1 step approach-WHO & IAD PSG


1 step approach-WHO & IAD PSG


→ It is done only in females with any risk factor @ 24-28 weeks of pregnancy.

→ It is used both for screening and diagnostic purpose.

→ Patient is advised unrestricted diet for 72 hours followed by overnight fasting and then 75 gm of glucose is given.

→ Total 3 samples are taken:

→ 1st sample – fasting sample

→ 2nd sample = After 1 hour of 75 gm of glucose

→ 3rd sample = After 2 hours of 75 gm glucose

→ Reference Readings of one step approach

Time 75 g OGTT
Fasting 90 mg/dl
1 hour 180 mg/dl
2 hours 153 mg/dl

→ Out of these 3 values if any I value is abnormal; patient is considered as having gestational diabetes\

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