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[Hypothermia in the elderly in the Negev]
1Dept. of Family Medicine, Ben-Gurion University of the Negev, Beer Sheba.
Harefuah
|December 15, 1994
Summary
Hypothermia in the elderly is a serious medical emergency. This study found infections, renal failure, and diabetes were common in older adults with hypothermia in Israel
Area of Science:
- Geriatrics
- Environmental Medicine
- Public Health
Background:
- Hypothermia in the elderly is a critical medical emergency with high mortality rates (32-80%).
- Commonly reported risk factors include advanced age, cold environments, and alcoholism.
- The Negev region of Israel experiences distinct temperature variations throughout the year.
Purpose of the Study:
- To investigate the incidence, predisposing factors, and demographic characteristics of elderly patients admitted with hypothermia in the Negev region.
- To assess the prevalence of associated medical conditions in this population.
- To determine if specific ethnic groups are at increased risk.
Main Methods:
- Retrospective review of medical records for all patients aged 65 and above admitted with hypothermia between 1984 and 1988.
- Data collected included patient demographics, admission season, and associated or predisposing conditions.
- Analysis of incidence rates based on the served population.
Main Results:
- A total of 44 admissions (39 patients) were identified over the 5-year period, with 34 occurring during winter.
- Key associated conditions were infections (54.5%), renal failure (29.5%), and diabetes mellitus (29.5%). Alcoholism was less frequent (13.6%).
- Patients of Asian or African origin represented a disproportionately higher percentage of admissions (73%) compared to their population representation (47%).
Conclusions:
- Hypothermia is a significant health concern among the elderly in the Negev desert region, not as rare as might be expected.
- Infections, renal failure, and diabetes are major contributing factors in elderly hypothermia cases in this area.
- Ethnic origin appears to be a risk factor for hypothermia in the elderly population of the Negev.
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Increased Body Temperature
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Methods of reducing fever
The signs and symptoms of fever include hot and dry skin, flushed face, thirst, muscle aches, anorexia, headache, tachycardia, tachypnea, and fatigue. Elevated body temperature is reduced using two methods: pharmacological and nonpharmacological. Proper identification and treatment of the root cause of a fever is of utmost importance.
Pharmacological Methods of Reducing Fever:
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Decreased Body Temperature
A decreased body temperature can occur in patients with hypothermia and frostbite. Heat loss with extended cold exposure overpowers the body's ability to create heat, resulting in hypothermia. Core temperature readings help classify hypothermia. Mild hypothermia is temperatures between 32 °C (89.6 °F) and 35°C (95 °F) and is caused by impaired thermoregulation. Moderate hypothermia is temperatures between 28 C (82.4 °F) and 32 °C (89.6 °F) caused by sustained extreme cold exposure, and severe...
Thermoregulation
The human body has a sophisticated thermoregulation system that employs negative feedback mechanisms to maintain an optimal core temperature. When the core temperature drops, peripheral and central thermoreceptors send signals to the hypothalamus, activating the heat-promoting center. This center triggers several responses aimed at increasing the core temperature. First, vasoconstriction reduces the flow of warm blood from internal organs to the skin so that the heat is not lost from the skin,...
Homeostatic Imbalances in Body Temperature
Hyperthermia occurs when the body's temperature becomes unusually high, often due to heat exposure, intense physical activity, or certain illnesses. This condition can create a dangerous cycle where elevated body temperature increases the metabolic rate, generating more heat and potentially leading to organ failure and brain damage. A severe form of hyperthermia, called heat stroke, can raise body temperature to life-threatening levels. Fever, on the other hand, is a controlled form of...

