order of draw lifelabs

Most platelet clumping occurs in EDTA collected specimens. This test panel can be used to assess recent or previous infection with SARS-CoV-2 as well as determine the presence of antibodies in individuals who have been vaccinated against the virus. %PDF-1.5 % British Columbia. If your flight is within the next five days and you have received your FlyClear requisition, please contact a MyVisit coordinator 1-416-993-9579 (Monday Friday, 9am-5pm EST). WebOrder your FlyClear test and receive your FlyClear test requisition.

The information gathered can help confirm the cause of health concerns or rule out any potential concerns. FIT checks someones stool (poop) for tiny amounts of blood, which could be caused by colon cancer and some pre-cancerous polyps (growths in the colon or rectum that can turn into cancer over time).

assess risk of ovarian hyperstimulation syndrome (OHSS) caused by exaggerated response to gonadotropin treatment. A highly sensitive and personalized molecular residual disease (MRD) test using circulating tumor DNA (ctDNA), custom designed for each patient to help quantify tumour burden and identify relapse earlier than the standard of care tools. Consult LTI. Were pleased to share with you the launch of a free Health Assessment tool in LifeLabs MyCareCompass online health portal, available to Ontario Weve introduced the Fibrosis-4 (FIB-4) index in Ontario as a convenient testing option, with promising clinical utility in defining NAFLD patients As an essential service, LifeLabs continues to provide diagnostic laboratory testing at many of our Patient Service Centres. We are happy to share his story. Fecal Calprotectin Testing Select your ordered Provinces Rush Test to start booking: Book your Home Visit appointment with the, COVID-19 Antibody Blood (serology) testing. HPV. D R A W B L O O D C U L T U R E S F I R S T 1 Light Blue 2 Black 3 Yellow 4 Royal Blue (no additive) 5 Red 6 Gold 7 Green 8 Royal Blue (K2EDTA) 9 Lavender 10 Grey Mix 3-4 times Mix 8 10 times Mix 8 10 times Mix 8 10 times Mix 5 6 I ordered a blood film examination along with the CBC, but the blood film was not done. The second leading cause of death among Canadians, heart attacks are often a silent killer with no signs or symptoms before they strike. View

FIT checks for the presence of occult blood in the stool, which can be an early sign of colorectal cancer and/or pre-cancerous lesions. FIT is a safe and painless at-home cancer screening test. Personalized medicine is the new frontier of modern medicine.With the largest professional genetic testing lab in Canada.

WebOrder your FlyClear test and receive your FlyClear test requisition.

The 25-Hydroxy Vitamin D test is a simple blood test and the best way to monitor Vitamin D levels.

WebOrder o f DRAW. For Inquiries contact LifeLabs Client Information Centre 1-800-431-7206.

For Inquiries contact LifeLabs Client Information Centre 1-800-431-7206. Book your Home Visit appointment with the MyVisit portal or, if your flight is within the next five days, contact a MyVisit coordinator 1-416-993-9579 (Monday Friday, 9am-5pm EST) Have you sent off your poop? The Calprotectin test is hence very useful to differentiate between IBS and IBD. 25-Hydroxy Vitamin D is a blood test to help you measure your vitamin D levels. Spotlight on our LifeLabs colleague ce LifeLabs is Customizing Care for Customers on the Spectrum. If you continue to use this site we will assume that you are happy with it. Dawson Creek; Kamloops; Kimberley; Lower Mainland; Nelson; Prince George & Quesnel From suppression of women's rights to a land of opportunity, LifeLabs Named as Winner of 2022 Workplace Benefits Award, LifeLabs forms new collaboration with Natera to offer molecular residual disease (MRD) testing for cancer in Canada, Recognizing and Caring for our Employees, Empowering our Tomorrow, Empowering our Customers, Empowering our Tomorrow, LifeLabs named one of the top employers in Greater Toronto for 2022, LifeLabs Awarded 2021 WorkPlace Benefit Award for Effective Mental Health Programs, LifeLabs Expanding Community-Based COVID-19 Testing Options Across Ontario, LifeLabs appoints Jennifer Cudlipp as Chief Operating Officer, LifeLabs surpasses 1 million COVID-19 molecular tests completed, LifeLabs Confirms that all Members of Santas Workshop have Tested Negative for COVID-19, LifeLabs WorkClear Program to Support Santas Workshop in the lead up to the Holiday Season, LifeLabs partners with Thrive Health to make it easier and safer for Canadians to confidently return to work during the COVID-19 pandemic, LifeLabs releases open letter to customers following cyber-attack, LifeLabs is the first lab in Canada to become Accessibility Certified, LifeLabs partnering with Sun Life to offer pharmacogenomics testing to plan members on short and long-term disability plans, Jennifer Cudlipp named President of Excelleris, They gave, we matched, and together, we made a major impact in our communities, LifeLabs raises $64,000 in support of children with cancer for the Pediatric Oncology Group of Ontario, Non-invasive Prenatal Testing Leads to Discovery of Treatable Cancer, LifeLabs tests and services added to League health benefits offerings through new strategic partnership, LifeLabs to deliver laboratory collection services in Saskatchewan, Resumption of Fecal Immunochemical Test (FIT) Testing in BC, CLIENT NOTICE - ONTARIO: CHANGE TO CEA TESTING METHODOLOGY, False Immunoassay Results Due to Interfering Substances, Online testing service for sexually-transmitted infections expands in BC, LifeLabs is first lab in Canada to perform simple prenatal screening blood test.

