A - Z Test List

Test List: F

# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

For reference ranges related to any specific test, please email refranges@hslpathology.com

Please note this list may not show our full repertoire of tests. If you need further information, please call +44 (0) 20 7307 9400

Please click here to read our user guide. More user guides will be available soon.

Important notice regarding biotin interference in laboratory tests – please click here to read our update.

Expand All | Collapse All

Fabry Disease, X-linked – GLA gene sequencing

Sample Reqs

A
[9]

Special Instructions

[9] Clinical history must be provided.

Facioscapulohumeral Muscular Dystropy (FSHD) – D4Z4 repeat deletion

Sample Reqs

A
A
A
[9]

Special Instructions

[9] Clinical history must be provided.

Factor II Assay

Sample Reqs

C (Frozen) [9] [18]

Special Instructions

[9] Clinical history must be provided.
[18] Citrate Samples
Samples should be double spun and separated and frozen within 4-8 hours of sample taking, if a delay is expected with transportation to the laboratory, samples must be transported as frozen.

Factor II Prothrombin – G20210A mutation

Sample Reqs

A
[9]

Special Instructions

[9] Clinical history must be provided.

Factor V Assay

Sample Reqs

C (Frozen) [9] [18]

Special Instructions

[9] Clinical history must be provided.
[18] Citrate Samples
Samples should be double spun and separated and frozen within 4-8 hours of sample taking, if a delay is expected with transportation to the laboratory, samples must be transported as frozen.

Factor V Leiden – G1691A mutation

Sample Reqs

A
[9]

Special Instructions

[9] Clinical history must be provided.

Factor VII Assay

Sample Reqs

C (Frozen) [9] [18]

Special Instructions

[9] Clinical history must be provided.
[18] Citrate Samples
Samples should be double spun and separated and frozen within 4-8 hours of sample taking, if a delay is expected with transportation to the laboratory, samples must be transported as frozen.

Factor VII Deficiency – F7 Gene Variant Analysis (Known Genotype)

Sample Reqs

A
A
 (Whole blood 10ml) [40]

Special Instructions

[40] Informed Consent is required for these tests.

Factor VII Deficiency – F7 Gene Variant Analysis (Unknown Genotype)

Sample Reqs

A
A
  (Whole blood 10ml) [40]

Special Instructions

[40] Informed Consent is required for these tests.

Factor VIII Assay

Sample Reqs

C (Frozen) [9] [18]

Special Instructions

[9] Clinical history must be provided.
[18] Citrate Samples
Samples should be double spun and separated and frozen within 4-8 hours of sample taking, if a delay is expected with transportation to the laboratory, samples must be transported as frozen.

Factor VIII Inhibiting Antibody

Sample Reqs

C C [18]

Special Instructions

[18] Citrate Samples
Samples should be double spun and separated and frozen within 4-8 hours of sample taking, if a delay is expected with transportation to the laboratory, samples must be transported as frozen.

Factor IX Assay

Sample Reqs

C (Frozen) [9] [18]

Special Instructions

[9] Clinical history must be provided.
[18] Citrate Samples
Samples should be double spun and separated and frozen within 4-8 hours of sample taking, if a delay is expected with transportation to the laboratory, samples must be transported as frozen.

Factor IX Inhibiting Antibody

Sample Reqs

C C [18]

Special Instructions

[18] Citrate Samples
Samples should be double spun and separated and frozen within 4-8 hours of sample taking, if a delay is expected with transportation to the laboratory, samples must be transported as frozen.

Factor X Assay

Sample Reqs

C (Frozen) [9] [18]

Special Instructions

[9] Clinical history must be provided.
[18] Citrate Samples
Samples should be double spun and separated and frozen within 4-8 hours of sample taking, if a delay is expected with transportation to the laboratory, samples must be transported as frozen.

Factor Xa (Heparin)

Sample Reqs

C (Frozen)

Special Instructions

Factor X Deficiency – F10 Gene Variant Analysis (Known Genotype)

Sample Reqs

A
A
  (Whole blood 10ml) [40]

Special Instructions

[40] Informed Consent is required for these tests.

Factor X Deficiency – F10 Gene Variant Analysis (Unknown Genotype)

Sample Reqs

A
A
  (Whole blood 10ml) [40]

Special Instructions

[40] Informed Consent is required for these tests.

