Chapter 29: Vital Signs Vocabulary Review

Vocabulary flashcards generated for Chapter 29 Vital Signs from Potter & Perry's Fundamentals of Nursing, 12th Edition.

Vital Signs

Frequent measurements that reflect circulatory, respiratory, neural, and endocrine function, often providing the first objective evidence of a change in patient condition.

Newborn Average Temperature Range

$$36.5\text{--}37\,^\circ\text{C}\ (97.7\text{--}98\,^\circ\text{F})$$

Newborn Normal Pulse Range

$$85\text{--}190\,\text{beats/min}$$

Newborn Normal Respiration Range

$$30\text{--}60\,\text{breaths/min}$$

Newborn Mean Blood Pressure

$$40\,\text{mmHg}\ \text{(mean)}$$

1-Year-Old Normal Pulse Range

$$100\text{--}140\,\text{beats/min}$$

1-Year-Old Normal Respiration Range

$$25\text{--}35\,\text{breaths/min}$$

School Age Normal Respiration Range

$$20\text{--}25\,\text{breaths/min}$$

Adolescent Normal Pulse Range

$$60\text{--}90\,\text{beats/min}$$

Adult Normal Body Temperature Range

$$36\text{--}<38\,^\circ\text{C}\ (96.8\text{--}<100.4\,^\circ\text{F})$$

Adult Normal Pulse Range

$$60\text{--}100\,\text{beats/min}$$

Adult Normal Respiration Range

$$12\text{--}20\,\text{breaths/min}$$

Adult Normal Blood Pressure Target

$$<120/80\,\text{mmHg}$$

Older Adult Average Body Temperature Range

$$35\text{--}36.1\,^\circ\text{C}\ (95\text{--}97\,^\circ\text{F})$$

Fever Definition Threshold

A body temperature above $38\,^\circ\text{C}\ (100.4\,^\circ\text{F})$ in a child or adult.

Core Temperature

The temperature of deep tissues such as the thorax, abdomen, and cranium, which remains relatively constant.

Surface Temperature

The temperature of skin, subcutaneous tissue, and fat, which varies with environmental conditions.

Anterior Hypothalamus

The part of the brain that senses warmth and triggers heat-loss responses such as sweating and vasodilation.

Posterior Hypothalamus

The part of the brain that senses cold and triggers heat-conservation responses such as vasoconstriction, shivering, and piloerection.

Thermoregulation

The physiological balance between heat produced by the body and heat lost to the environment.

Basal Metabolic Rate (BMR)

The baseline rate of body heat production generated by metabolic activities at absolute rest.

Nonshivering Thermogenesis

Vascular heat production occurring primarily in neonates who rely on brown fat tissue breakdown.

Radiation (Heat Loss)

The transfer of heat from the surface of one object to the surface of another without direct contact.

Conduction (Heat Loss)

The transfer of heat from one object to another through direct contact.

Convection (Heat Loss)

The transfer of heat away from the body by air movement.

Evaporation (Heat Loss)

The transfer of heat energy when a liquid is changed to a gas, such as during diaphoresis.

Circadian Rhythm Effect on Temperature

Body temperature is typically lowest early in the morning and highest in the late afternoon.

Progesterone Effect on Body Temperature

Hormonal secretions during ovulation that cause predictable body temperature fluctuations.

Thyroid Hormone Effect on Body Temperature

Hormonal secretion altering basal metabolic rate, directly influencing metabolic heat production.

Stress Effect on Body Temperature

Sympathetic nervous system stimulation increasing metabolic activity and raising body heat production.

Oral Temperature Route Advantage

An easily accessible and comfortable site for obtaining body temperature measurements.

Oral Temperature Route Limitations

Inaccurate immediately following oral intake, and unsafe for patients who are confused or experiencing seizures.

Rectal Temperature Route Advantage

Provides a highly reliable core body temperature reading.

Rectal Temperature Route Contraindications

Contraindicated in patients with specific rectal conditions, cardiac disorders, or neutropenia.

Axillary Temperature Route Limitations

Requires a long placement time and lags behind core body temperature changes.

Tympanic Temperature Route Limitations

Accuracy is easily altered by cerumen buildup, improper operator technique, and ear disorders.

Temporal Temperature Route Limitations

Head coverings or diaphoresis can distort temperature readings.

Esophageal Temperature Route

An invasive monitoring route used exclusively in critical care settings for continuous core temperature assessment.

Pyrogen

Substances such as bacteria or viruses that trigger an immune response and reset the hypothalamic set point to a higher level.

Chill Phase of Fever

The initial phase of fever when the hypothalamic set point rises, causing shivering, cool pale skin, and cold complaints.

Plateau Phase of Fever

The phase when body temperature reaches the elevated hypothalamic set point, characterized by warm skin, thirst, and dehydration risk.

Defervescence Phase of Fever

The phase when the hypothalamic set point resets downward, leading to diaphoresis and decreased shivering.

Hyperthermia

An elevated body temperature resulting from the body's inability to promote heat loss or reduce heat production, while the hypothalamic set point remains unchanged.

Malignant Hyperthermia

An inherited, life-threatening metabolic disorder triggered by an unpredictable reaction to certain anesthetic agents.

Heatstroke

A severe heat emergency defined by a body temperature of $40\,^\circ\text{C}\ (104\,^\circ\text{F})$ or higher accompanied by altered mental status.

Heat Exhaustion

A condition caused by environmental heat exposure characterized by profuse diaphoresis leading to significant water and electrolyte depletion.

Mild Hypothermia Range

Core body temperature ranging between $32\text{--}35\,^\circ\text{C}\ (90\text{--}95\,^\circ\text{F})$.

Mild Hypothermia Presentation

Manifests as active shivering, memory loss, and poor judgment.