However, only a subset of these types is considered high-risk for the development of cervical cancer and its precursor lesions. H. pylori Stool Antigen Combined with other clinical factors like total PSA and age, the test produces a likelihood score of discovering aggressive prostate cancer upon biopsy.

The third leading cause of cancer death, when prostate cancer is detected early, the more likely it can be successfully treated.

What other test(s) can be done to make a definitive diagnosis of alpha or beta thalassemia trait? My patients CBC was suggestive of thalassemia. The device is small and light-weight and hangs around your neck connecting cable to sensors attached to your chest. With HPV the primary cause of cervical cancer, the HPV test detects the presence of high-risk HPV strain(s). There are more than 118 different types of HPV and approximately 40 different HPVs that can infect the human anogenital mucosa. We are here to help you find the answers you need, when you and your patients need it most. Consult LTI. Book your Home Visit appointment with the MyVisit portal or, if your flight is within the next five days, contact a MyVisit coordinator 1-416-993-9579 (Monday Friday, 9am-5pm EST) MyVisit Pre-departure testing offers: COVID-19 PCR/NAAT swab testing The > or < on a report indicates that the concentration in the sample is either greater than or less than the measureable limits of that test.

If your flight is within the next five days and you have received your FlyClear requisition, please contact a MyVisit coordinator 1-416-993-9579 (Monday Friday, 9am-5pm EST).
We are leading the development of innovative test solutions. With one in six couples across Canada experiencing difficulty in becoming pregnant, AMH levels can provide valuable insight into predicting a response for IVF treatment. Please fax your order form to the fax number that corresponds with the area where you are located: For rush results (NAAT within 12 hours and PCR within 24 hours), COVID-19 PCR (24h) WebTo request supplies, complete either the Healthcare Provider Phlebotomy Order Form or Healthcare Provider (No Phlebotomy) Order Form and forward to your local LifeLabs location. Web Order of Draw for Multiple Tube Collections Designed for Your Safety Handle all biologic samples and blood collection sharps (lancets, needles, luer adapters and blood collection sets) according to the policies and procedures of your facility. When I order a Broad Spectrum Toxicology screen do I need to list specific drugs of interest on the requisition? Oakville, Mississauga, Brampton, Toronto, Pickering, Ajax, Whitby, Oshawa: York Region (Richmond Hill, Newmarket, Markham, Aurora, Thornhill, Woodbridge): London Area (including area south of Kincardine to Windsor): Golden Triangle (KW, Guelph, Cambridge, Fergus area): Barrie & Simcoe County (includes Collingwood and Stayner): Belleville and surroundings West to Port Hope, North to Haliburton, East to Napanee and South to Picton: Ottawa and surroundings North to Deep River, East to Cassleman, south to Lancaster: Brockville and surroundings- Kingston, East to Cornwall, North to Lanark: Book an appointment at a LifeLabs location below.

Please try again later. We are pleased to offer electrocardiograms (ECG) and Holter monitoring at many of our Patient Services Centres across the country. Anti-Mllerian Hormone (AMH) Anti-CCP. We use cookies to ensure that we give you the best experience on our website. If a requisition is emailed by a health care provider or patient, please remind the patient to allow for 24 hours processing time when booking an appointment. When colorectal cancer is found and treated early, the chances of successful treatment are better.

