Name: hypothermia and frostbite signs
Uploaded: 2024-06-20T13:02:51.000Z
Duration: 1 min 29 s
Channel: JoVE

Conditions that decrease body temperature include hypothermia and frostbite.
Hypothermia occurs when the body temperature drops due to prolonged exposure to a cold environment, surpassing its ability to produce heat.
It can be caused accidentally due to exposure to a cold environment or can be induced deliberately for surgical or emergency treatment in an attempt to reduce metabolism.
Other causes include toxin exposures, metabolic imbalances, and infections.
Symptoms of hypothermia include shivering, memory loss, cyanosis, impaired judgment, bradycardia, bradypnea, and hypotension.
Severe hypothermia can cause cardiac dysrhythmias, unconsciousness, and insensitivity to pain.
Frostbite is a condition caused by prolonged exposure to extreme cold. This condition causes damage to the affected tissues.
It primarily affects the earlobes, nose, fingers, and toes.
In frostbite,&#160; ice crystals accumulate in cells, causing irreversible tissue damage. The affected region becomes white, waxy, stiff, and numb.
The symptoms include numbness, severe pain, and blisters. Extreme cases can lead to gangrene.
Hypothermia and frostbite can cause serious health risks if not treated promptly.

decreased body temperature

Decreased Body Temperature

A decreased body temperature can occur in patients with hypothermia and frostbite. Heat loss with extended cold exposure overpowers the body&#39;s ability to create heat, resulting in hypothermia. Core temperature readings help classify hypothermia. Mild hypothermia is temperatures between 32 &#176;C (89.6 &#176;F) and 35&#176;C (95 &#176;F) and is caused by impaired thermoregulation. Moderate hypothermia is temperatures between 28 C (82.4 &#176;F) and 32 &#176;C (89.6 &#176;F) caused by sustained extreme cold exposure, and severe hypothermia is temperatures below 28&#176;C (82.4 &#176;F) caused by prolonged exposure to extreme cold.
Hypothermia can be accidental, such as drowning in cold water, or intentionally caused during surgical or emergency treatments to reduce metabolism and the body&#39;s requirement for oxygen. Although hypothermia is most frequent in individuals exposed to low temperatures, it can also occur as a result of toxin exposure, metabolic imbalances, infections, and central nervous and endocrine system dysfunction. Accidental hypothermia is more common in older adults and goes unnoticed.
The symptoms of hypothermia include shivering, memory loss, depression, and impaired judgment. It can also cause a slowed heart rate, shallow breathing, weak pulse, and low blood pressure. The skin begins to get cyanotic. If hypothermia worsens, patients endure cardiac dysrhythmias and loss of consciousness and become insensitive to painful stimuli. In severe situations, a person exhibits clinical indications akin to death.
Frostbite develops when the body is exposed to temperatures below normal. Inside the cells, ice crystals accumulate, causing irreversible circulation and tissue damage. Earlobes, the tip of the nose, toes, and fingers, are particularly vulnerable to frostbite. The affected region turns white, waxy, and stiff to the touch, along with numbness. Interventions include slow warming, analgesia, and injured tissue protection.
Critical nursing interventions to prevent a further drop in body temperature include removing damp clothing, replacing it with dry garments, and ensuring patients are snugly covered with blankets. In an emergency outside of a hospital, have the patient rest under blankets adjacent to a warm person. A conscious patient benefits from consuming hot liquids like soup and avoiding alcohol and caffeinated beverages. It is also beneficial to cover the patient&#39;s head, bring the patient near the fire or in a warm room, or place heating pads close to regions of the body that lose heat the fastest, for example, the head and neck.

A decreased body temperature can occur in patients with hypothermia and frostbite. Heat loss with extended cold exposure overpowers the body&#39;s ability ...

Education

JoVE Core

Nursing

Unit 1

Vital Signs: Temperature

KEY TERMS AND CONCEPTS

hypothermia and frostbite signs

Hypothermia and frostbite are two cold-related conditions that can cause a decreased body temperature. They happen when heat loss from long exposure to cold becomes greater than the body’s ability to make heat. Core temperature readings help classify hypothermia and show how severe it is.

Mild hypothermia occurs when core temperature falls between 32 °C (89.6 °F) and 35 °C (95 °F). It is linked to impaired thermoregulation, which means the body has trouble controlling its temperature. Moderate hypothermia occurs between 28 °C (82.4 °F) and 32 °C (89.6 °F). Severe hypothermia is below 28 °C (82.4 °F), usually after prolonged exposure to extreme cold.

Hypothermia can happen by accident, such as drowning in cold water. It can also be caused on purpose during surgery or emergency care to lower metabolism and reduce the body’s need for oxygen. Other causes include toxin exposure, metabolic imbalances, infections, and problems in the central nervous or endocrine systems. Accidental hypothermia is more common in older adults and may go unnoticed.

