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Sentinel clot sign

Last revised by Khalid Alhusseiny on 12 May 2023

Citation, DOI, disclosures and article data

Citation:

Niknejad M, Alhusseiny K, Anan R, et al. Sentinel clot sign. Reference article, Radiopaedia.org (Accessed on 06 Oct 2024) https://doi.org/10.53347/rID-21489

DOI:

https://doi.org/10.53347/rID-21489

Permalink:

https://radiopaedia.org/articles/21489

rID:

21489

Article created:

26 Jan 2013, Mohammad Taghi Niknejad ◉

Disclosures:

At the time the article was created Mohammad Taghi Niknejad had no recorded disclosures.

View Mohammad Taghi Niknejad's current disclosures

Last revised:

12 May 2023, Khalid Alhusseiny ◉

Disclosures:

At the time the article was last revised Khalid Alhusseiny had no financial relationships to ineligible companies to disclose.

View Khalid Alhusseiny's current disclosures

Revisions:

11 times, by 11 contributors - see full revision history and disclosures

Systems:

Vascular

Sections:

Signs

Tags:

cases, refs

Synonyms:

Sentinel clot
Sentinel clot sign in CT
Sentinel clot sign on CT

The sentinel clot sign is a useful CT finding for the evaluation of probable anatomic sites of hemorrhage.

On CT, acute clotted hemorrhage typically has high attenuation (45 to 70 HU), whereas surrounding areas of acute non-clotted hemorrhage or more chronic hemorrhage have either lower attenuation (30 to 45 HU) or fluid attenuation (0 to 10 HU).

This is the basis for the sentinel clot sign, areas of higher attenuation are likely to represent more acute clotted hemorrhage, and are therefore more likely to indicate the anatomic sites of hemorrhage.

Radiographic features

CT

On CT clotted blood has increased attenuation value as compared to non clotted blood. It is primarily used in patients of trauma and circumstances of non-traumatic hemoperitoneum ⁴.

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