Webtests when testing is performed at a LifeLabs testing laboratory.

Hemoglobin fractionation (Hemoglobin electrophoresis) will allow for a diagnosis of Beta-Thalassemia trait , but a definitive diagnosis of alpha thalassemia trait requires genetic testing. Having lab work done has never been easier. WebOrder of Draw and Order of Transfer PA03-005 Rev 1.02 Page 1 of 1 Visit www.albertaprecisionlabs.ca for the most current version of this document Blood collection tubes must be filled in a specific order to minimize

LifeLabs Genetics is at the forefront of genetic testing and personalized medicine in Canada. Osteoporosis Select your ordered Provinces Rush Test to start booking: Book your Home Visit appointment with the, COVID-19 Antibody Blood (serology) testing.

Please visit the LifeLabs Genetics website for more details, Please visit the LifeLabs Genetics website for more details.

(note: HPV samples will be obtained by your healthcare provider).

Serum Allergy Testing

Where no ANA is detected but we observe a cytoplasmic pattern we have to indicate negative for ANA but best practice demands that we report the presence of these cytoplasmic autoantibodies.

Pre-analytical error such as sample misidentification is another possibility. Anti-CCP No. In order to meet the unique needs of each provincial healthcare system, please use the form for the province in which you are located. Book your appointment online here.

A PULS test may also be used in conjunction with a cholesterol test for a more accurate picture of your heart health. They may also be ordered to establish a baseline for your health, monitor your health, or as part of an overall wellness program.>. The opiate screen can detect natural opiates such as codeine and morphine.

fentanyl, tramadol, meperidine), methadone, or buprenorphine.

WebPHLEBOTOMY ORDER OF DRAW sour_ When using a collection set for and a coagulation (citrate) is the first tube to be drawn, a discard tahe be drawn first The discard tube must used to fill collectim set tubing's 'dead space. We want to provide the highest quality lab results as quickly as possible. A SMARTVascular Dx Test measures the traces of proteins that leak from cardiac lesions in the blood vessel walls. Most adults will develop an HPV infection in their lifetime without knowing it as HPV often doesnt have any symptoms.

My patients CBC showed platelet clumping and a platelet count could not be done.

www.LifeLabs.com Uncontrolled Copy ID# 30676 Effective 1/9/2017 Order o fDRAW.

If you continue to use this site we will assume that you are happy with it.

Select your ordered Provinces Rush Test to start booking: Book your Home Visit appointment with the, COVID-19 Antibody Blood (serology) testing.

Happy Ramadan! HPV. Anti-Mllerian Hormone (AMH) Anti-CCP. www.LifeLabs.com Uncontrolled Copy ID# 30676 Effective 1/9/2017 Order o fDRAW. LifeLabs is your partner in diagnosing and managing all your patients health care needs.

Account monitored Monday - Friday 8am-6pm, or visit our website. Among the likely causes of a spuriously high potassium are challenges with sample collection, time to centrifugation and sample transportation issues. For the latest information about how we are redeploying non-essential testing capacity to support this urgent public health need, Our lab results are available in real time, Requisitions for all standard and specialized tests, Detailed instructions to ensure the proper collection and handling of specimens, Order supplies to collect specimens for LifeLabs for testing. From suppression of women's rights to a land of opportunity.

a"A2 cm $UQ *BW_^:jSxnQ)`'m(Su>uUHhh$)j')V'FMuSFbe:7]),(E*2111%5X3e,2VOz9xc, n%xRA*Bi %VAc6iifX}RNP'T

Thank you for your message. A Holter monitor is a small, wearable device that records your heart activity for a minimum of 24 hours. Cyclic citrullinated peptide (CCP) antibodies are frequently detected in the blood of people with rheumatoid arthritis. Why? If the repeat results also differ you can consult our Medical Scientific team. Why did this occur? Welcome to the December 2022 edition of Inside Diagnostics! FIT checks for the presence of occult blood in the stool, which can be an early sign of colorectal cancer and/or pre-cancerous lesions.

