Identification of High-Risk Lower Extremity Wounds Using Point-of-Care Test for Bacterial Protease Activity; A Single-Centre, Single-Blinded, Prospective Study
Clinician observation is the mainstay to determine if wound infection is present, and focuses on presence of erythema, purulence, and odour. However, non-visible bacterial protease activity can delay wound healing and lead to complications. In this study, a point-of-care test to detect the presence...
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Veröffentlicht in: | International journal of lower extremity wounds 2024-09, p.15347346241284804 |
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creator | Jonker, Leon Todhunter, Jane Mutch, Rachel Lowes, Donna Messenger, Grace |
description | Clinician observation is the mainstay to determine if wound infection is present, and focuses on presence of erythema, purulence, and odour. However, non-visible bacterial protease activity can delay wound healing and lead to complications. In this study, a point-of-care test to detect the presence of bacterial protease activity (BPA, tested with Woundchek Bacterial Status test) was appraised. A total of 130 patients with lower extremity wounds were recruited in vascular and podiatry clinics, and across two time-points 182 BPA tests were conducted subsequent to initial (blinded) clinician's wound appraisal. Clinical opinion ('no infection', 'possible' or 'definite' infection) and BPA result (negative or positive test) had a moderate Kendall's tau-c rank correlation coefficient of 0.32 ( |
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< 0.001). Binary logistic regression analysis and principal component analysis showed that infection determined by clinical opinion was significantly associated with abovementioned clinical signs and a positive BPA test. However, a positive BPA result was also significantly linked with wound severity, such as number of lesions, chronicity and size. Throughout a 12-week follow-up period, median ulcer size was larger for wounds positive for BPA test at baseline (
0.001) and week-12 (
0.036; both Mann-Whitney U-test) respectively. As a pilot initiative, clinical staff were allowed to act on the BPA result if they wished; in 11 out of 71 test-positive cases (15%) this happened and antimicrobial dressing was applied instead of planned standard dressing. These results show that protease-releasing bacteria may be active in ulcers that do not (yet) exhibit hallmark signs of infection, and are associated with delayed healing. Targeted point-of-care testing for bacterial protease activity may have the potential to identify and enable pro-active (antimicrobial) management of these high-risk wounds.</description><identifier>ISSN: 1534-7346</identifier><identifier>ISSN: 1552-6941</identifier><identifier>EISSN: 1552-6941</identifier><identifier>DOI: 10.1177/15347346241284804</identifier><identifier>PMID: 39275845</identifier><language>eng</language><publisher>United States</publisher><ispartof>International journal of lower extremity wounds, 2024-09, p.15347346241284804</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c183t-be30e5b242e28f58ad630c9f8deafa82a5f293cdaca9f165e3cc933fab1e1caa3</cites><orcidid>0000-0001-5867-4663</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,781,785,27929,27930</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/39275845$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Jonker, Leon</creatorcontrib><creatorcontrib>Todhunter, Jane</creatorcontrib><creatorcontrib>Mutch, Rachel</creatorcontrib><creatorcontrib>Lowes, Donna</creatorcontrib><creatorcontrib>Messenger, Grace</creatorcontrib><title>Identification of High-Risk Lower Extremity Wounds Using Point-of-Care Test for Bacterial Protease Activity; A Single-Centre, Single-Blinded, Prospective Study</title><title>International journal of lower extremity wounds</title><addtitle>Int J Low Extrem Wounds</addtitle><description>Clinician observation is the mainstay to determine if wound infection is present, and focuses on presence of erythema, purulence, and odour. However, non-visible bacterial protease activity can delay wound healing and lead to complications. In this study, a point-of-care test to detect the presence of bacterial protease activity (BPA, tested with Woundchek Bacterial Status test) was appraised. A total of 130 patients with lower extremity wounds were recruited in vascular and podiatry clinics, and across two time-points 182 BPA tests were conducted subsequent to initial (blinded) clinician's wound appraisal. Clinical opinion ('no infection', 'possible' or 'definite' infection) and BPA result (negative or positive test) had a moderate Kendall's tau-c rank correlation coefficient of 0.32 (
< 0.001). Binary logistic regression analysis and principal component analysis showed that infection determined by clinical opinion was significantly associated with abovementioned clinical signs and a positive BPA test. However, a positive BPA result was also significantly linked with wound severity, such as number of lesions, chronicity and size. Throughout a 12-week follow-up period, median ulcer size was larger for wounds positive for BPA test at baseline (
0.001) and week-12 (
