ABG Tic Tac Toe.doc

ABG Tic-Tac-Toe Tic-Tac-Toe Values: pH (acid): < 7.35 pH (normal): 7.35 – 7.45 > 7.45 pH (base):

PaCO2 (acid): PaCO2 (normal): PaCO2 (base):

> 45 35 – 45 < 35

ABG ABG valu values es:: pH pH        PaCO PaCO2 2          Acid Acid!" !"or orma mal! l!Ba Base se:: pH pH      PaCO PaCO2 2         

HCO3 (acid): HCO3 (normal): HCO3 (base):

< 22 22 – 26 > 26

HCO3 HCO3              HCO3 HCO3             

"o# plu$ in %our values:

Acid

"ormal

Base (Al&aline)

pH PaCO2 HCO3

'P*'ATO'+ AC*,O*: 'espiraor% acidosis uncompensaed: 'espiraor% acidosis pariall% compensaed: 'espiraor% acidosis oall% compensaed:

 pH acid (↓)  pH acid (↓)  pH normal

PaCO2 acid (↑) PaCO2 acid (↑) PaCO2 acid (↑)

HCO3 normal HCO3 base (↑) HCO3 base (↑)

'P*'ATO'+ A./A.O*: 'espiraor% al&alosis uncompensaed: 'espiraor% al&alosis pariall% compensaed: 'espiraor% al&alosis oall% compensaed:

 pH base (↑)  pH base (↑)  pH normal

PaCO2 base (↓) PaCO2 base (↓) PaCO2 base (↓)

HCO3 normal HCO3 acid (↓) HCO3 acid (↓)

0TABO.*C 0TABO.*C AC*,O*: 0eabolic acidosis uncompensaed: 0eabolic acidosis pariall% compensaed: 0eabolic acidosis oall% compensaed:

 pH acid (↓)  pH acid (↓)  pH normal

PaCO2 normal PaCO2 base (↓) PaCO2 base (↓)

HCO3 acid (↓) HCO3 acid (↓) HCO3 acid (↓)

0TABO.*C 0TABO.*C A./A.O*: 0eabolic al&alosis uncompensaed: 0eabolic al&alosis pariall% compensaed: 0eabolic al&alosis oall% compensaed:

 pH base (↑)  pH base (↑)  pH normal

PaCO2 normal PaCO2 acid (↑) PaCO2 acid (↑)

HCO3 base (↑) HCO3 base (↑) HCO3 base (↑)

*nerpreaion: Uncompensaed! Uncompensaed! pH and one o"er #al$e (ei"er PaCO2 or HCO3) are abnormal. %bnormal %bnormal pH deermines &"e"er acidosis or al'alosis. %bnormal %bnormal PaCO2 or HCO3 deermines &"e"er respiraor or meabolic. PaCO2 abnormal  respiraor* HCO3 abnormal  meabolic. Parial compensaion! all #al$es are abnormal. +&o #al$es ,a-ree (pH and ei"er PaCO2 or HCO3 are /O+H acid or /O+H base)0 and "e remainin- #al$e (ei"er PaCO2 or HCO3) is "e OPPO1+ o "e pH. +"e #al$e (PaCO2 or HCO3) "a ,a-rees &i" "e pH is correc (deermines &"e"er respiraor or meabolic). Compensaion! pH is normal0 bo" PaCO2 and HCO3 are abnormal. One &ill be acidoic0 "e o"er base. +"e #al$e "a mos closel mac"es "e pH ideniies "e r$e ($nderlin-) sae.  "e $ll compensaed pH is be&een 7.357.40 "en "e normal pH is closer o

"e acid end and "e acidoic #al$e (ei"er PaCO2 or HCO3) is correc.  "e pH is be&een 7.47.450 "en "e normal pH is closer o "e al'aloic end and "e base #al$e (ei"er PaCO2 or HCO3) is correc.

Acid-Base *nerpreaion

Table Values Acid

'espiraor% acidosis uncompensaed pH

↓

PaCO2

↑

HCO3 Acid

'espiraor% acidosis pariall% compensaed pH

↓

PaCO2

↑

"ormal

Base

 "ormal

Base

"ormal

↑ Base

HCO3 Acid

'espiraor% acidosis oall% compensaed pH PaCO2

 ↑

HCO3 Acid

'espiraor% al&alosis uncompensaed

"ormal

↑ ↓

pH PaCO2 HCO3 Acid

'espiraor% al&alosis pariall% compensaed

 "ormal

'espiraor% al&alosis oall% compensaed

↓ Acid

0eabolic acidosis uncompensaed pH PaCO2 HCO3

0eabolic acidosis pariall% compensaed pH

"ormal

↓ ↓ Acid

"ormal

0eabolic acidosis oall% compensaed

 ↓ Acid

"ormal

0eabolic al&alosis uncompensaed

↓ ↓ Acid

"ormal

↓ ↓ Acid

"ormal

 Acid

"ormal

↑ Base ↑

pH HCO3

Base

↑

PaCO2 HCO3

PaCO2

Base



pH

0eabolic al&alosis pariall% compensaed

Base

↓

pH PaCO2 HCO3

Base

↓

PaCO2 HCO3

Base



pH PaCO2 HCO3

Base

↑ ↓

pH PaCO2 HCO3

↑ Base

↑ ↑

Acid

0eabolic al&alosis oall% compensaed pH PaCO2 HCO3

"ormal

Base

 ↑ ↑