# Logical Record Architecture for Health and Social Care
## Discharge Summary Release 0.02

Contents
The content of this release is not comprehensive and is not fully validated and must not be used in live system implementations.
# ELEMENT Domain Model: NormalisedProteinCatabolicRateObservation
An ELEMENT to represent the result of a derived normalised protein catabolic rate observation. Normalised protein catabolic rate (PCRn) can be calculated from pre-dialysis and post-dialysis BUN measurements in patients receiving intermittent dialysis. This measure of net protein catabolism, adjusted for body size, is a useful clinical measure of nutrition that correlates with patient outcome and, in patients who are in nitrogen balance, is a reasonable estimate of dietary protein intake. Example formula: PCRn = C0/(a + bKt/V + c/(Kt/NLL)) + 0.168 (where Co is the pre-dialysis BUN in mg/dL) The value is expressed in grams per kilogram per day (g/kg.d) so that the results can be compared and studied for patients with differing weights. ## Attributes
Name | Data type | Occurs | Description | Value Constraints
--- | --- | --- | --- | ---
name | SC | 1..1 | The name, expressed as a coded value or as plain text, specifies the clinical or administrative concept to which this EHR node corresponds, as labelled in the EHR system in which it was first committed. |
value
Literal value(s): PROPERTY_OBSERVATION_ELEMENT
rc_id | II | 1..1 | The globally-unique identifier by which this node in the EHR hierarchy is referenced in the EHR system to which the data were first committed. This identifier shall be retained by the EHR Recipient and re-used whenever this RECORD_COMPONENT is subsequently included in another EHR_EXTRACT. |
meaning | CD.CV.SCT | 1..1 | A coded representation of the result of a derived normalised protein catabolic rate observation. |
code
Semantic expression constraint
synthesised | BL | 1..1 | This attribute value shall be TRUE if this RECORD_COMPONENT has been created in order to comply with this standard , but this point in the EHR hierarchy has no corresponding node in the EHR from which it was extracted. |
value
Default value: false
obs_time | IVL_TS | 0..1 | The date and time, or interval, of the derived normalised protein catabolic rate observation. |
value | PQ | 1..1 | The value of the derived normalised protein catabolic rate observation expressed in grams per kilogram per day (g/kg.d). |
unit
Literal value(s): g/kg.d
## Item of ENTRY Domain Models ### NormalisedProteinCatabolicRate ## Reference Model Type ## PROPERTY_OBSERVATION_ELEMENT