The positive prognostic implications of crying during exam on threshold ROP
Jon Blackledge1, Dustin M Lang, Robert W Arnold
1Pediatric Ophthalmology and Strabismus Ophthalmic Associates, 542 West Second Avenue, Anchorage, Alaska 99501-2242, USA.
Introduction:
Most infants cry with lid speculum, scleral depression and indirect ophthalmoscopy. This simple observation, "did the infant cry?" during the initial 31-week ROP screening exam was prospectively studied.
Methods:
From Fall 1989 through Summer 2003, all Alaskan infants with birthweight < or = 1500 grams were examined by RWA. After 1992, at the 31-week initial ROP screening, we recorded whether the infant was able to cry (cry), did not cry (quiet), or was intubated (vent) during indirect ophthalmoscopy with lid speculum and scleral depression.
Results:
ROP was classified as to threshold in 873 infants. Infants who were able to cry during their 31-week GA screening exam were less likely to progress to threshold (Chi square 600, 2 = 36, p < .001). Using a logistic fit of Threshold, the increased risk of ROP in infants unable to cry persisted independent of gestational age or birthweight.
Conclusions:
Respiratory and neurologic co-morbidity may render those infants unable to cry during the first screening examination at increased risk to progress to threshold ROP.