Common signs of hypothermia include shivering, memory loss, depression, and poor judgment. It can also slow the heart rate, make breathing shallow, weaken the pulse, and lower blood pressure. The skin may become cyanotic, which means it has a bluish color from low oxygen. If hypothermia worsens, cardiac dysrhythmias, loss of consciousness, and lack of response to pain can occur. In severe cases, the person may look clinically dead.

Frostbite develops when the body is exposed to temperatures below normal and tissue freezes. Ice crystals build up inside cells and can cause permanent circulation and tissue damage. The earlobes, tip of the nose, toes, and fingers are especially at risk. The area may turn white, waxy, stiff, and numb.

Care for hypothermia and frostbite includes slow warming, pain relief, and protection of injured tissue. To prevent body temperature from dropping further, remove damp clothing, replace it with dry clothes, and cover the person with blankets. In an emergency outside the hospital, the patient can rest under blankets next to a warm person. A conscious patient may drink hot liquids like soup and should avoid alcohol and caffeinated drinks. It also helps to cover the head, move the person near a fire or into a warm room, or place heating pads near heat-losing areas such as the head and neck.

Hypothermia and Frostbite Signs

introduction to vital signs

How Nurses Check Vital Signs

Vital signs are basic body measurements that show how well essential functions are working. They include body temperature, pulse rate, respiratory rate, and blood pressure. These are often shortened to T, P, R, and BP. In some healthcare settings, oxygen saturation, or SpO2, is also included. Pain and level of consciousness may count as vital signs in certain situations. These measurements help healthcare professionals assess a person's well-being and spot changes in major body systems. They...

guidelines for measuring vital signs

Measuring Vital Signs for Accurate Nursing Care

Measuring vital signs accurately helps nurses track patient changes and respond with timely care. Careful technique also improves the reliability of the results. Before measuring, a nurse checks whether the patient is calm and comfortable. Anxiety or discomfort can affect the reading. The right equipment also matters. Blood pressure readings depend on using the correct cuff size, since a cuff that is too large or too small may give an inaccurate result. Nurses also inspect equipment for wear,...

body temperature

How the Body Regulates Temperature

The body regulates temperature by balancing heat production and heat loss. This balance helps keep core body temperature steady even during exercise or changes in the environment. Core temperature refers to the temperature of deep tissues under the skin, while surface temperature can change more easily. Heat is produced mainly by metabolic activity in the body’s core tissues. Blood carries this heat from the core to the skin, where it can be released into the environment. Core body temperature...

mechanism of heat transfer

How the Body Loses and Gains Heat

The body loses and gains heat through conduction, convection, evaporation, and radiation. These heat transfer mechanisms help the body stay in balance, or maintain homeostasis, when the environment is not thermoneutral. In a thermoneutral environment, the body is already in balance and does not need to use or release energy to keep its core temperature steady. Conduction is heat transfer through direct contact. It happens when skin touches an object with a different temperature. For example,...

factors affecting body temperature

Body Temperature Changes and Why They Happen

Body temperature changes for many reasons, and age is one of the most important. Newborns have an immature system that must respond quickly to environmental change, so their temperature can shift more easily. Older adults can also have trouble regulating temperature because of age-related changes and other factors. Exercise can raise body temperature because active muscles need more blood flow. The body also breaks down glucose and fat for energy, and that process produces heat. Hormone levels...

increased body temperature

Fever Phases and Body Temperature Control

Fever is a rise in body temperature above 38°C (100.4°F). A person with fever is called febrile. The hypothalamus, a part of the brain that works like the body’s thermostat, controls temperature by using a thermoregulatory setpoint. It reads signals from cold and warm receptors throughout the body and adjusts temperature as needed. Fever usually starts when the hypothalamic setpoint changes in response to infection or illness. A virus such as influenza, a bacterium such as streptococcus, or...

types of fever

Fever Types and Heat-Related Conditions

Fever can happen for many reasons, and not all fevers come from infection. It may be linked to nervous system disorders, certain cancers, blood diseases such as leukemia, embolism, thrombosis, heatstroke, dehydration, surgical trauma, crushing injuries, or allergic reactions. Rigor is one fever pattern marked by a sudden, severe shivering attack. During rigor, body temperature rises quickly to hyperpyrexia levels, which means an extremely high fever. Hyperthermia is different from a typical...

patterns of fever

Fever Phases and Temperature Patterns

Fever has clear phases and several temperature patterns. The first phase is the onset or invasion phase, when body temperature begins to rise. This rise may happen suddenly or gradually. The second phase is the steady phase. During this stage, body temperature reaches its highest point and stays constant at a high level. The third phase is the defervescence or decline phase. In this stage, the elevated temperature returns to normal, either suddenly or gradually. Fever may appear as...

methods of reducing fever

Fever Care: Medicines and Cooling Steps

Fever care focuses on lowering body temperature and finding the cause of the fever. Common signs and symptoms include hot, dry skin, a flushed face, thirst, muscle aches, anorexia, headache, tachycardia, tachypnea, and fatigue. Proper treatment starts with identifying the root problem. Pharmacological methods use medicine to reduce fever. If a bacterial infection is the cause, healthcare providers collect culture specimens such as urine, blood, sputum, and wound samples, then prescribe the...

