillator is being charged.

Advanced life support algorithm:

Heart rhythms associated with CA are either:– Shockable rhythm

• VF • pulseless VT

– Non-shockable rhythm • Asystole • pulseless electrical activity PEA

Asystole

Pulseless electrical activity (electromechanical dissociation)

Treatment of shockable rhythm:

- If VF/VT is confirmed, follow the algorithm of European

Resuscitation Council ERC Guidelines for Resuscitation,

2010.

- Attempt defib. Give one chock of 150-200 biphasic or

360 j monophasic.

- Immediately resume CPR 30-2 without assessing the

rhythm or feeling the pulse for 2 min.

- If VF/VT persists give 2nd shock of 150-360 biphasic or

360 j monophasic. and resume CPR for 2 min

− If VF/VT persists give 3rd shock of 150-360 biphasic

or 360 j monophasic. resume CPR for 2 min.

− Pause briefly to check the monitor.

− If VF/VT persists give adrenaline 1 mg IV and

amiodarone 300 mg IV followed by 4th shock of 150-

360 biphasic or 360 j monophasic. resume CPR for 2

min.

− Pause briefly to check the monitor.

− Give adrenaline 1mg IV immediately before alternate

shocks ( every 3-5min).

Non-shockable rhythm – survival following CA with asystole or PEA, is

unlikely unless a reversible cause can be found and treated quickly and effectively.

• Treatment − Start CPR 30-2− Give adrenaline 1 mg IV as soon as I.V

access is achieved.− Continue CPR 30-2 until airway is secured,

then continue chest compression without pausing during ventilation.

− Recheck the rhythm after 2 min:

During CPR: consider potential causes or aggravating factors during CA.

6 H’sHypovolemiaHypoxiaHydrogen ion (acidosis)Hypo-/HyperkalemiaHypoglycemiaHypothermia

5 T’sToxinsTamponadeThrombosis (coronary or pulmonary)Tension PTxTrauma

Post–cardiac arrest care algorithm

Mary Ann Peberdy et al. Circulation. 2010;122:S768-S786

CASE 1

• You find a 72-year-old man lying unresponsive in

a restroom of a local airport. He is alone, and

you don't know how long he has been

unconscious. You speak loudly, trying to wake

him up, and you shake him; he continues to be

unresponsive.

what should be your sequential response in

this situation?

• The resuscitation of an adult victim of sudden

cardiac arrest should follow an orderly sequence,

no matter where the patient collapse occurs.

• This sequence is called the chain of survival.

CASE 2

• A 56-year-old woman is found pulseless in her room at a local hospital. The nurse calls "code blue," and you are the first doctor responding. The nurse has started CPR, and the patient has a patent I.V. line. After 2 minutes, the patient is still pulseless. A defibrillator has now been brought to the room.What is the best intervention to take next in the care of this patient?

• In the chain of survival, the importance of rapid access to defibrillation cannot be ignored.

• In a patient who is dying from a shockable rhythm, the chance of survival declines by 7% to 10% for every minute that defibrillation is delayed.

• Early defibrillation is so critical that if a defibrillator is immediately available, its use takes precedence over CPR in patients with pulseless VT or VF.

• If CPR is already in progress, it should be halted while defibrillation takes place.

Questions

1. Success of any resuscitation attempt is built on:

A. high quality CPR B. defibrillation when required by the patients ECG rhythm C. neither 1 or 2 D. both 1 and 2

2) The most important algorithm to know for adult resuscitation is:

A. Bradycardia B. PEA C. Tachycardia D. Cardiac Arrest

3) The systematic approach with a person in cardiac arrest should include the BLS survey and the ACLS survey?

A. True B. False

4) While conducting the BLS Survey, you should do all of the following except:

A. check patient responsiveness

B. activate emergency response system

C. open the airway

D. get an AED

5) According to new 2010 Guidelines for CPR, which of the following is in the correct order for the patient with sudden cardiac arrest?

A. open airway, provide ventilations, give 30 chest compressions, attach AED as soon as possible

B. give 30 compressions, open airway, provide ventilation, attach AED as soon as possible

C. open airway, check breathing, check pulse , attach AED as soon as possible

D. none of the above

6) After providing a shock with an AED you should:

A. Start CPR, beginning with chest compressions

B. check a pulse

C. give a rescue breath

D. let the AED reanalyze the rhythm

7) During CPR with no advanced airway in place the compression-to-ventilation ratio is:

A. 5:1 B. 30:2 C. 10:1 D. 20:2

8) During CPR after an advanced airway is in place, which of the following is true:

A. Breaths should be synchronized with the chest compressions.

B. The goal is 20 or greater breaths per minute C. Chest compressions should be stopped while giving

breaths. D. One breath every 6 to 8 seconds should be given

9) The most important intervention with witnessed sudden cardiac arrest is:

A. early defibrillation

B. effective chest compressions

C. early activation of EMS

D. rapid use of resuscitation drugs

1) Typically, suctioning attempts in ACLS situations should be:

A. 10 seconds or less B. 20 seconds or less C. 5 seconds or less D. no more than 30 seconds

Thank you

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BLS healthcare provider algorithm.

Robert A. Berg et al. Circulation. 2010;122:S685-S705

cpr for medical undergraduates

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