O Tests

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Oestradiol

  • Test Name: Oestradiol
  • Laboratory: Biochemistry
  • Specimen Type: Serum, plasma
  • Specimen Container: Yellow, green for WRH in house samples only.
  • Specimen Volume: 4mls
  • Specimen Requirements: N/A
  • Other details: See Reference Ranges
  • Frequency of analysis/ assay: Daily
  • Turnaround Time: 3 working days
  • Phone alert limits: N/A
  • Preanalytical stability at room temp:

Oligoclonal Bands

  • Test Name: Oligoclonal Bands
  • Laboratory: Biochemistry
  • Specimen Type: Serum and CSF
  • Specimen Container: Yellow (serum), Universal white top for CSF
  • Specimen Volume: 4mls blood Min 1 ml CSF
  • Specimen Requirements: Parallel serum sample to be sent with CSF sample.
  • Other details: N/A
  • Frequency of analysis/ assay:
  • Turnaround Time: 3 weeks
  • Phone alert limits: N/A
  • Preanalytical stability at room temp:

Oral infections / Dental abscesses

  • Test Name: Oral infections / Dental abscesses
  • Laboratory: Microbiology
  • Specimen Type: Pus, Swabs - Mouth / buccal, Tongue.
  • Specimen Container: Sterile universal container, amies swab.
  • Specimen Volume: At least 1ml of pus / if possible swab should be well soaked in pus
  • Specimen Requirements: Refrigerate if delivery to the laboratory is delayed.
  • Other details: N/A
  • Frequency of analysis/ assay: Daily
  • Turnaround Time: Microscopy for Vincent's organisms the same day. Culture 2-4 days
  • Phone alert limits: Group A streptococci isolates, Group B streptococci isolates from antenatal, postnatal and neonatal patients, new MRSA isolates from hospital in-patients and new VRE isolates are all phoned to the requesting clinicians
  • Preanalytical stability at room temp: N/A

 

Organic Acids

  • Test Name: Organic Acids
  • Laboratory: Biochemistry Referred Test
  • Specimen Type: Random urine
  • Specimen Container: Universal Container (white top)
  • Specimen Volume: 5 mls
  • Specimen Requirements: Send sample to lab straightaway. Boric acid (red top) is unsuitable.
  • Other details: Clinical details are essential on the request form.
  • Frequency of analysis/ assay:
  • Turnaround Time: 3 weeks
  • Phone alert limits: N/A
  • Preanalytical stability at room temp: Sample must be frozen immediately in the lab.

Osmolality-Serum

  • Test Name: Osmolality-Serum
  • Laboratory: Biochemistry
  • Specimen Type: Serum or plasma
  • Specimen Container: Yellow or green
  • Specimen Volume: 4 mls
  • Specimen Requirements:
  • Other details:
  • Frequency of analysis/ assay: Once daily.
  • Turnaround Time: Routine - 2 days. Urgent < 3 hours
  • Phone alert limits: N/A
  • Preanalytical stability at room temp:

Osmolality-Urinary

  • Test Name: Osmolality-Urinary
  • Laboratory: Biochemistry
  • Specimen Type: Random urine
  • Specimen Container: Sarstedt Urine Z Monovette®
  • Specimen Volume: 10 mls
  • Specimen Requirements: Samples collected in any other suitable container (e.g. White Top Universal) must be transferred to labelled monovette prior to sending to laboratory. Any container other than the Sarstedt Urine Z Monovette ® will not be processed (including white top universal or Red Top Boric acid container)
  • Other details: 
  • Frequency of analysis/ assay: Once daily.
  • Turnaround Time: Routine - 2 days. Urgent < 3 hours
  • Phone alert limits: N/A
  • Preanalytical stability at room temp:

 

Osteomyelitis. See Wounds - Deep seated

Ova & Parasites (microscopy)

  • Test Name: Ova & Parasites (microscopy)
  • Laboratory: Microbiology
  • Specimen Type: Faeces, Urine, Sellotape slide, Jejunal aspirate.
  • Specimen Container: Sterile universal container with/without a spoon.
  • Specimen Volume: Faeces 1-2g (spoonful). At least 10ml urine. At least 1ml of fluid.
  • Specimen Requirements: Urine for Schistosoma haematobium - collect total urine between 10am and 2pm and send to the laboratory.
  • Other details: Failure to supply relevant clinical details with requests for Ova & Parasites will result in non-processing of specimens.
  • Frequency of analysis/ assay: Daily
  • Turnaround Time: 1-3 days
  • Phone alert limits: Specimens positive for ova or parasites will be phoned to the requesting clinician
  • Preanalytical stability at room temp: N/A

 


Oxalate - Blood (oxalic acid)

  • Test Name: Oxalate - Blood (oxalic acid)
  • Laboratory: Biochemistry Referred Test
  • Specimen Type: Serum
  • Specimen Container: Yellow
  • Specimen Volume: 4mls
  • Specimen Requirements: Send sample to lab within 30 minutes.
  • Other details: Send a separate request form and sample.
  • Frequency of analysis/ assay:
  • Turnaround Time: 3 weeks
  • Phone alert limits: N/A
  • Preanalytical stability at room temp: Sample must be separated and frozen in lab < 1 hour.

Oxalate - Urine

  • Test Name: Oxalate - Urine
  • Laboratory: Biochemistry Referred Test
  • Specimen Type: 24 hour acidified urine
  • Specimen Container: 24 hour container with acid preservative available from the biochemistry lab.
  • Specimen Volume: Complete collection
  • Specimen Requirements: This test is only available by special request.
  • Other details:
  • Frequency of analysis/ assay:
  • Turnaround Time: 3 weeks
  • Phone alert limits: N/A
  • Preanalytical stability at room temp: N/A