Quantification of Intraoperative Blood Loss in a Simulated Scenario Using a Novel Device.
Journal
Shock (Augusta, Ga.)
ISSN: 1540-0514
Titre abrégé: Shock
Pays: United States
ID NLM: 9421564
Informations de publication
Date de publication:
01 06 2021
01 06 2021
Historique:
pubmed:
23
7
2020
medline:
20
1
2022
entrez:
23
7
2020
Statut:
ppublish
Résumé
Particularly for protracted bleeding situations, the realization of a relevant blood loss is necessary for early initiation of therapy to avoid hemodynamic instability and shock. The frequently used visual assessment of blood loss is known to be incorrect. An innovative option to address this problem is a mobile application using colorimetric image correction and analysis. The objective of this study was to evaluate the clinical applicability and accuracy of a novel mobile device application using colorimetric image correction and analysis for blood loss estimation. Scenarios of blood-filled surgical sponges were created to evaluate the accuracy of colorimetric-based blood loss estimation and visual and gravimetric blood loss estimation. Fifty-three anesthesiologists ran through the scenarios. The estimated blood loss correlated the least with the reference blood loss in the visual technique (Rho: 0.52; P < 3.7×10-16), followed by the gravimetric technique (Rho: 0.73; P = 2.8×10-05). The best correlation was found in the colorimetric blood loss measurement (Rho: 0.77; P = 3.53×10-06). A median overestimation per scenario of 133.0 mL (interquartile range [IQR] 33.0 mL-283.0 mL) was observed when using the visual method, whereas 32.5 mL (IQR 10.8 mL-44.0 mL) was overestimated with the gravimetric method and 31 mL (IQR 17.0 mL-42.8 mL) with the colorimetric method. Especially in the case of blood loss underestimation, the application has the least deviation from the reference. The blood loss measured in the sponges correlated strong with the reference blood loss, showing the smallest median overestimation and the smallest deviation in underestimation. The visual estimation shows serious errors, where the gravimetric method is prone to errors, especially in dilution. The colorimetric method offers an easily implementable possibility to monitor blood loss in real time and to initiate early diagnostic and therapeutic measures in case of persistent blood loss. The influence of real-time estimation of colorimetric blood loss on transfusion decisions should be the subject of future studies.
Sections du résumé
BACKGROUND
Particularly for protracted bleeding situations, the realization of a relevant blood loss is necessary for early initiation of therapy to avoid hemodynamic instability and shock. The frequently used visual assessment of blood loss is known to be incorrect. An innovative option to address this problem is a mobile application using colorimetric image correction and analysis.
METHODS
The objective of this study was to evaluate the clinical applicability and accuracy of a novel mobile device application using colorimetric image correction and analysis for blood loss estimation. Scenarios of blood-filled surgical sponges were created to evaluate the accuracy of colorimetric-based blood loss estimation and visual and gravimetric blood loss estimation.
RESULTS
Fifty-three anesthesiologists ran through the scenarios. The estimated blood loss correlated the least with the reference blood loss in the visual technique (Rho: 0.52; P < 3.7×10-16), followed by the gravimetric technique (Rho: 0.73; P = 2.8×10-05). The best correlation was found in the colorimetric blood loss measurement (Rho: 0.77; P = 3.53×10-06). A median overestimation per scenario of 133.0 mL (interquartile range [IQR] 33.0 mL-283.0 mL) was observed when using the visual method, whereas 32.5 mL (IQR 10.8 mL-44.0 mL) was overestimated with the gravimetric method and 31 mL (IQR 17.0 mL-42.8 mL) with the colorimetric method. Especially in the case of blood loss underestimation, the application has the least deviation from the reference.
CONCLUSION
The blood loss measured in the sponges correlated strong with the reference blood loss, showing the smallest median overestimation and the smallest deviation in underestimation. The visual estimation shows serious errors, where the gravimetric method is prone to errors, especially in dilution. The colorimetric method offers an easily implementable possibility to monitor blood loss in real time and to initiate early diagnostic and therapeutic measures in case of persistent blood loss. The influence of real-time estimation of colorimetric blood loss on transfusion decisions should be the subject of future studies.
Identifiants
pubmed: 32694398
pii: 00024382-202106000-00007
doi: 10.1097/SHK.0000000000001615
doi:
Banques de données
ClinicalTrials.gov
['NCT04245995']
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
759-765Informations de copyright
Copyright © 2020 by the Shock Society.
Déclaration de conflit d'intérêts
The authors report no conflicts of interest.
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