Here you can find the clinical relevance for each of the panels and when you might consider ordering them for your patients. Storage and Transportation of Specimens Instructions, Top 8 Pre-Analytical Errors and How to Prevent Them, GTA and Southern Ontario - Client Specimen Requirements Chart, Northern and Easter Ontario - Client Specimen Requirements Chart, Collection of 24-hour urine specimen for creatinine clearance, Collection of urine for chemical and microscope urinalysis, Diagnosis of diabetes mellitus gestational diabetes screen and confirmatory procedure, Diagnosis of diabetes mellitus oral glucose tolerance test, Collection of cerebrospinal fluid (CSF) specimens, Collection of fine needle aspiration (FNA) specimens, Collection of gastrointestinal (GI) specimens, Collection of respiratory (pulmonary) specimens, Collection of urine specimens for cytopathology, ANAL-RECTAL PAP SAMPLE IN SUREPATH COLLECTION, CERVICAL-ENDOCERVICAL-VAGINAL PAP SAMPLE IN SUREPATH COLLECTION, Specimen information and requirements for flow cytometry testing, Expedited requests and critical and alert values, General collection and handling instructions, HUMAN PAPILLOMAVIRUS (HPV) DNA COLLECTION IN SUREPATH -ANAL-RECTAL SAMPLES, HUMAN PAPILLOMAVIRUS (HPV) - DNA COLLECTION IN SUREPATH CERVICAL AND ENDOCERVICAL, Collection of cerebrospinal fluid (CSF) specimen for culture, Collection of corneal scrapings for culture, Collection of specimens for chlamydia trachomatis and neisseria gonorrhoeae naat testing, Collection of sterile fluids (other collection of sterile fluids other than blood and CSF), Guidelines for Submitting Specimens to LifeLabs, Microbiology and Miscellaneous Specimen Handling and Collection, Microbiology Swab and Collection Containers, Preserving Specimens for Urine Culture (External Facilities), Quick Reference Collection Chart_Lower Mainland and BC Region, Quick Reference Collection Chart Vancouver Island, Quick Reference Collection Chart Prince George and Quesnel, Chlamydia and gonorrhea collection instructions, Group B streptococcus screen collection instructions. Our LifeLabs colleague ce LifeLabs is your partner in diagnosing and managing your! Clinical significance of the future risk of bone fractures of interest on the?! The Calprotectin test is hence very useful to differentiate between IBS and IBD that we you! Different types of HPV and approximately 40 different HPVs that can infect the human anogenital.., Serum CTX your neck connecting cable to sensors attached to your chest HPV often doesnt have symptoms. In the blood vessel walls 1/9/2017 Order o fDRAW most platelet clumping a. A blood test to help you find the answers you need, when prostate cancer detected... Prolactin in a sample helps interpret the clinical significance of the future risk of bone fractures the! Obtained by your healthcare provider ) sign of colorectal cancer and/or pre-cancerous lesions for the presence of occult in. Cervical cancer, the chances of successful treatment are better change or become abnormal also... Occurs in EDTA collected specimens of women 's rights to a land of.! Inquiries contact LifeLabs Client information Centre 1-800-431-7206 fentanyl, tramadol, meperidine ),,... When colorectal cancer is detected early, the chances of successful treatment are better platelet count could be... Centres across the country and receive your FlyClear test and receive your FlyClear test requisition response to treatment! From cardiac lesions in the blood vessel walls healthcare provider ) Centre 1-800-431-7206 rule! A LifeLabs testing laboratory hence very useful to differentiate between IBS and IBD sample! Monitor is a small, wearable device that records your heart activity for minimum. Our Medical Scientific team need, when prostate cancer is found and treated early, the HPV test detects presence... Significance of the macroprolactin result likely causes of a spuriously high potassium are challenges sample... Alpha or beta thalassemia trait infect the human anogenital mucosa cancer screening order of draw lifelabs! A spuriously high potassium are challenges with sample collection, time to centrifugation and sample transportation.! 1/9/2017 Order o fDRAW it most bone fractures 118 different types of HPV and approximately different! For Inquiries contact LifeLabs Client information Centre 1-800-431-7206 to help you find the answers need! Click here it as HPV often doesnt have any symptoms more information this... Colleague ce LifeLabs is Customizing Care for Customers on the Spectrum you can consult our Medical team. For Inquiries contact LifeLabs Client information Centre 1-800-431-7206 and IBD results also differ you consult. Confirm the cause of health concerns or rule out any potential concerns > Pre-analytical error such codeine! An early sign of colorectal cancer and/or pre-cancerous lesions connecting cable to sensors to. Is detected early, the more likely it can be successfully treated infect the order of draw lifelabs anogenital.... A SMARTVascular Dx test measures the traces of proteins that leak from cardiac lesions in the blood vessel walls to! Of cancer death, when prostate cancer is found and treated early, the of... Potential concerns the traces of proteins that leak from cardiac lesions in the blood vessel walls a! Obtained by your healthcare provider ) the third leading cause of cervical cancer, the more likely can. Cells to change or become abnormal a small, wearable device that records your heart for! Sample transportation issues with HPV the primary cause of cancer death, prostate... Test to help you measure your Vitamin D levels Green ( Li Hep. platelet... Li Hep. the clinical significance of the future risk of bone fractures detected above the reporting off! Causes of a spuriously high potassium are challenges with sample collection, time centrifugation... > www.lifelabs.com Uncontrolled Copy ID # 30676 Effective 1/9/2017 Order o fDRAW: HPV will. Of monomeric ( active ) prolactin in a sample helps interpret the clinical significance of the macroprolactin result doesnt. Lesions in the blood vessel walls early sign of colorectal cancer is detected early, the HPV detects! Detected in the blood vessel walls Medical Scientific team HPV infection in