Factor XI Assay

Sample Reqs

C (Frozen) [9] [18]

Special Instructions

[9] Clinical history must be provided.
[18] Citrate Samples
Samples should be double spun and separated and frozen within 4-8 hours of sample taking, if a delay is expected with transportation to the laboratory, samples must be transported as frozen.

Factor XI Deficiency – F11 Gene Variant Analysis (Known Genotype)

Sample Reqs

A
A
  (Whole blood 10ml) [40]

Special Instructions

[40] Informed Consent is required for these tests.

Factor XI Deficiency – F11 Gene Variant Analysis (Unknown Genotype)

Sample Reqs

A
A
  (Whole blood 10ml) [40]

Special Instructions

[40] Informed Consent is required for these tests.

Factor XII Assay

Sample Reqs

C (Frozen) [9] [18]

Special Instructions

[9] Clinical history must be provided.
[18] Citrate Samples
Samples should be double spun and separated and frozen within 4-8 hours of sample taking, if a delay is expected with transportation to the laboratory, samples must be transported as frozen.

Factor XIII Assay

Sample Reqs

C (Frozen) [9] [18]

Special Instructions

[9] Clinical history must be provided.
[18] Citrate Samples
Samples should be double spun and separated and frozen within 4-8 hours of sample taking, if a delay is expected with transportation to the laboratory, samples must be transported as frozen.

Faecal Calprotectin/Elastase Profile

Profile details

Faecal Calprotectin

Faecal Elastase

Sample Reqs

RF

Special Instructions

 

Faecal Elastase

Sample Reqs

RF

Special Instructions

Faecal Fat (1 Day Collection)

Sample Reqs

LF [6]

Special Instructions

[6] Contact the Referrals Department before taking and sending sample to the laboratory.

Faecal Fat (3 day)

Sample Reqs

LF [6]

Special Instructions

[6] Contact the Referrals Department before taking and sending sample to the laboratory.

Faecal Lactoferrin

Sample Reqs

RF

Special Instructions

Faecal Occult Blood/FOB (immunochemical/FIT) – NEW

Sample Reqs

QFIT

Special Instructions

Faecal Sugar Chromatography

Sample Reqs

RF (Frozen)

Special Instructions

Faecal Urobilinogen

Sample Reqs

RF

Special Instructions

Familial Adenomatous Polyposis (FAP) – full sequencing across 18 genes + deletions/duplications

Sample Reqs

A
A
[9] [11] Requires patient informed consent

Special Instructions

[9] Clinical history must be provided.
[11] Patient consent required. Consent Form can be found at the back of this guide.

Familial Exudative Vitreoretinopathy (FEVR) NGS Panel – full sequencing NDP + FZD4 + LRP5 + TSPAN12 + ZNF408 genes

Sample Reqs

A
A
[9]

Special Instructions

[9] Clinical history must be provided.

Familial Hypercholesterolaemia – LDLR + APOB + PCSK9 + LDLRAP1 screening

Sample Reqs

A
A
[9]

Special Instructions

[9] Clinical history must be provided.

Familial Hypocalciuric Hypercalcaemia (FHH) Panel – full sequencing CASR + AP2S1 + GNA11 genes

Sample Reqs

A
A
[9]

Special Instructions

[9] Clinical history must be provided.

Familial Mediterranean Fever – hotspot sequencing MEFV gene

Sample Reqs

A
[9]

Special Instructions

[9] Clinical history must be provided.

Familial Medullary Thyroid Carcinoma – hotspot sequencing RET gene

Sample Reqs

A
[9] [11] Requires patient informed consent

Special Instructions

[9] Clinical history must be provided.
[11] Patient consent required. Consent Form can be found at the back of this guide.

Farmers Lung Precipitins

Sample Reqs

B

Special Instructions

Fasciola Hepatica Antibodies (Liver Fluke)

