Term
| The most common temperature disorder in the OR is? |
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Definition
|
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Term
| Exception to this standard of care (temperature monitoring in the OR)is? |
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Definition
| Procedure lasting less than 15 min |
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Term
| Definition of hypothermia? |
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Definition
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Term
| Patients undergoing general anesthesia will experience core temperature loss of up to ____ degrees C in the first 3 hours. |
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Definition
|
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Term
| The most pronounced temperature fall occurs within what time frame? |
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Definition
| the first hour (1.6 deg C) |
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Term
| How are temperature and metabolism rate related? |
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Definition
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Term
| The Metabolic rate decreases by what % with every degree C reduction? |
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Definition
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Term
| Patient populations MOST at risk for hypothermia include? (4) |
|
Definition
infants
elderly
hypothyroid
hypothalmic lesions |
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Term
| At what phase of anesthesia does the temperature reach a steady state? |
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Definition
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Term
| Describe the mechanisms by which regional anesthesia can produce hypothermia |
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Definition
| sympathetic blockade and vasodilation |
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Term
| Describe the mechanism by which general anesthesia can produce hypothermia |
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Definition
| loss of temperature regulation mechanisms, loss of shunting of blood to central organs by vasodilating- increasing blood in the periphery, reduced metabolic rate, loss of muscle tone/movement (inc w/NDMR) |
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Term
| What type of heat loss accounts for 60% of total heat loss? |
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Definition
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Term
| Radiation heat loss depends on what? |
|
Definition
| cutaneous blood flow and exposure of body surfaces to the environment |
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Term
| The BEST way to prevent radiation heat loss is? |
|
Definition
| increasing the room temperature |
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|
Term
| Reducing heat loss by convection can be achieved by? |
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Definition
| covering up the patient or creating a barrier |
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Term
| A patient who is having irrigation of abdominal cavity would be at risk for what type of heat loss? |
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Definition
|
|
Term
| Name the major mechanism of heat production in infants younger than 3 months? |
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Definition
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|
Term
| True or False; infants up to the age of 3 months do NOT shiver to generate heat |
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Definition
|
|
Term
| Name 4 sites that represent CORE temperature monitoring? |
|
Definition
Tympanic
Nasopharyngeal
Pulmonary artery
Esophageal |
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|
Term
| How does hypothermia progression affect nodal tissue refractory? |
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Definition
|
|
Term
| Progression of events with temperatures at 33C |
|
Definition
1. Bradycardia**
2. myocardial depression
3. VF
4. Shivering STOPS |
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Term
| At what temperature does coma & platelet dysfunction (aka relative thrombocytopenia occur) |
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Definition
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|
Term
| How does hypothermia affect metabolism? |
|
Definition
decreases metabolic rate
decreased tissue perfusion (acidosis)
hyperglycemia |
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|
Term
| Hypothermia shifts the oxyhemoglobin dissociation curve to the? |
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Definition
|
|
Term
| True or False; hypothermic patient will require higher MAC doses to keep them asleep? |
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Definition
| False: reduced b/c of dereased blood flow through lungs (and tissues) |
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Term
| What 2 mechanisms exist in a hypothermic patient will prolong or delay emergence? |
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Definition
| Reduced blood flow through the lungs, and reduced metabolic rate (C02 production) decreases the stimulus to breath |
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Term
| Hypothermic patients who are shivering are at risk for? |
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Definition
| MI b/c oxygen consumption increases up to 500% |
|
|
Term
| Name the drug used to stop shivering? |
|
Definition
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|
Term
| At what ROOM temperature will ALL anesthetized pts become hypothermic? |
|
Definition
|
|
Term
| Name a complication of overhumidification & rainout? especially in infants |
|
Definition
| Aspiration of pooled condensation in circuit |
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|
Term
| Name 4 ways to treat Severe hypotethermia |
|
Definition
1. warm gastric lavage
2. warm peritoneal lavage
3. warm bladder lavage
4. cardiopulmonary bypass |
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