11.9
Métodos para Reduzir a Febre
Os sinais e sintomas da febre incluem pele quente e seca, rosto ruborizado, sede, mialgia, anorexia, cefaleia, taquicardia, taquipneia e fadiga. A tem…
A seleção de um tratamento apropriado para reduzir a febre depende primeiro da determinação da causa.
Medicamentos como antipiréticos induzem perda de calor, enquanto corticosteróides interferem na resposta hipotalâmica e redefinem o ponto de ajuste elevado.
Se a febre for causada por uma infecção bacteriana, antibióticos são prescritos para ajudar a combater os pirogênios causadores da febre.
Por outro lado, se a febre for causada por infecção viral, ela pode ser controlada de forma não farmacológica, pois os vírus têm uma vida útil curta.
Se uma pessoa tiver alergia a medicamentos ou reação de hipersensibilidade, ela pode apresentar febre e erupção cutânea ou prurido. As intervenções incluem a interrupção da medicação, o tratamento da integridade da pele prejudicada e a educação sobre alérgenos.
A insolação requer tratamentos de emergência, como administração de fluidos intravenosos e irrigação do estômago e do intestino grosso com soluções frias, conforme prescrito.
Os métodos não farmacológicos de redução da febre incluem esponja morna, aplicação de compressas de gelo nas áreas das axilas e virilhas, ventiladores oscilantes e cobertores de hipotermia.
Embora essas técnicas incentivem mais perda de calor, os enfermeiros devem garantir que não causem tremores.
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Q1: How do antipyretics reduce fever?
Antipyretics such as acetaminophen and ibuprofen induce heat loss by lowering body temperature. These nonsteroidal anti-inflammatory drugs work by affecting the body's temperature regulation system. Antipyretics are commonly used to manage fever caused by viral infections or when other pharmacological methods are not appropriate for the patient.
Q2: Why is identifying the cause of fever important before treatment?
Determining the fever's cause guides appropriate treatment selection. Bacterial infections require antibiotics to destroy pyrogenic bacteria, while viral fevers can be managed non-pharmacologically since viruses have short lifespans. Drug hypersensitivity reactions need medication discontinuation and skin care. Proper diagnosis ensures effective intervention and prevents unnecessary or harmful treatments.
Q3: What nonpharmacological methods reduce fever through heat loss?
Nonpharmacological fever reduction uses evaporation, conduction, convection, and radiation. Methods include tepid sponge baths, applying ice packs to axillae and groin areas, oscillating fans, and hypothermia blankets with refrigerated solutions. These techniques encourage heat loss but must avoid inducing shivering, which would promote additional heat production instead of reduction.
Q4: How do corticosteroids differ from antipyretics in treating fever?
Corticosteroids work by interfering with the hypothalamic response and resetting the raised set-point of body temperature. Unlike antipyretics that induce heat loss, corticosteroids modify the central temperature regulation mechanism itself. This different mechanism makes them useful in specific fever cases where the hypothalamic set-point needs adjustment rather than simple heat dissipation.
Q5: What emergency treatments are used for heatstroke?
Heatstroke requires immediate medical intervention including relocating the patient to a cooler area, removing excess clothing, and applying cold damp cloths. Emergency treatments involve administering intravenous fluids, irrigating the stomach and lower bowel with cold solutions, and using oscillating fans to enhance convective heat loss. Hypothermia blankets may also be applied to rapidly reduce dangerous body temperature.
Q6: How should nurses manage fever caused by drug hypersensitivity reactions?
Drug hypersensitivity fever presents with rash or pruritus symptoms. Treatment involves immediately discontinuing the offending medication, treating any impaired skin integrity from the allergic reaction, and providing allergen education to the patient and family. Antipyretics may be used to manage fever symptoms while the underlying allergic response resolves after medication withdrawal.
Q7: Why must nurses prevent shivering during nonpharmacological fever reduction?
Shivering generates additional body heat through muscle contractions, which counteracts fever reduction efforts. While tepid sponging, ice packs, and fans encourage heat loss through evaporation and convection, shivering would promote heat production instead. Nurses must monitor patients carefully during nonpharmacological interventions to ensure comfort and prevent involuntary muscle contractions that undermine cooling effectiveness.