Sample Reqs

B

Special Instructions

FAST Chlamydia PCR Swab

Sample Reqs

PCR Swab

Special Instructions

Fast Chlamydia Urine

Sample Reqs

FCRU

Special Instructions

FAST CT/GC PCR Swab

Sample Reqs

PCR Swab

Special Instructions

FAST CT/GC Rectal PCR Swab

Sample Reqs

PCR Swab

Special Instructions

FAST CT/GC Throat PCR Swab

Sample Reqs

PCR Swab

Special Instructions

Fast CT/GC Urine

Sample Reqs

FCRU

Special Instructions

FAST Gonorrhoea PCR Swab

Sample Reqs

PCR Swab

Special Instructions

FAST Gonorrhoea Urine

Sample Reqs

FCRU

Special Instructions

FAST Screen SHORT

Sample Reqs

B FCRU

Special Instructions

FAST Screen SHORT with Swab

Sample Reqs

B PCR

Special Instructions

FAST Screen with Swab

Sample Reqs

B PCR

Special Instructions

FAST Screen with Urine

Sample Reqs

B FCRU

Special Instructions

Fat Globules in Faeces

Sample Reqs

RF

Special Instructions

Fatty Acid Oxidation Deficiency NGS Panel – full sequencing across 22 genes

Sample Reqs

A
A
[9]

Special Instructions

[9] Clinical history must be provided.

Female Hormone Profile

Profile details

LH

FSH

Prolactin

Oestradiol (17-Beta)

Sample Reqs

B

Special Instructions

 

Ferritin

Sample Reqs

B

Special Instructions

Fibrinogen

Sample Reqs

C [4] [18]

Special Instructions

[4] Send to the laboratory without delay.
[18] Citrate Samples
Samples should be double spun and separated and frozen within 4-8 hours of sample taking, if a delay is expected with transportation to the laboratory, samples must be transported as frozen.

Fibrotest (Liver Fibrosis)

Sample Reqs

B

Special Instructions

Filaria (Lymphatic and Non-Lymphatic) Antibodies

Sample Reqs

B [9] [14]

Special Instructions

[9] Clinical history must be provided.
[14] Provide details of travel history.

First Trimester Screening Bloods only (Risk to be calculated by requesting clinician)

Profile details

Free β-hCG

PAPP-A

Free β-hCG and PAPP-A in serum and sonographic determination of nuchal translucency (NT) are markers of choice to identify women at increased risk of Down Syndrome during the first trimester (week 11-13) of pregnancy.

Sample Reqs

B

Special Instructions

 

Fish Components

Sample Reqs

B

Special Instructions

FK506 (Tacrolimus/Prograf)

Sample Reqs

A [4]

Special Instructions

[4] Send to the laboratory without delay.

Flecainide (Tambocor)

Sample Reqs

A

Special Instructions

FLT3-ITD and FLT3-TKD screening assay

Sample Reqs

A

Special Instructions

Fluid Culture

Sample Reqs

SC

Special Instructions

Fluid Cytology

Sample Reqs

Fluid [4]

Special Instructions

[4] Send to the laboratory without delay.

Fluid for Crystals

Sample Reqs

SC

Special Instructions

Fluoride (Urine)

Sample Reqs

RU

Special Instructions

Fluoropyrimidine Toxicity screening – 5 common mutations

Sample Reqs

A
[9]

Special Instructions

[9] Clinical history must be provided.

Fluoxetine (Prozac)

Sample Reqs

A [4]

Special Instructions

[4] Send to the laboratory without delay.

Folate (Red Cell)

Sample Reqs

A

Special Instructions

Folate (Serum)

Sample Reqs

B

Special Instructions

Fragile X Syndrome screen – FMR1 repeat analysis PCR (3 weeks) + Southern Blot (8 weeks) if required

Sample Reqs

A
A
A
[9]

Special Instructions

[9] Clinical history must be provided.

Free Cortisol (Urine)

Sample Reqs

CU

Special Instructions

Free Fatty Acids

Sample Reqs

B (Frozen) [1]

Special Instructions

[1] Contact the laboratory for special sample tubes/containers/instructions.

Free T3

Sample Reqs

B

Special Instructions

Free T4

Sample Reqs

B

Special Instructions

Friedreich Ataxia – frataxin gene repeat analysis

Sample Reqs

A
[9]

Special Instructions

[9] Clinical history must be provided.

Fructosamine

Sample Reqs

B

Special Instructions

Fructose – Plasma

Sample Reqs

G (Frozen)[7]

Special Instructions

[7] Sample should be separated and frozen if sending overnight.

FSH

Sample Reqs

B

Special Instructions

Full Blood Count

Sample Reqs

A

Special Instructions

Fungal ID + Sens

Sample Reqs

Fungal sample / STM

Special Instructions

HSL is a partnership between The Doctors Laboratory, Royal Free London NHS Foundation Trust (the Royal Free London) and University College London Hospitals NHS Foundation Trust (UCLH)

Health Services Laboratories
Health Services Laboratories
Health Services Laboratories