0.036; both Mann-Whitney U-test) respectively. As a pilot initiative, clinical staff were allowed to act on the BPA result if they wished; in 11 out of 71 test-positive cases (15%) this happened and antimicrobial dressing was applied instead of planned standard dressing. These results show that protease-releasing bacteria may be active in ulcers that do not (yet) exhibit hallmark signs of infection, and are associated with delayed healing. Targeted point-of-care testing for bacterial protease activity may have the potential to identify and enable pro-active (antimicrobial) management of these high-risk wounds.</description><issn>1534-7346</issn><issn>1552-6941</issn><issn>1552-6941</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><recordid>eNplkctuFDEQRS0EIg_4ADbISxYx-DntFqvJKCSRRiIiiVi2auxyMPS0J7YbmK_hV-lWEjasqkq651aVLiFvBH8vRNN8EEbpRumF1EJabbl-Rg6FMZItWi2ez73SbBYckKNSvnMuBW-bl-RAtbIxVptD8ufS41BjiA5qTANNgV7Eu2_sSyw_6Dr9wkzPfteM21j39GsaB1_obYnDHb1KcagsBbaCjPQGS6UhZXoKrmKO0NOrnCpCQbp0Nf6c-I90Sa8ntEe2mpZmPHkaT_s4ePQnM1N2OOuRXtfR71-RFwH6gq8f6zG5_XR2s7pg68_nl6vlmjlhVWUbVBzNRmqJ0gZjwS8Ud22wHiGAlWCCbJXz4KANYmFQOdcqFWAjUDgAdUzePfjucrofp2e6bSwO-x4GTGPplODailZZOUnFg9RNx5aModvluIW87wTv5ly6_3KZmLeP9uNmi_4f8RSE-gsG4YsP</recordid><startdate>20240913</startdate><enddate>20240913</enddate><creator>Jonker, Leon</creator><creator>Todhunter, Jane</creator><creator>Mutch, Rachel</creator><creator>Lowes, Donna</creator><creator>Messenger, Grace</creator><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><orcidid>https://orcid.org/0000-0001-5867-4663</orcidid></search><sort><creationdate>20240913</creationdate><title>Identification of High-Risk Lower Extremity Wounds Using Point-of-Care Test for Bacterial Protease Activity; A Single-Centre, Single-Blinded, Prospective Study</title><author>Jonker, Leon ; Todhunter, Jane ; Mutch, Rachel ; Lowes, Donna ; Messenger, Grace</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c183t-be30e5b242e28f58ad630c9f8deafa82a5f293cdaca9f165e3cc933fab1e1caa3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2024</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Jonker, Leon</creatorcontrib><creatorcontrib>Todhunter, Jane</creatorcontrib><creatorcontrib>Mutch, Rachel</creatorcontrib><creatorcontrib>Lowes, Donna</creatorcontrib><creatorcontrib>Messenger, Grace</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>International journal of lower extremity wounds</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Jonker, Leon</au><au>Todhunter, Jane</au><au>Mutch, Rachel</au><au>Lowes, Donna</au><au>Messenger, Grace</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Identification of High-Risk Lower Extremity Wounds Using Point-of-Care Test for Bacterial Protease Activity; A Single-Centre, Single-Blinded, Prospective Study</atitle><jtitle>International journal of lower extremity wounds</jtitle><addtitle>Int J Low Extrem Wounds</addtitle><date>2024-09-13</date><risdate>2024</risdate><spage>15347346241284804</spage><pages>15347346241284804-</pages><issn>1534-7346</issn><issn>1552-6941</issn><eissn>1552-6941</eissn><abstract>Clinician observation is the mainstay to determine if wound infection is present, and focuses on presence of erythema, purulence, and odour. However, non-visible bacterial protease activity can delay wound healing and lead to complications. In this study, a point-of-care test to detect the presence of bacterial protease activity (BPA, tested with Woundchek Bacterial Status test) was appraised. A total of 130 patients with lower extremity wounds were recruited in vascular and podiatry clinics, and across two time-points 182 BPA tests were conducted subsequent to initial (blinded) clinician's wound appraisal. Clinical opinion ('no infection', 'possible' or 'definite' infection) and BPA result (negative or positive test) had a moderate Kendall's tau-c rank correlation coefficient of 0.32 (
< 0.001). Binary logistic regression analysis and principal component analysis showed that infection determined by clinical opinion was significantly associated with abovementioned clinical signs and a positive BPA test. However, a positive BPA result was also significantly linked with wound severity, such as number of lesions, chronicity and size. Throughout a 12-week follow-up period, median ulcer size was larger for wounds positive for BPA test at baseline (
0.001) and week-12 (
0.036; both Mann-Whitney U-test) respectively. As a pilot initiative, clinical staff were allowed to act on the BPA result if they wished; in 11 out of 71 test-positive cases (15%) this happened and antimicrobial dressing was applied instead of planned standard dressing. These results show that protease-releasing bacteria may be active in ulcers that do not (yet) exhibit hallmark signs of infection, and are associated with delayed healing. Targeted point-of-care testing for bacterial protease activity may have the potential to identify and enable pro-active (antimicrobial) management of these high-risk wounds.</abstract><cop>United States</cop><pmid>39275845</pmid><doi>10.1177/15347346241284804</doi><orcidid>https://orcid.org/0000-0001-5867-4663</orcidid></addata></record> |
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title | Identification of High-Risk Lower Extremity Wounds Using Point-of-Care Test for Bacterial Protease Activity; A Single-Centre, Single-Blinded, Prospective Study |
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