Vital Signs Assessment — Study Notes OmpathStudy

Vital signs are objective measurements of the body's fundamental physiological functions, serving as critical indicators of an individual's health status, disease progression, and response to treatment. The primary vital signs include temperature, pulse, respirations, blood pressure, oxygen saturation, and pain, providing essential data for clinical assessment. Key Points- Blood pressure reflects cardiac output and peripheral vascular resistance, with specific normal ranges varying by age group. Mean Arterial Pressure (MAP) is a crucial measure for assessing organ perfusion, ideally maintained at 60 mmHg or higher. Pulse is assessed by rate and quality at various arterial sites, with abnormal rates categorized as tachycardia or bradycardia. Body temperature classifications range from hypothermia to hyperthermia, with rectal measurement being the most accurate for core temperature, especially in infants. Respiration assessment includes rate and pattern, where abnormal patterns like Cheyne-Stokes or Kussmaul indicate underlying medical conditions. Oxygen saturation (SpO2) typically ranges from 95-100%, though specific targets exist for conditions like COPD, and accuracy can be influenced by several factors. Pain is a subjective vital sign assessed using various scales adapted for different patient populations and can be thoroughly characterized using the PQRST framework. Certain critical deviations in vital signs necessitate immediate medical intervention to prevent serious adverse outcomes. Detailed Notes### IntroductionVital signs are objective measurements of the body's most basic physiological functions. They serve as indicators of health status, disease progression, and response to treatment. The cardinal vital signs include: Temperature (T) , Pulse (P) , Respirations (R) , Blood Pressure (BP) , Oxygen Saturation (SpO2) , and Pain . 1. Blood Pressure (BP)#### Definition and Physiology Blood pressure is the force exerted by circulating blood against arterial walls. It reflects cardiac output , peripheral vascular resistance , and blood volume . Pediatric Normal Values Newborn : 65-95/30-60 mmHg Infant (1-12 months) : 80-100/55-65 mmHg Toddler (1-2 years) : 90-105/55-70 mmHg Preschool (3-5 years) : 95-110/60-75 mmHg School age (6-12 years) : 100-120/60-80 mmHg Adolescent (13+ years) : Adult values Mean Arterial Pressure (MAP) Formula : MAP = Diastolic BP + 1/3(Systolic BP - Diastolic BP) Normal Range : 70-100 mmHg Minimum for organ perfusion : 60 mmHg Optimal for critically ill : 65-70 mmHg Assessment Technique Patient seated/lying, arm at heart level. Cuff should cover 80% of arm circumference. Inflate 20-30 mmHg above palpated systolic pressure. Deflate at 2-3 mmHg/second. Note first Korotkoff sound ( systolic ) and disappearance ( diastolic ). Hypertension Management Non-Pharmacological : DASH diet (sodium <2300mg/day), weight maintenance (BMI 18.5-24.9), 150 mins exercise/week, smoking cessation. Pharmacological : ACE Inhibitors, ARBs, Beta-blockers, Calcium Channel Blockers, Diuretics. 2. Pulse and Heart Rate#### Normal Values by Age Adults : 60-100 bpm Tachycardia : 100 bpm Bradycardia : <60 bpm Pulse Quality/Amplitude 0 : Absent 1+ : Weak, thready 2+ : Normal 3+ : Strong, bounding 4+ : Very strong, not easily obliterated Pulse Sites Temporal, Carotid, Brachial, Radial (most common), Femoral, Popliteal, Dorsalis pedis, and Posterior tibial. 3. Body Temperature#### Classifications Hypothermia : <36°C Normal : 36-37.5°C Low-grade fever : 37.5-38.3°C Moderate fever : 38.3-40°C High fever : 40°C Hyperthermia : 41°C Assessment Methods Oral : Most common; wait 15-30 mins after eating/drinking. Rectal : Most accurate core temperature; gold standard for infants <3 months. Axillary : Safest but least accurate (reads ~0.5°C lower than core). Tympanic : Quick; requires proper ear canal alignment. 4. Respirations#### Assessment Parameters Normal Adult Rate : 12-20 breaths/minute. Bradypnea : <12 breaths/min. Tachypnea : 20 breaths/min. Apnea : Absence of breathing 15-20 seconds. Abnormal Patterns Cheyne-Stokes : Cycles of increasing/decreasing depth followed by apnea. Kussmaul : Deep, rapid respirations (common in DKA ). Biot's : Irregular depth and rate with sudden apneic periods. 5. Oxygen Saturation (SpO2)- Normal : 95-100% COPD Target : 88-92% may be acceptable. Critical threshold : <90% Factors affecting accuracy : Poor peripheral circulation, hypothermia, nail polish, carbon monoxide poisoning (falsely high). 6. Pain Assessment#### Pain Scales Numeric Rating Scale : 0-10 (0=none, 10=severe). Wong-Baker FACES : For children 3 years. FLACC Scale : For non-verbal patients (Face, Legs, Activity, Cry, Consolability). PQRST Framework P rovocation/Palliation Q uality R egion/Radiation S everity T iming Critical Values Requiring Immediate Intervention- Temperature : 38.5°C or <36°C Heart Rate : <50 or 120 bpm Respirations : <10 or 30 breaths/minute Blood Pressure : Systolic <90 or 180, Diastolic 110 mmHg SpO2 : <9