Hypothermia and frostbite are two cold-related conditions that can cause a decreased body temperature. They happen when heat loss from long exposure to cold becomes greater than the body’s ability to make heat. Core temperature readings help classify hypothermia and show how severe it is. Mild hypothermia occurs when core temperature falls between 32 °C (89.6 °F) and 35 °C (95 °F). It is linked to impaired thermoregulation, which means the body has trouble controlling its temperature. Moderate...

equipments used to measure body temperature

equipments-used-to-measure-body-temperature

Body Temperature Tools and Thermometer Types

Body temperature can be checked with several tools, and the result may be shown in Celsius or Fahrenheit. Different thermometers are used for different body sites and settings. Some give a reading in seconds, while others are older or single-use designs. Glass-bulb thermometers are hollow glass tubes with a bulb tip that holds a liquid such as ethanol or mercury. Mercury glass-bulb thermometers were once the standard for measuring body temperature. Today, many countries prohibit mercury...

temperature measurement sites

Body Temperature: Common Measurement Methods

Body temperature can be measured at several common sites, and each site has its own uses and limits. A thermometer is used to check temperature in the oral cavity, axillary region, temporal artery, and skin surface such as the forehead, abdomen, and axilla. Some sites give a closer estimate of true core temperature, which is the temperature inside the body. Core body temperature can be assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder. The oral site is...

assessing body temperature - tympanic membrane

assessing-body-temperature-tympanic-membrane

Using a Tympanic Thermometer Correctly

A tympanic membrane thermometer measures temperature through the ear. Correct use of the device helps support an accurate reading and reduces the chance of cross-contamination. Start with good hand hygiene before handling the thermometer. Turn it on and wait for the ready sign on the screen. Then place the probe cover in position before use. Ask the patient to tilt the head to the side for comfort. Check the ear canal for cerumen, or earwax, because it can block the probe lens cover. If...

assessing body temperature - oral

Oral Temperature Check with an Electronic Thermometer

Oral temperature checks use an electronic thermometer to measure body temperature through the mouth. Proper hand hygiene comes first to help prevent the spread of microorganisms. The thermometer is then removed from the charging unit, turned on, and used only after the ready sign appears. A probe cover is slid on until a click is heard. This helps prevent cross-contamination and keeps the cover in the correct place. The patient is asked to open the mouth, and the probe is placed under the...

assessing body temperature - rectal

Rectal Temperature Checks for Core Readings

Rectal temperature checks are a precise way to measure core body temperature. This method often gives a higher reading than oral temperature. It is used when an accurate internal temperature is needed. The procedure starts with hand hygiene and clean gloves to reduce cross-infection. The patient is placed in a side-lying position so the rectal area can be seen more easily. Only the anal region is exposed, and warmth and privacy are maintained. If feces or secretions are present, the area is...

assessing body temperature - axilla

Axillary Temperature Check with Digital Thermometer

Axillary body temperature is checked with a digital thermometer using a careful, step-by-step method. The goal is to get an accurate reading from the axilla, or underarm area, while keeping the patient comfortable and protected. Hand hygiene comes first, followed by clean gloves to help prevent infection and cross-contamination. The patient is then told what will happen so they can cooperate with the procedure. Privacy is maintained, only the axilla is exposed, and the patient is asked to stay...

assessing body temperature - temporal artery

assessing-body-temperature-temporal-artery

Temporal Artery Temperature Scan Steps

Temporal artery temperature scanning is a quick way to check a patient’s body temperature with a temporal artery thermometer. The process begins with hand hygiene and a fresh pair of gloves to help prevent cross-infection and keep the patient safe. The procedure should also be explained clearly so the patient knows what to expect and can cooperate with comfort. Before scanning, the forehead should be checked for moisture. If the skin is wet, it should be gently wiped with a clean cloth because...

key terms and concepts

Learn how hypothermia and frostbite lower body temperature, how core temperature levels classify severity, and what signs and first aid steps help.

Hypothermia and Frostbite Signs | JoVE K12

JoVE Core Nursing offers concise animated lessons on nursing practices, covering health systems, nursing organizations, and health concepts. It includes practical communication, infection prevention, and nursing fundamentals, providing students with a clear understanding of nursing principles.

nursing

Hypothermia and Frostbite Signs

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