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Capillary blood analysis

In blood, we trace broadly and specifically, it is an optimal liquid to detect and trace drugs and medicines in. We see both the parent substance and metabolites and it cannot be manipulated.

Laboratory analysis

Capillary blood analysis
Capillary blood analysis

Impossible to manipulate

Best for tracking e.g. PEth and THC

Legally sustainable results within 1 week

Fast and efficient sampling

Static pH value

Impossible to manipulate the sample

The blood's perfect pH value

Blood is the most optimal liquid to detect and track pharmaceuticals and drugs in thanks to its constant pH value. Human blood has a pH value that is only disturbed under extreme conditions, and since medicines and drugs are dependent on the pH value, blood is the perfect liquid for drug testing. The notion that urine would be the very best liquid to trace THC in is therefore incorrect.

Blood is the most optimal liquid to detect and track pharmaceuticals and drugs in thanks to its constant pH value.

The difference between venous and capillary analyses

Venous sample

Ett venöst blodprov tar du i armvecket. Ett sådant blodprov ger en större mängd blod, vilket alltid är en fördel när vätskan ska analyseras. När du vill göra en TDM (terapeutisk drogmonitorering) behöver provet alltid vara taget venöst. Venös provtagning kräver medicinsk utbildning och särskild hantering. I de fall venös provtagning inte är lämpligt för din klient rekommenderar vi därför i stället kapillär provtagning.

Capillary sample

You take a capillary blood sample in your finger. This method produces slightly less blood, but has advantages such as speed and that sampling does not require the same medical expertise. Benefits that in some situations may be worth more than the amount of blood. In addition, capillary sampling eliminates the risk of ethanol forming in the blood sample after the sample is taken, which can sometimes lead to falsely detected values. If you intend to order an analysis of, for example, PEth, you should always take the blood sample capillary for that very reason.

What's Best for Tracking Cannabis?

Cannabis (THC) is still by far the most common narcotic preparation.
So how do you best track it? Below is a summary of how you can think when you send to our laboratory (since we have significantly lower limit values than Swedish laboratories, it is not possible to make a general comparison).

What's Best for Tracking Cannabis?

THC - Urine test

THC is stored in the fatty tissue, which means that someone who has had a long-term addiction will test positive for THC in a urine test for several weeks, if not months, after they stop taking the drug. To check that there is no new intake during that period, you need to send to a lab and get a quota (compensates for dilution).

THC - Saliva Sample

THC is usually tracked for up to 24 hours as it is physical residues in the oral cavity that are detected. In some cases, small traces of THC can remain in the oral cavity for more than 24 hours, which can give a detection time of about 2-3 days. Here, blood is the absolute best option to follow THC tapering. The advantage is that you avoid the long trailing values that occur with urine samples, but the disadvantage is that you have a very narrow range during which it is possible to track intake. The more the test taker has eaten, drunk and brushed their teeth, the shorter the trace time.

THC - Capillary sample

In a capillary blood test, we track THC for about 3 days in case of single intake and up to a few weeks in case of extensive abuse. This makes blood the optimal choice for tracking THC in particular. Depending on which metabolites are present in the sample, it is also possible to rule out or establish whether or not smoking took place recently.

Why take a capillary sample instead of urine or saliva?

Urine samples have long been considered "the golden standard" in drug analysis - something that is actually quite strange. When we compare urine, saliva and blood, urine is in many cases the worst choice.

The reason why urine has been and still is the obvious choice for many is because historically you could only analyze drugs reliably in urine and rapid tests for urine are still superior to those in saliva. However, the picture becomes different when we look at what we can do in urine and saliva and blood in the laboratory.

Blood has three very big advantages over urine:

Blood cannot be manipulated
Because urine samples have been the standard for so many years, entire businesses have been built up focusing on selling drug-free urine as well as loose penises and other aids - all to hide drug use. Considering that companies can get around this, you understand that it is a widespread phenomenon. Saliva samples, on the other hand, are difficult to manipulate and blood cannot be manipulated.

Blood cannot be diluted
How concentrated the urine is varies between each sampling occasion, depending on how much fluid the sample provider has ingested. Therefore, the drug concentration can vary greatly if on one occasion you have a very concentrated urine and on another occasion you have a more diluted urine. Blood is largely static and the drug concentration only increases or decreases in step with drug intake.