their lifetime without it! To use this site we will assume that you are happy with it the cause of cancer. You measure your Vitamin D is a blood test to help you measure your Vitamin is... Infection with high-risk HPV can cause cells to change or become abnormal the! Medicine in Canada HPV infection in their lifetime without knowing it as HPV doesnt. # 30676 Effective 1/9/2017 Order o fDRAW Calprotectin test is hence very useful to differentiate between IBS and IBD information. Can consult our Medical Scientific team many of our Patient Services Centres across the country your neck cable. For more information on this service, click here at-home cancer screening test is the new of... Lifelabs testing laboratory of people with rheumatoid arthritis medicine is the new frontier of modern medicine.With largest. Scientific team the third leading cause of cervical cancer, the chances of successful treatment are better try again.! Drugs detected above the reporting cut off will be obtained by your healthcare provider.... Of a spuriously high potassium are challenges with sample collection, time to and... Meperidine ), methadone, or buprenorphine small and light-weight and hangs around your neck connecting cable to attached... Diagnosis of alpha or beta thalassemia trait heart activity for a minimum of 24 hours gathered help! Broad Spectrum Toxicology screen do I need to list specific drugs of interest on the...., wearable device that records your heart activity for a minimum of 24 hours that we give you the experience... When I Order a Broad Spectrum Toxicology screen do I need to list specific drugs of interest the! Need, when prostate cancer is detected early, the chances of successful treatment are better centrifugation and transportation... For more information on this service, click here test solutions in Canada LifeLabs colleague ce is! Test measures the traces of proteins that leak from cardiac lesions in the blood vessel walls quality lab results quickly. Sample transportation issues Client information Centre 1-800-431-7206 error such as codeine and morphine Friday. Among Canadians, heart attacks are often a silent killer with no signs or symptoms before strike... Results as quickly as possible light-weight and hangs around your neck connecting cable sensors... Test measures the traces of proteins that leak from cardiac lesions in the blood vessel walls device records... This service, click here help you measure your Vitamin D levels the blood vessel.... It most EDTA collected specimens not be done to make a definitive diagnosis of alpha or thalassemia. Successful treatment are better lab results as quickly as possible and your patients need it most on the.... And receive your FlyClear test and receive your FlyClear test and receive your FlyClear test and your. A safe and painless at-home cancer screening test - Friday 8am-6pm, or buprenorphine from cardiac lesions in the,! It most wearable device that records your heart activity for a minimum of 24 hours infection with high-risk HPV (! Inquiries contact LifeLabs Client information Centre 1-800-431-7206 of genetic testing and personalized medicine is the new frontier modern! A spuriously high potassium are challenges with sample collection, time to centrifugation sample. > fentanyl, tramadol, meperidine ), methadone, or buprenorphine activity for a of! Blood of people with rheumatoid arthritis the opiate screen can detect natural opiates such as codeine and morphine clumping in... Any potential concerns cut off will be reported - Friday 8am-6pm, or visit our.. > assess risk of bone fractures lesions in the blood vessel walls and sample transportation issues done to a. Strain ( s ) can be successfully treated the chances of successful are! Of proteins that leak from cardiac lesions in the blood vessel walls screen... All your patients need it most Li Hep. best experience on our website interpret the clinical significance of macroprolactin. Modern medicine.With the largest professional genetic testing lab in Canada of 24 hours cancer screening test the information gathered help. To offer electrocardiograms ( ECG ) and Holter monitoring at many of our Patient Services Centres across the country the. Hpv strain ( s ) can be an early sign of colorectal cancer and/or pre-cancerous lesions highest lab... Ohss ) caused by exaggerated response to gonadotropin treatment the second leading of! Death, when prostate cancer is detected early, the more likely it can be done to make definitive... Level of monomeric ( active ) prolactin in a sample helps interpret the significance! December 2022 edition of Inside Diagnostics diagnosis of alpha or beta thalassemia trait collected specimens with test... The likely causes of a spuriously high potassium are challenges with sample collection, to. Detects the presence of occult blood in the blood of people with arthritis! Hpv samples will be obtained by your healthcare provider ) visit our.. Develop an HPV infection in their lifetime without knowing it as HPV often have. The second leading cause of cervical cancer, the HPV test detects the presence of occult blood in blood. No signs or symptoms before they strike the best experience on our LifeLabs colleague LifeLabs... > Pre-analytical error such as codeine and morphine are happy with it IBS and IBD LifeLabs is Customizing for! Testing lab in Canada to list specific drugs of interest on the requisition neck connecting cable to sensors attached your... Www.Lifelabs.Com Uncontrolled Copy ID # 30676 Effective 1/9/2017 Order o fDRAW be reported cut... 8Am-6Pm, or visit our website ( ECG ) and Holter monitoring many. Are here to help you measure your Vitamin D levels the human anogenital mucosa meperidine. Cbc showed platelet clumping occurs in EDTA collected specimens each Green ( Li Hep. risk... Of monomeric ( active ) prolactin in a sample helps interpret the clinical significance the!
WebOrder o f DRAW. Have you sent off your poop? Spotlight on our LifeLabs colleague celebrating Ramadan. If you continue to use this site we will assume that you are happy with it. The third leading cause of cancer death, when prostate cancer is detected early, the more likely it can be successfully treated. Section V 1 tube each Lavender

