The effects of different sampling techniques on peripheral post mortem tryptase levels: a recommended sampling method

Different sampling techniques can impact on post mortem tryptase levels. A previous study demonstrated significantly lower femoral post mortem total tryptase levels in samples collected via transcutaneous aspiration compared with directly sampling during internal examination. However, an outlier wit...

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Veröffentlicht in:International journal of legal medicine 2019-09, Vol.133 (5), p.1477-1483
Hauptverfasser: Garland, J., Philcox, W., McCarthy, S., Hensby-Bennet, S., Ondruschka, B., Woydt, L., Da Broi, U., Palmiere, C., Lam, L., Ahn, Y., Kesha, K., Stables, S., Tse, R.
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container_issue 5
container_start_page 1477
container_title International journal of legal medicine
container_volume 133
creator Garland, J.
Philcox, W.
McCarthy, S.
Hensby-Bennet, S.
Ondruschka, B.
Woydt, L.
Da Broi, U.
Palmiere, C.
Lam, L.
Ahn, Y.
Kesha, K.
Stables, S.
Tse, R.
description Different sampling techniques can impact on post mortem tryptase levels. A previous study demonstrated significantly lower femoral post mortem total tryptase levels in samples collected via transcutaneous aspiration compared with directly sampling during internal examination. However, an outlier with high tryptase level was noted in one transcutaneous aspiration sample. This 6-month prospective study compared total post mortem tryptase levels between 21 paired aspirated venous and arterial femoral blood samples, and 19 paired aspirated and cutdown femoral venous blood samples in non-anaphylactic deaths only. No statistical differences were demonstrated between the different sampling methods. However, four outlier cases with higher tryptase levels in aspirated arterial and femoral cutdown samples compared with aspirated venous femoral samples were noted. The reasons for the outliers may be due to the bloods collected from these two methods being contaminated by central arterial and venous blood with high tryptase levels respectively. None of the aspirated venous femoral post mortem tryptase levels were above recognized post mortem tryptase cutoff to diagnose anaphylaxis. This study recommends aspirating blood samples from a clamped femoral/external iliac vein for post mortem tryptase analysis should be defined as the gold standard. Further study using the recommended sampling method on post mortem tryptase levels in non-anaphylactic and anaphylactic cases is warranted.
doi_str_mv 10.1007/s00414-019-02038-9
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source MEDLINE; HeinOnline Law Journal Library; SpringerLink Journals - AutoHoldings
subjects Adult
Aged
Aged, 80 and over
Anaphylaxis
Autopsy - methods
Blood
Blood Specimen Collection - methods
Constriction
Female
Femoral Artery
Femoral Vein
Forensic Medicine
Forensic pathology
Forensic Pathology - methods
Humans
Male
Medical Law
Medicine & Public Health
Method Paper
Middle Aged
Outliers (statistics)
Prospective Studies
Sampling methods
Sampling techniques
Statistical methods
Tryptases - blood
Young Adult
title The effects of different sampling techniques on peripheral post mortem tryptase levels: a recommended sampling method
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