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01.12.2018 | Research Article | Ausgabe 1/2018 Open Access

BMC Geriatrics 1/2018

Blood pressure change does not associate with Center of Pressure movement after postural transition in geriatric outpatients

Zeitschrift:
BMC Geriatrics > Ausgabe 1/2018
Autoren:
Sjoerd T. Timmermans, Esmee M. Reijnierse, Jantsje H. Pasma, Marijke C. Trappenburg, Gerard J. Blauw, Andrea B. Maier, Carel G. M. Meskers
Wichtige Hinweise

Electronic supplementary material

The online version of this article (https://​doi.​org/​10.​1186/​s12877-017-0702-2) contains supplementary material, which is available to authorized users.

Abstract

Background

Orthostatic hypotension (OH), a blood pressure drop after postural change, is associated with impaired standing balance and falls in older adults. This study aimed to assess the association between blood pressure (BP) and a measure of quality of standing balance, i.e. Center of Pressure (CoP) movement, after postural change from supine to standing position in geriatric outpatients, and to compare CoP movement between patients with and without OH.

Methods

In a random subgroup of 75 consecutive patients who were referred to a geriatric outpatient clinic, intermittent BP measurements were obtained simultaneously with CoP measurements in mediolateral and anterior-posterior direction directly after postural change during 3 min of quiet stance with eyes open on a force plate. Additional measurements of continuous BP were available in n = 38 patients. Associations between BP change during postural change and CoP movement were analyzed using Spearman correlation. Mann-Whitney-U tests were used to compare CoP movement between patients with OH and without OH, in which OH was defined as a BP drop exceeding 20 mmHg of systolic BP (SBP) and/or 10 mmHg of diastolic BP (DBP) within 3 min after postural change.

Results

OH measured intermittently was found in 8 out of 75 (11%) and OH measured continuously in 22 out of 38 patients (57.9%). BP change did not associate with CoP movement. CoP movement did not differ significantly between patients with and without OH.

Conclusions

Results do not underpin the added value of CoP movement measurements in diagnosing OH in a clinical setting. Neither could we identify the role of CoP measurements in the understanding of the relation between OH and impaired standing balance.
Zusatzmaterial
Additional file 1: Table S1. Association between continuously measured maximum BP change and Center of Pressure (CoP) movement 15 s before (n = 10), during (n = 35) and after (n = 36) maximum BP change. (DOCX 16 kb)
12877_2017_702_MOESM1_ESM.docx
Additional file 2: Table S2. Association between intermittently measured BP change at 1 min and Center of Pressure (CoP) movement in the period 45-60s (15 s before BP measurement, n = 72) and 60-75 s (15 s after BP measurement, n = 72) and between intermittently measured BP change at 3 min and CoP movement in the period 165-180 s (15 s after, n = 59). (DOCX 18 kb)
12877_2017_702_MOESM2_ESM.docx
Literatur
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