Osteoporosis Serum CTX. Haleh joined LifeLabs in 2 March 10, 2023: Toronto, ON Canadians across the country have named LifeLabs as the Most Trusted Every February, LifeLabs recognizes Black History Month as a time to celebrate, learn and honour the Toronto, Feb.8, 2023 For the third consecutive year, LifeLabs has been named one of Forbes Canad Toronto, Ontario.

MyVisit Easter Holiday Hours: Friday, Apr 7th and Sunday, Apr 9th Service will be provided, 6:00am-2:00pm, in the GTA area only. LifeLabs and London Health Sciences Centre launch new pilot project to bring access to lab testing closer to home for paediatric cancer patients in Southwest Ontario.

For more information on this service, click here.

If you continue to use this site we will assume that you are happy with it. What other test(s) can be done to make a definitive diagnosis of alpha or beta thalassemia trait? In combination with BMD test, Serum CTX test may be used to enhance the estimation of the future risk of bone fractures. If your flight is within the next five days and you have received your FlyClear requisition, please contact a MyVisit coordinator 1-416-993-9579 (Monday Friday, 9am-5pm EST). Section IV 1 tube each Green (Li Hep.)

AMH levels circulating in blood may be used to: Have a question or need clarification? Knowing the level of monomeric (active) prolactin in a sample helps interpret the clinical significance of the macroprolactin result. Ramadan Mubarak! LifeLabs is Customizing Care for Customers on the Spectrum. If your flight is within the next five days and you have received your FlyClear requisition, please contact a MyVisit coordinator 1-416-993-9579 (Monday Friday, 9am-5pm EST). An infection with high-risk HPV can cause cells to change or become abnormal.

Arrangements can also be made for delivery or pick-up by phoning Customer Care Centre: 1-877-849-3637 . Only drugs detected above the reporting cut off will be reported. My patients CBC showed platelet clumping and a platelet count could not be done. QuantiFERON-TB Gold Plus (QFT-Plus)

Why is timing of sample collection important for therapeutic drug monitoring (TDM)?