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EspañolCALORIC REFLEX TEST
(Redirected from Caloric reflex testing)
In medicine, the 'caloric reflex test' is a test of the vestibulo-ocular reflex. It is used by audiologists and other trained professionals to validate a diagnosis of asymmetric function in the peripheral vestibular system. Calorics are usually a subtest of the electronystagmography (ENG) test battery.
It involves irrigating cold or warm water or air into the external auditory canal.
★ If the water is cold (30oC) the eyes turn toward the ipsilateral ear, with horizontal nystagmus (quick horizontal eye movements) to the contralateral ear.[1]Narenthiran G. Neurosurgery Quiz. Annals of Neurosurgery. URL: http://www.annals-neurosurgery.org/quiz/nsq2/#a3. Accessed on: August 17, 2006.
★ If the water is warm (44oC) the eyes turn toward the contralateral ear, with horizontal nystagmus to the ipsilateral ear.
★ Absent reactive eye movement suggests vestibular weakness of the horizontal semicircular canal of the side being stimulated.
Mnemonics are common in the medical literature. One mnemonic used to remember the direction of nystamgus is ''COWS''.[2]
'COWS': 'C'old water = nystagmus to the 'O'pposite side, 'W'arm water = nystagmus to the 'S'ame side.
★ Terms for anatomical location
★ Vestibulo-ocular reflex
1. Bardorf CM, Van Stavern GP. Nystagmus, Acquired. eMedicine.com. URL: http://www.emedicine.com/oph/topic339.htm. Accessed on: August 17, 2006.
2. COWS caloric test., Webb C, , , Ann Emerg Med, 1985
★
In medicine, the 'caloric reflex test' is a test of the vestibulo-ocular reflex. It is used by audiologists and other trained professionals to validate a diagnosis of asymmetric function in the peripheral vestibular system. Calorics are usually a subtest of the electronystagmography (ENG) test battery.
| Contents |
| Technique and results |
| Mnemonic |
| See also |
| References |
| External links |
Technique and results
It involves irrigating cold or warm water or air into the external auditory canal.
★ If the water is cold (30oC) the eyes turn toward the ipsilateral ear, with horizontal nystagmus (quick horizontal eye movements) to the contralateral ear.[1]Narenthiran G. Neurosurgery Quiz. Annals of Neurosurgery. URL: http://www.annals-neurosurgery.org/quiz/nsq2/#a3. Accessed on: August 17, 2006.
★ If the water is warm (44oC) the eyes turn toward the contralateral ear, with horizontal nystagmus to the ipsilateral ear.
★ Absent reactive eye movement suggests vestibular weakness of the horizontal semicircular canal of the side being stimulated.
Mnemonic
Mnemonics are common in the medical literature. One mnemonic used to remember the direction of nystamgus is ''COWS''.[2]
'COWS': 'C'old water = nystagmus to the 'O'pposite side, 'W'arm water = nystagmus to the 'S'ame side.
See also
★ Terms for anatomical location
★ Vestibulo-ocular reflex
References
1. Bardorf CM, Van Stavern GP. Nystagmus, Acquired. eMedicine.com. URL: http://www.emedicine.com/oph/topic339.htm. Accessed on: August 17, 2006.
2. COWS caloric test., Webb C, , , Ann Emerg Med, 1985
External links
★
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