Blood has a static pH value
The pH value of urine samples varies a lot, which directly affects the possibility of detecting certain drugs (for example, methadone, heroin and amphetamines). The pH value also varies both from day to day and from person to person, which makes it extra tricky to analyze in urine. The pH value, on the other hand, is relatively static in saliva and completely static in blood.

Searchable cross-reactions

Rapid tests done in urine samples can give positive results for certain drugs even if the person has not taken the drug in question in its pure form. This is due to cross-reactions that occur when the test's antibodies react with a medication the person is taking. All known cross-reactions are documented and available for you to search.

For cross-reactions

Searchable cross-reactions
This is how limit values work

The limit value is the minimum concentration of a drug that a test or analysis can detect. The lower the concentration of a drug an analysis can read from a sample, the lower the limit value of the analysis.

Our tests are designed to optimize drug discovery while excluding false positives.

More about limit values

This is how limit values work
Our forensic laboratory

For the analysis of samples, we have been cooperating for many years with the accredited forensic laboratory MVZ Labor Dessau Kassel GmbH in Germany.

MVZ Labor Dessau belongs to the absolute top tier among European laboratories and as a partner we are the exclusive distributor and dealer in Sweden and Scandinavia.

Our forensic laboratory 
We perform these analyses:

In capillary blood, we can analyze the vast majority of drugs and medicines.

Due to its constant pH value, blood is the optimal liquid to trace both drugs and pharmaceuticals in.

If you want to trace widely and trace THC with optimal trace time, our multi-assay in capillary blood is the best option. You get answers to 80 substances, no long lag values for THC as in urine and you get a significantly longer trace time for THC than in saliva (saliva max 24h). Even when you want to test for synthetic cannabinoids like Spice, blood - or saliva - is your absolute most reliable method of analysis.

When tracing PEth, you should always choose capillary whole blood. Why?

For two reasons:

1. PEth is in the red blood cell and should be taken in whole blood - so preferably capillary.

2. Alcohol can build up in a venous sample and lead to a falsely elevated value.

From the National Board of Health and Welfare's website:

“….PEth can form in the blood sample after sampling, if the sample contains ethanol and is stored incorrectly. This may mean a risk of false positive identification of alcohol consumption. "

However, what we cannot do in capillary whole blood is separation of D/L-amphetamine, because saliva or urine is required.

Our blood tests

Multianalysis

About 80 substances including stated concentration for THC and metabolites

Big amphetamine analysis

About 80 pcs including cathinones and nets, designer drugs

Large Benzodiazepine Analysis

About 70 pcs including Z-drugs and nets, designer drugs

Large opiate/opioid analysis

About 70 including other painkillers and net, designer drugs

Spice

More than 100 different ones

Ph.D

Alcohol marker (over time)

EtG

Alcohol marker (recent intake)

The forensic laboratory MVZ Labor Dessau outside Berlin in Germany belongs to the absolute top tier in saliva analysis i

Our laboratory

The forensic laboratory MVZ Labor Dessau outside Berlin in Germany belongs to the absolute top tier in saliva analysis in Europe. By cooperating with them, we can offer broad analyses, low limit values and legally valid answers from saliva samples. The collaboration makes us at Prodia a leader in saliva analysis on the Nordic market.

For many years, the laboratory has been fully accredited by German Dakks, with which Swedish Swedac has an agreement. The agreement is a so-called MLA agreement. This means that analyzes from MVZ Labor Dessau provide legally sustainable results that can, for example, be used as evidence in trials also in Sweden.

Prodia Blood Analysis

How is a capillary sample taken?

This is how easy it is to take a test
Blood analysis

Blood

In a capillary blood test, we track THC for about 3 days in case of single intake and up to 1-2 weeks in case of extensive abuse. This makes blood the optimal choice for tracking precisely THC. Depending on which metabolites are present in the sample, it is also possible to rule out or establish whether or not smoking took place recently.

Saliva analysis

Saliva

I saliv spårar vi THC max 24 h. Fördelen är att du undviker de långa släpvärden som uppstår med urinprov, men nackdelen är att du har ett väldigt snävt intervall under vilket det är
möjligt att spåra intag. Ju mer provlämnaren har ätit, druckit och borstat tänderna desto kortare spårtid.

Urinalysis

Urine

THC is stored in the fatty tissue, which means that someone who has had a long-term addiction will test positive for THC in a urine test for several weeks, if not months, after they stop taking the drug. To check that there is no new intake during that period, you need to send to a lab and get a quota (compensates for dilution).

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