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Vaginal fluid interleukin-6 concentrations as a point-of-care test is of value in women with pretermprelabor rupture of membranes
American journal of obstetrics and gynecology, 2016, Vol.215 (5)
Musilova, I.
Bestvina, T.
Hudeckova, M.
Michalec, I.
Cobo, T.
Jacobsson, Bo
Kacerovsky, M.
2016
Details
Autor(en) / Beteiligte
Musilova, I.
Bestvina, T.
Hudeckova, M.
Michalec, I.
Cobo, T.
Jacobsson, Bo
Kacerovsky, M.
Titel
Vaginal fluid interleukin-6 concentrations as a point-of-care test is of value in women with pretermprelabor rupture of membranes
Ist Teil von
American journal of obstetrics and gynecology, 2016, Vol.215 (5)
Erscheinungsjahr
2016
Link zum Volltext
Quelle
Elsevier ScienceDirect Journals Complete
Beschreibungen/Notizen
Background Preterm prelabor rupture of membranes is frequently complicated/accompanied by infection and inflammation in the amniotic cavity. A point-of-care determination of amniotic fluid interleukin-6 has been shown to be a potentially clinically useful approach to assess inflammatory status of the amniotic cavity. Amniocentesis in preterm prelabor rupture of membranes is not broadly used in clinical practice, and therefore, a shift toward a noninvasive amniotic fluid sampling method is needed. Objective The first aim of this study was to evaluate the association between the point-of-care vaginal and amniotic fluid interleukin-6 concentrations in fresh unprocessed samples obtained simultaneously. The second goal was to determine the diagnostic indices and predictive value of the point-of-care assessment of vaginal fluid interleukin-6 concentration in the identification of microbial invasion of the amniotic cavity, intraamniotic inflammation, and microbial-associated intraamniotic inflammation in patients with preterm prelabor rupture of membranes. Study Design A prospective cohort study was conducted in women with singleton gestation complicated by preterm prelabor rupture of membranes at between 24+0 and 36+6 weeks. A total of 153 women with singleton pregnancies were included in this study. Vaginal fluid was obtained from the posterior vaginal fornix by aspiration with a sterile urine sample tube with a suction tip. Amniotic fluid was obtained by transabdominal amniocentesis. Interleukin-6 concentrations were assessed with a lateral flow immunoassay in both fluids immediately after sampling. Microbial invasion of the amniotic cavity was determined based on a positive polymerase chain reaction analysis. Intraamniotic inflammation was defined as an amniotic fluid point-of-care interleukin-6 concentration ≥745 pg/mL. Results Several results were obtained in this study. First, it was possible to perform the point-of-care assessment of interleukin-6 in vaginal fluid in 92% of the women (141 of 153), and only those women were included in the analyses. Second, the rate of microbial invasion of the amniotic cavity and intraamniotic inflammation was 26% (36 of 141) and 19% (27 of 141), respectively. Microbial-associated intraamniotic inflammation was identified in 12% of the women (17 of 141). Third, a strong positive correlation was found between the interleukin-6 concentrations in vaginal and amniotic fluids (Spearman rho 0.68; P <.0001). Fourth, the presence of microbial invasion of the amniotic cavity, intraamniotic inflammation, or microbial-associated intraamniotic inflammation was associated with higher vaginal fluid interleukin-6 concentrations in both crude and adjusted analyses. Fifth, a vaginal fluid interleukin-6 concentration of 2500 pg/mL was determined to be the best cutoff value for the identification of microbial invasion of the amniotic cavity (sensitivity of 53% [19 of 36], specificity of 89% [93 of 104], positive predictive value of 63% [19 of 30], negative predictive value of 85% [93 of 110], positive likelihood ratio of 5.0 [95% confidence interval, 2.5–9.5], and negative likelihood ratio of 0.5 [95% confidence interval, 0.4–0.8]); intraamniotic inflammation (sensitivity of 74% [20/27], specificity of 91% [104/114], positive predictive value of 67% [20 of 30], negative predictive value of 94% [104 of 111], positive likelihood ratio of 8.4 [95% confidence interval, 4.5–15.9], and negative likelihood ratio of 0.3 [95% confidence interval, 0.2–0.5]); and microbial-associated intraamniotic inflammation (sensitivity of 100% [17 of 17], specificity of 90% [111 of 124), positive predictive value of 57% [17 of 30], negative predictive value of 100% [111 of 111], positive likelihood ratio of 9.5 [95% confidence interval, 5.7–16.0], and negative likelihood ratio of 0). Conclusion The point-of-care assessment of interleukin-6 in vaginal fluid is an easy, rapid, noninvasive, and inexpensive method for the identification of intraamniotic inflammation and microbial-associated intraamniotic inflammati n in preterm prelabor rupture of membranes pregnancies, showing good specificity and negative predictive value. © 2016 Elsevier Inc.
Sprache
Englisch
Identifikatoren
ISSN: 1097-6868, 0002-9378
eISSN: 1097-6868
DOI: 10.1016/j.ajog.2016.07.001
Titel-ID: cdi_swepub_primary_oai_gup_ub_gu_se_248124
Format
–
Schlagworte
amniocentesis
,
amniotic fluid
,
biomarkers
,
cytokine
,
interleukin
,
intraamniotic inflammation
,
lateral flow-based immunoassay
,
microbial invasion of the amniotic cavity
,
noninvasive procedure
,
Obstetrics, Gynecology and Reproductive Medicine
,
preterm
,
rapid test
,
Reproduktionsmedicin och gynekologi
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