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Biochemistry

Paracetamol

Paracetamol

Reference Range

Not Applicable - use in overdose only

  • Turnaround Time: 1 Hour (with urgent request)

Related Tests PT / INR and Activated Partial Thromboplastin Time (APTT)

Parathyroid Hormone (PTH)

Parathyroid Hormone (PTH)

Reference Range

2.7 – 11.1 pmol/L

(This reference range has been derived by assessment of literature and local data)

PTH should be interpreted in the context of calcium and albumin measurements. A PTH value inside reference limits in the presence of elevated corrected calcium values may indicate PTH excess.

 

  • Turnaround Time: 24 hours

Related Tests Calcium (adjusted) Magnesium (serum) Phosphate (serum) Vitamin D (25-OH VitD)

Phenytoin

Phenytoin

Reference Range

Therapeutic range:  10.0 - 20.0 mg/L

*Minimum time for patient to reach steady state without loading or after dosage change is 7 days*

  • Turnaround Time: 24 hours
Phosphate (serum)

Phosphate (serum)

Reference Range

0.8-1.5 mmol/L

 

  • Turnaround Time: 24 hours

Related Tests Albumin Calcium (adjusted) Parathyroid Hormone (PTH) Phosphate (Urine) Vitamin D (25-OH VitD)

Phosphate (Urine)

Phosphate (Urine)

Reference Range

15-50 mmol/24hr 

  • Turnaround Time: 1 day

Related Tests Calcium (adjusted) Creatinine Parathyroid Hormone (PTH) Phosphate (serum) Vitamin D (25-OH VitD)

Porphyrins/Porphyria analysis (Urine/Faecal/Blood specimens)

Porphyrins/Porphyria analysis (Urine/Faecal/Blood specimens)

Reference Range

Specialist investigations: Ref ranges reported by referral laboratory (Cardiff porphyria service)

  • Turnaround Time: 2-3 weeks
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