EMT · Primary Assessment · 6 min read
Circulation Assessment: Pulse and Skin Perfusion Signs
- Identify gross external bleeding and determine when catastrophic hemorrhage requires prioritizing circulation before airway and breathing.
- Select the correct anatomical pulse sites and evaluate arterial pulse rate, rhythm, and quality across adult, pediatric, and infant patients.
- Assess skin perfusion parameters, including color, temperature, moisture, turgor, and capillary refill, to identify clinical signs of hypoperfusion and shock.
Primary Assessment Priorities and Hemorrhage Control
The primary assessment is designed to rapidly find and correct immediate threats to life. Within this assessment, the circulation assessment evaluates the adequacy of blood flow to vital organs. The body relies on continuous perfusion to deliver essential resources to core tissues. When circulation is compromised, vital organs suffer rapid impairment, making a methodical circulatory survey a cornerstone of basic life support care.
During the primary assessment, an EMT immediately identifies and controls life-threatening external bleeding. Circulation assessment in the primary assessment specifically includes evaluating the patient's pulse, skin condition, and gross bleeding. During the primary assessment, an EMT checks for life-threatening external bleeding, including blood concealed by clothing or beneath the patient; a gloved-hand sweep can help find concealed external bleeding but cannot detect internal bleeding. This physical sweep allows the provider to inspect the gloves frequently for blood that might otherwise be concealed under heavy clothing or beneath the patient's body.
While patient care generally proceeds through airway, breathing, and circulation, severe bleeding alters this standard order. If catastrophic external bleeding is present, the EMT prioritizes circulation before airway and breathing. Life-threatening hemorrhage can drain the circulatory system of blood volume within moments, rendering subsequent airway and breathing efforts ineffective if the bleeding is not halted immediately.
Common mistakes
- Assuming an absent radial pulse with a present carotid pulse can be used to estimate a specific blood pressure, rather than recognizing it simply reflects poor peripheral perfusion.
- Searching for a pulse for longer than ten seconds on an unresponsive patient instead of promptly initiating chest compressions.
- Evaluating skin color exclusively on external skin surfaces in dark-skinned individuals instead of checking the conjunctiva, oral mucosa, nail beds, or palms.
- Failing to immediately prioritize life-threatening, catastrophic external bleeding over standard airway and breathing assessments.
Key points
- The circulation assessment evaluates blood flow to vital organs through the examination of pulse, skin perfusion, and gross bleeding.
- Catastrophic external bleeding requires immediate control before airway and breathing assessment; during the primary assessment, check for external bleeding concealed by clothing or beneath the patient, using a gloved-hand sweep when appropriate.
- Pulse sites are chosen by age and responsiveness: the radial pulse for responsive adults and children over one year, the carotid for unresponsive adults and children over one year, and the brachial for infants under one year.
- When assessing an unresponsive adult, child, or infant who is not breathing normally, check for a pulse for at least five but no more than ten seconds and start CPR if no pulse is definitely felt; newly born infants follow the newborn resuscitation sequence.
- A normal adult resting heart rate is 60 to 100 beats per minute, with tachycardia exceeding 100 beats per minute and bradycardia falling below 60 beats per minute.
- Skin perfusion assessment evaluates color, temperature, moisture, and turgor, with pale, cool, and clammy skin serving as a classic sign of hypoperfusion and shock.
- Pediatric bradycardia is an ominous sign of severe hypoxia, while newborn resuscitation mandates bag-mask ventilation for heart rates under 100 beats per minute and chest compressions if the heart rate remains below 60 beats per minute after 30 seconds of effective ventilation.
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