COPD and Asthma Physiology Score (CAPS)

Description

Wildman et al developed an score to measure the physiologic derangement associated with an acute exacerbation of COPD and/or asthma. The authors are from Northern General Hospital Sheffield, Intensive Care National Audit & Research Centre London, and the London School of Hygiene and Tropical Medicine.

Patient selection: exacerbation of an obstructive airways disease (COPD, asthma, both)

Parameters:

(1) heart rate in beats per minute

(2) mean arterial pressure (MAP) in mm Hg

(3) arterial pH

(4) serum sodium in mmol/L

(5) blood urea in mmol/L

(6) serum creatinine in µmol/L

(7) serum albumin in g/L

(8) white blood cell count in 10^9/L

Parameter	Finding	Points
heart rate	< 80	3
	80 to 109	0
	110 to 129	2
	130 to 149	3
	150 to 169	5
	>= 170	7
MAP	< 40	19
	40 to 49	12
	50 to 59	9
	60 to 69	6
	70 to 89	3
	90 to 99	0
	>= 100	4
pH	< 7.00	9
	7.00 to 7.09	6
	7.10 to 7.19	3
	7.20 to 7.24	1
	>= 7.25	0
serum sodium	< 130	6
	130 to 134	2
	135 to 144	0
	>= 145	2
blood urea	< 2.5	0
	2.5 to 6.7	8
	6.8 to 11.9	16
	12 to 17.9	22
	>= 18.0	24
serum creatinine	< 150	0
	150 to 199	5
	>= 200	8
serum albumin	< 15	20
	15 to 19.9	14
	20 to 24.9	8
	25 to 29.9	6
	30 to 34.9	4
	>= 35	0
WBC count	< 4	7
	4 to 14.9	0
	15 to 19.9	1
	20 to 24.9	4
	>= 25	7

total CAPS =

= SUM(points for all 8 parameters)

Interpretation:

• minimum score: 0

• maximum score: 100

• The higher the score the worse the overall survival.

X =

= (0.07530 * (score)) - 3.367

probability of mortality =

= 1 / (1 + EXP((-1) * X))

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Description

Specialty

Objective

ICD-10

COPD and Asthma Physiology Score (CAPS)

Purpose: To evaluate a patient with an exacerbation of COPD or asthma using the COPD and Asthma Physiology Score (CAPS) of Wildman et al.

Description

Specialty

Objective

ICD-10