Chemical Pathology

1. All requests must be made using the PER-PAT 301 Form except for Drug of Abuse (DOA) request for Medical check-up and Medico legal cases, Cord Blood TSH Screening test and TDM testing.

2. National Congenital Hypothyroidism Screening Form – to be used for Cord Blood TSH Screening.

3. Therapeutic Drug Monitoring (TDM) Request Form – to be used for TDM testing.

4. Borang Permintaan Ujian Pengesanan Dadah Dalam Air Kencing (UPD-1) dan Borang 'Chain-Of-Custody' (COC) - to be used for Drug of Abuse (DOA) request for Medical check-up and Medico legal cases.

5. Additional verbal requests using existing primary specimens shall be followed by new request form with details of requester, date and time of request. Acceptance of this requests are subjected to specimen stability or according to unit criteria.

1. Blood for clinical chemistry and immunochemistry assays shall be collected in plain tube. The anticoagulant used for blood glucose and lactate are Sodium Fluoride / Disodium EDTA or Potassium Oxalate + Sodium Fluoride while anticoagulant used for blood HbA1c, Ammonia and Troponin i (in Hospital Jasin and Hospital Alor Gajah) are K2 EDTA.

2. A minimal tourniquet pressure should be applied in performing venesection to avoid forcing free fluid out of the distal capillaries resulting in haemoconcentration and spurious elevation of protein and protein-bound substances e.g Calcium and free-T4.

3. Many patients requiring clinical chemistry investigations are receiving intravenous infusion. Venesection done proximal to the infusion site will cause contamination. This will result in a wrong representation of the actual concentration of the analytes.

4. Do not mix blood sample from different containers. Certain containers e.g., KF+Na2 EDTA or K2 EDTA tubes contain Potassium salts and chelating agents which will cause error in the result for Potassium and Calcium analysis.

Guide of collection for specific type of specimens can be found here.

List of tubes / containers can be found here.