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Data Element (edit)
Field Name: Ap_pH
CCMDB Label: ph
CCMDB tab: Apache
Table: L_Log table
Data type: number
Length: single
Program: CC
Created/Raw: Raw
Start Date: 1988-07-11
End Date: 2300-01-01
Sort Index: 70

The acidity or basicity of the patient's arterial blood.

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Legacy implementation right in the table

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It is an element of the Arterial blood gas (APACHE).

Arterial blood gas (APACHE) instructions

There are special collection instructions for Arterial blood gas (APACHE), refer there for further info.

Apache Physiological Variable
variable name ph
absolute max allowed 7.99
warning max 7.97
high score 4 >=7.7
high score 3 >=7.6 and <7.7
high score 2
high score 1 >=7.5 and <7.6
score 0 >=7.33 and <7.5
low score 1
low score 2 >=7.25 and <7.33
low score 3 >=7.15 and <7.25
low score 4 <7.15
AP phys warnMin 6
AP phys absMin 6


This value is used to generate the APACHE Score.

Collecting Apache physiological variables

There are some specific rules to follow in choosing which one of several lab results to collect.

See APACHE physiological variable collection for details.

Cross Chcks

Rules described in APACHE_physiological_variable_collection#Exceptionally_high_or_low_values are implemented by Check APACHE physiological variable high low.


There have been different collection practices used when selecting the PH value, the original APACHE II user manual (version 1.0) is as above and that is how it should be collected.

Data Integrity Checks

Data Integrity Checks (automatic list)

Check APACHE physiological variable high lowCCMDB.accdbimplemented

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