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We read with interest the recent article on this subject(1) and have the
following comments to offer:
(i) As mentioned AHA-AAP guidelines were
used for resuscitation of newborn. It has not been spelt in how many
cases bag and mask/endotracheal intubation was used, because delivery
of oxygen is variable with either of two methods(2).
(ii) The percentage of measurement of oxygen
saturation by pulse oximetry was 6.3 at one minute in asphyxiated
babies. Going by definition of secondary out-come variable - the time
for the first recording available was 195 sec (median) with
inter-quartile range of 170-300 sec in asphyxiated neonates. Why full
range has not been mentioned? The babies falling below 25th percentile
and those above 75th percentile have been ignored. Similarly in
control babies, the median (inter-quartile range) has been mentioned
as 162.5 sec (90-180 sec).
(iii) In controls, babies with birth weight
>2499 g were included whereas in the study group, babies >999 g
were included. It has been mentioned in the results that two groups
were comparable in terms of gestation and birth weight.
(iv) In the definition of secondary outcome
variable, it is time taken to record first recording and the time
taken to reach 75% saturation, whereas in the primary outcome variable
time taken to reach 90% saturation has been mentioned. In primary
outcome variable time taken to record first reading has not been
mentioned.
Secondary outcome variable, i.e. time for
oxygen saturation to reach 75%, significance of it has not been
explained anywhere in the text. First recording has not been specified.
K.K. Locham,
Manpreet,
Geetanjali,
Department of Pediatrics,
Government of Medical College,
Rajindra Hospital, Patiala 147 001,
India.
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