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Record W1989685124 · doi:10.1016/s0034-7094(10)70075-1

Non-Invasive Hemodynamic Assessment of Non-pregnant, Healthy Pregnant and Preeclamptic Women using Bio-Reactance

2010· article· en· W1989685124 on OpenAlexaff
Yayoi Ohashi, Louis Furtado, John‏ Kingdom, José C. A. Carvalho

Bibliographic record

VenueBrazilian Journal of Anesthesiology · 2010
Typearticle
Languageen
FieldMedicine
TopicPregnancy and preeclampsia studies
Canadian institutionsUniversity of TorontoMount Sinai Hospital
Fundersnot available
KeywordsReactanceHemodynamicsMedicineObstetricsPregnancyPreeclampsiaGynecologyInternal medicineBiologyPhysics

Abstract

fetched live from OpenAlex

We compared hemodynamic profiles of healthy and mildly preeclamptic pregnant women at term, as well as those of non-pregnant controls, using a new non-invasive cardiac output monitor (NICOM) based on bio-reactance. We studied healthy term pregnant women at term (Preg, n = 10), mildly preeclamptic pregnant women at term (PregPE, n = 10), and healthy non-pregnant female volunteers (NonPreg, n = 10). With the subjects in the semi left lateral position, 4 electrodes of the NICOM device were applied to their chest wall, followed by a 15-minute rest period. Hemodynamic variables, including the systolic (SBP), diastolic (DPB) and mean arterial (MAP) pressures, as well as the heart rate (HR), stroke volume (SV), total peripheral resistance (TPR), cardiac output (CO), cardiac power output (CPO), and ventricular ejection time (VET) were then monitored for 15 minutes. The Preg and NonPreg groups showed similar hemodynamic profiles, except for a shorter VET in the Preg group (213.3 ± 19.3 ms versus 265.0 ± 28.8 ms, p < 0.001). The PregPE group showed higher SBP, DBP and MAP, as well as CPO (145.5 ± 12.6 mmHg; 94.5 ± 9.1 mmHg; 111.5 ± 9.8 mmHg; 1.6 ± 0.3 watts), compared to both the Preg (114 ± 12.1 mmHg; 71.7 ± 8.4 mmHg; 85.9 ± 9.3 mmHg; 1.1 ± 0.3 watts) and NonPreg (101.2 ± 11.9 mmHg; 66.7 ± 10.4 mmHg; 78.1 ± 10.6 mmHg; 1.0 ± 0.2 watts) groups. The PregPE group showed higher HR, CO, and TPR, and shorter VET (85.4 ± 8.4 beats.min-1; 6.6 ± 0.7 L.min-1; 1,369.9 ± 173.5 dyne.sec.cm-5, 221.6 ± 22.4 ms) compared to the NonPreg group (67.9 ± 9.5 beats.min-1; 5.6 ± 0.7 L.min-1; 1,136.9 ± 149.8 dyne.sec.cm-5, 265.0 ± 28.8 ms). The NICOM device is simple to use, operator independent, and provides clear and consistent monitoring signals. The output identified distinct hemodymamic profiles that are consistent with the findings of more invasive existing methods. Comparamos os perfis hemodinâmicos de gestantes saudáveis e com pré-eclâmpsia leve, a termo, assim como de controles saudáveis não grávidas, usando um novo monitor de débito cardíaco não invasivo (NICOM, do inglês) baseado na biorreatância. Estudamos gestantes saudáveis a termo (Preg, n = 10), gestantes a termo com pré-eclâmpsia leve (PregPE, n = 10) e mulheres saudáveis não grávidas (NonPreg, n = 10). Com as pacientes na posição de semidecúbito lateral esquerdo, 4 eletrodos do NICOM foram colocados na parede do tórax. Essa colocação foi seguida de um período de descanso de 15 minutos. Variáveis hemodinâmicas, incluindo pressão arterial sistólica (PAS), diastólica (PAD) e média (PAM), assim como frequência cardíaca (FC), volume sistólico (VS), resistência periférica total (RPT), débito cardíaco (DC), potência cardíaca (PC) e tempo de ejeção ventricular (TEV) foram monitorados por 15 minutos. Os grupos Preg e NonPreg apresentaram perfis hemodinâmicos semelhantes, exceto por um TEV mais curto no grupo Preg (213,3 ± 19,3 ms versus 265,0 ± 28,8 ms, p < 0,001). O grupo PregPE apresentou PAS, PAD e PAM mais elevadas, assim como PC (145,5 ± 12,6 mmHg; 94,5 ± 9,1 