Moderate Hypothermia Range

Core body temperature ranging between $28\text{--}32\,^\circ\text{C}\ (82\text{--}90\,^\circ\text{F})$.

Moderate Hypothermia Presentation

Shivering stops, while heart rate and respiratory rate fall significantly.

Severe Hypothermia Range

Core body temperature dropping below $<28\,^\circ\text{C}\ (<82\,^\circ\text{F})$.

Severe Hypothermia Presentation

Manifests with cardiac dysrhythmias, loss of consciousness, and unresponsiveness to pain.

Frostbite

Ice crystal formation inside cells during exposure to freezing temperatures, causing tissue to appear white, waxy, and firm with localized loss of sensation.

Frostbite Care Precaution

Injured tissue must be warmed gradually and should never be rubbed or massaged.

Antipyretics

Medications administered to lower body temperature by lowering the elevated hypothalamic set point.

Pulse

The palpable bounding of blood flow in a peripheral artery.

Cardiac Output Formula

$$\text{Cardiac output} = \text{heart rate} \times \text{stroke volume}$$

Healthy Adult Cardiac Output Volume

A healthy adult heart pumps roughly $5,000\,\text{mL}$ of blood per minute.

Sinoatrial (SA) Node

The primary pacemaker of the heart located in the right atrium whose electrical impulses trigger myocardial contraction.

Radial Pulse Site

Located along the radial or thumb side of the inner wrist, used routinely for assessing peripheral pulse and hand circulation.

Apical Pulse Site

Auscultated over the cardiac apex, utilized for infants, irregular rhythms, and before administering cardiac medications.

Carotid Pulse Site

Located along the medial edge of the sternocleidomastoid muscle in the neck, accessed during shock or cardiac arrest when peripheral pulses are nonpalpable.

Brachial Pulse Site

Located in the groove between biceps and triceps at the antecubital fossa, used for blood pressure measurement and infant cardiac arrest.

Femoral Pulse Site

Located in the groin below the inguinal ligament, used for assessing shock or lower extremity circulation.

Temporal Pulse Site

Located over the temporal bone of the head, accessible in pediatric patients or when superior limbs are inaccessible.

Pulse Strength Grade 0

Indicates an absent, nonpalpable pulse.

Pulse Strength Grade 1+

Indicates a weak, diminished, or barely palpable pulse.

Pulse Strength Grade 2+

Indicates a normal and expected pulse volume.

Pulse Strength Grade 3+

Indicates a full, strong, or bounding pulse.

Pulse Equality

Assessment performed by palpating peripheral pulses bilaterally to verify symmetrical blood flow.

Tachycardia

An abnormally elevated heart rate in adults exceeding $100\,\text{beats/min}$.

Bradycardia

An abnormally slow heart rate in adults below $60\,\text{beats/min}$.

Dysrhythmia

An interrupted or irregular pulse rhythm resulting from altered electrical impulse conduction.

Pulse Deficit

A condition where the apical pulse rate exceeds the radial pulse rate, evaluated simultaneously by two clinicians.

Radial Pulse Palpation Technique

Place the tips of the first two or middle three fingers over the groove along the thumb side of the wrist; never use the thumb.

Conditioned Athlete Resting Pulse Effect

Physical conditioning lowers resting heart rate due to enhanced cardiac stroke volume and efficiency.

Digoxin and Beta Blockers Effect on Pulse

Pharmacological agents that decrease heart rate.

Epinephrine Effect on Pulse

A sympathomimetic agent that increases heart rate.

Hemorrhage Effect on Pulse

Triggers sympathetic stimulation to increase heart rate in response to acute blood loss.

Posture Effect on Pulse Rate

Standing or sitting increases heart rate, whereas lying down decreases heart rate.

Ventilation

The mechanical movement of gases into and out of the lungs.

Respiration Diffusion

The exchange of oxygen and carbon dioxide across the alveolar-capillary membrane.

Respiration Perfusion

The distribution of oxygenated red blood cells to systemic body tissues.

Inspiration Mechanics

An active respiratory process involving contraction of the diaphragm and expansion of the chest cavity.

Expiration Mechanics

A passive respiratory process driven by relaxation of the diaphragm and elastic recoil of the lungs.

Bradypnea

A regular respiratory rate of fewer than $12\,\text{breaths/min}$.

Tachypnea

A regular respiratory rate of more than $20\,\text{breaths/min}$.

Hyperpnea

Labored respiration characterized by an increase in both breathing depth and rate.

Apnea

The temporary cessation of breathing for several seconds.

Hyperventilation

An increase in respiratory rate and depth leading to excessive exhalation of carbon dioxide.

Hypoventilation

An abnormally depressed respiratory rate and depth leading to systemic carbon dioxide retention.

Cheyne-Stokes Respiration

A breathing pattern characterized by alternating periods of deep and shallow breathing followed by periods of apnea.

Kussmaul Respiration

Abnormally deep, regular breathing occurring at an increased rate.

Biot Respiration

Abnormally shallow breathing cycles interspersed with irregular periods of apnea.

Oxygen Saturation (SpO2)

The estimated percentage of hemoglobin bound with oxygen measured via pulse oximetry, normally $95\text{--}100\%$.

Significant Hypoxemia Threshold

An arterial oxygen saturation ($\text{SpO}_2$) reading below $90\%$.

Carboxyhemoglobin Effect on SpO2

Carbon monoxide binding falsely elevates pulse oximetry readings.

Blood Pressure

The lateral force exerted by circulating blood against the walls of systemic arteries.

Systolic Pressure

The peak maximum pressure exerted against arterial walls during ventricular contraction.

Diastolic Pressure

The minimal pressure exerted against arterial walls when the ventricles relax.