fever Flashcards
fever is also called
pyrexia
what are some serious signs to watch for during fever?
confusion
hallucination
dehydration
____ is common under age 5
febrile seizures
older adults have ___ fever response
blunted
pathophysiology of fever
infectious agents/toxins/medication of inflammation (pyrogens) – stimulates mnocytes/macrophages/endothelial cells to release pyrogenic cytokines (IL 1, IL6, TNF, IFNs)–anterior hypothalamus– increase heat conservation and production –> fever
must refer to ER for patients
infants less than 3 months
patients with a fever of unknown origin
FUO adult definition
Body temperature greater than 38.3°C (101°F) for longer than 3 weeks duration that is undiagnosed after 3 days of hospital investigation, 3 outpatient visits, or 1 week of ambulatory investigation
FUO pediatric definition
A temperature of 38.0°C (101°F) or higher on several occasions, for more than 3 weeks duration, and with a failure to reach a diagnosis despite at least 8 days of investigation
diagnostic workup for FUO
CBC with differential
* Renal/liver function
* Electrolytes
* Urinalysis and urine culture
* Blood cultures x2 sets (peripheral) + any central lines
* Chest X-ray
* Lumbar puncture
* Other (depending on clinical assessment i.e. stool culture, sputum culture)
treatment for fever
IV fluids
* Antipyretics
* Analgesics
* Antiemetics
* Broad spectrum antibiotics (after cultures are taken if bacterial etiology suspected)
Systemic Inflammatory Response Syndrome (SIRS) Criteria (need 2 or more)
- Temp > 38.3°C or < 36°C
- HR> 90 bpm
- RR>20
- WBC > 12 000 (leukocytosis), WBC < 4000 (leukopenia) or a normal
WBC with > 10% immature forms
sepsis
Systemic infectious response (bacteremia) + 2 or more SIRS criteria
severe sepsis
Sepsis complicated by any signs of organ dysfunction or hypoperfusion
septic shock
Severe sepsis complicated by persistent hypotension refractory to early fluid therapy,
Persistent SBP < 90 mmHg
pathophysiology of sepsis
infectious or non-infectious–> pro inflammatory response and cascade of inflammatory mediators
cytokines activate coagulation cascade
hypovolemia
cardiovascular depression
systemic inflammation