00938

Point Versus Interval

2003-08-22
Definition: This optional attribute allows master files to classify observations as measuring the patient_s state at a point in time (e.g., spot urines, random urines, serum potassium), or averaged over a interval of time (e.g., concentration, total amount, or clearance over a 24-hour collection). Interval measures most often apply to urine and stool specimens (e.g., 24-hour urines, 3-day stool fats). They also apply to clinical measurements such as urine outputs, which are reported as shift totals and 24-hour totals, and event counts on physiologic monitors such as the number of PVCs on a 24-hour Holter monitor.

This field would only be valued in a transaction if the service sending this master file message classified its observation by point versus time interval. This field is not used to record the time collection interval for a particular sample. It is used to specify a characteristic of an observation which has a defined normal range and to distinguish observations of the same kind but observed over varying periods of time. A spot urine sodium would have PT stored in this field. A 24-hour urine sodium and a 24-hour Holter monitor would have 24H stored here. This attribute would only be valued if the filling service classified its observations by timing. Refer to User-defined Table 0255 - Duration categories for suggested values.

Length≤250
26 values
*(asterisk) Life of the "unit." Used for blood products.
1H1 hour
1L1 months (30 days)
1W1 week
2.5H2 1/2 hours
2D2 days
2H2 hours
2L2 months
2W2 weeks
3D3 days
3H3 hours
3L3 months
3W3 weeks
4D4 days
4H4 hours
4W4 weeks
5D5 days
5H5 hours
6D6 days
6H6 hours
7H7 hours
8H8 hours
12H12 hours
24H24 hours
30M30 minutes
PTTo identify measures at a point in time. This is a synonym for "spot" or "random" as applied to urine measurements.
6 components
1O-Identifier
2O-Text
3OName of Coding System
4O-Alternate Identifier
5O-Alternate Text
6OName of Alternate Coding System