RAST testing

Immunology

5 routine working days

Red Blood Cell Count (part of FBC)

Haematology

Urgent within 1 hour. Routine within 4 hours.

Red Cell Distribution Width (part of FBC)

Haematology

Urgent within 1 hour. Routine within 4 hours.

Red cell plasmalogens

Biochemistry

10 weeks

Renal stones (calculi)

Biochemistry

5 weeks

Renal stones investigation

Biochemistry

Refer to individual test on the website

Renin concentration, plasma

Biochemistry

Within 2 weeks

Respiratory Culture

Microbiology

4 days

Respiratory Viral PCR

Microbiology

2 days

Reticulocyte Count (part of FBC)

Haematology

Urgent within 1 hour. Routine within 4 hours

Reticulocyte Haemoglobin Equivalent (RET-He)

Haematology

Retinol binding protein, urine

Biochemistry

2 weeks

Rheumatoid Factor

Immunology

3 routine working days

Ribosomal Antibodies

Immunology

14 days

Risperidone

Biochemistry

5 working days

Ristocetin Co-factor

Haemostasis

Usually within 7 days.

Rivaroxaban Assay

Haemostasis

RNA polymerase III antibodies

Immunology

21 calendar days

Ro52 and Ro60 Antibodies

Immunology

3 routine working days

Rotavirus and Adenovirus Tests

Microbiology

Rubella IgG

Microbiology

3 days

Rubella IgM

Microbiology

6 days