mmHg; 111,5 ± 9,8 mmHg; 1,6 ± 0,3 watts) quando comparado com os grupos Preg (114 ± 12,1 mmHg; 71,2 ± 8,4 mmHg; 85,9 ± 9,3 mmHg; 1,1 ± 0,3 watts) e NonPreg (101,2 ± 11,9 mmHg; 66,7 ± 10,4 mmHg; 78,1 ± 10,6 mmHg; 1,0 ± 0,2 watts). O grupo Preg apresentou FC, DC e RPT maiores e TEV mais curto (85,4 ± 8,4 batimentos.min-1; 6,6 ± 0,7 L.min-1; 1.369,9 ± 173,5 dina.seg.cm-5, 221,6 ± 22,4 ms) quando comparado ao grupo NonPreg (67,9 ± 9,5 batimentos.min-1; 5,6 ± 0,7 L.min-1; 1.136,9 ± 149,8 dina.seg.cm-5, 265,0 ± 28,8 ms). O NICOM é um equipamento fácil de ser usado, que independe do operador e fornece sinais de monitoramento claros e consistentes. A avaliação identificou perfis hemodinâmicos distintos e consistentes com os achados obtidos com métodos mais invasivos. Comparamos los perfiles hemodinámicos de embarazadas sanas y con preeclampsia ligera a término, como también los controles sanos de las no embarazadas, usando un nuevo monitor de débito cardíaco no invasivo (NICOM, del inglés), con base en la biorreactancia. Estudiamos embarazadas sanas a término (Embarazadas, n = 10), embarazadas a término con preeclampsia ligera (EmbarazadasPE, n = 10) y mujeres sanas no embarazadas (No Embarazadas, n = 10). Con las pacientes en posición de semidecúbito lateral izquierdo, 4 electrodos del NICOM fueron colocados en la pared del tórax. Esa colocación fue secundada por un período de descanso de 15 minutos. Variables hemodinámicas, incluyendo presión arterial sistólica (PAS), diastólica (PAD) y promedio (PAM), como también la frecuencia cardíaca (FC), volumen sistólico (VS), resistencia periférica total (RPT), débito cardíaco (DC), potencia cardíaca (PC) y tiempo de eyección ventricular (TEV), fueron monitorizados por 15 minutos. Los grupos Embarazada y No Embarazada, presentaron perfiles hemodinámicos parecidos, excepto por un TEV más corto en el grupo Embar. (213,3 ± 19,3 ms versus 265,0 ± 28,8 ms, p < 0,001). El grupo Embar. PE presentó PAS, PAD y PAM más elevados, y PC (145,5 ± 12,6 mmHg; 94,5 ± 9,1 mmHg; 111,5 ± 9,8 mmHg; 1,6 ± 0,3 watts), cuando se comparó con los grupos Embar. (114 ± 12,1 mmHg; 71,2 ± 8,4 mmHg; 85,9 ± 9,3 mmHg; 1,1 ± 0,3 watts) y No Embarazadas (101,2 ± 11,9 mmHg; 66,7 ± 10,4 mmHg; 78,1 ± 10,6 mmHg; 1,0 ± 0,2 watts). El grupo Embarazada presentó FC, DC y RPT más altos y TEV más corto (85,4 ± 8,4 latidos.min-1; 6,6 ± 0,7 L.min-1; 1.369,9 ± 173,5 dina.seg.cm-5, 221,6 ± 22,4 ms) cuando se le comparó con el grupo No Embarazadas (67,9 ± 9,5 latidos.min-1; 5,6 ± 0,7 L.min-1; 1.136,9 ± 149,8 dina.seg.cm-5, 265,0 ± 28,8 ms). El NICOM es un equipo fácil de ser usado, que no depende del operador y que suministra señales de monitoreo claras y consistentes. La monitorización identificó perfiles hemodinámicos distintos y consistentes con los hallazgos de los métodos más invasivos existentes.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: Observational
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.267
Threshold uncertainty score0.904

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0010.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0010.000
Bibliometrics0.0000.000
Science and technology studies0.0000.001
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.001
Insufficient payload (model declined to judge)0.0000.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.015
GPT teacher head0.301
Teacher spread0.286 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one teacher head, not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designObservational
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

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Citations34
Published2010
Admission routes1
Has abstractyes

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