Table V.

Error categories within work processes with the highest proportion of errors recorded.

MERS-TM code	Error	n	%
BC	Clots (inappropriate blood mixing with anticoagulant)	251	59.5
	Blood collected into erroneous type of blood bag	38	9.0
	Excess air in the unit	37	8.8
	Sampling (erroneous or lacking)	35	8.3
	Errors in the procedure of apheresis	15	3.6
	Inappropriate puncture site disinfection	14	3.3
	Errors in handling sterile welding device	13	3.1
	Errors in scale handling	13	3.1
	Other	6	1.4
	Total	422	100.0
CP	Errors in handling devices for blood component separation	51	26.8
	Erroneous choice of units for further processing	46	24.2
	Errors in processing technique	34	17.9
	Computer records of manufacture (erroneous or lacking)	20	10.5
	Errors in welding	10	5.3
	Erroneous entry of blood product volume	7	3.7
	Other	22	11.6
	Total	190	100.0
DR	Donor file duplicates in computer system	60	27.1
	Erroneous entry of donation ID number in computer system	52	23.5
	Erroneous entry of donor personal data in computer system	50	22.6
	Errors on entering puncture failure code in computer system	18	8.1
	Erroneous entry of donor card issuing code	15	6.8
	Other	26	11.8
	Total	221	100.0
LA	Unlabelled donations from female donors	216	44.8
	Erroneous blood group on donation label	79	16.4
	Lack of ID number on blood bag	47	9.8
	Lack of label on ASA use	41	8.5
	Blood collection date erroneous or lacking	18	3.7
	ID number lacking on the sample	16	3.3
	Sample erroneously labelled	15	3.1
	Product name erroneously declared	11	2.3
	Blood product volume erroneously declared	10	2.1
	Other	29	6.0
	Total	482	100.0
UI, SD, US	Blood product issued without computer record	53	28.2
	Erroneous data entry in computer system	37	19.7
	Blood product found on stock after expiry date	22	11.7
	Erroneous blood product issued	18	9.6
	Untimely stock updating from hospital transfusion units	16	8.5
	Inappropriate blood product storage	12	6.4
	Issuing reserved blood product	7	3.7
	Other	23	12.2
	Total	188	100.0