In TILDA, the majority of participants attending the health center assessment during the third wave of data collection (2014–2015) completed an orthostatic test. This is an instrumented assessment described as an “active stand” and has been reported on in this sample extensively elsewhere (20 (link),21 (link)). Participants were asked to stand as quickly as possible following a period of supine rest for a duration of 10 minutes. Participants with mobility difficulties were assisted by a research nurse if required. Continuous noninvasive beat-to-beat BP was recorded using a Finometer MIDI device (Finapres Medical Systems BV, Amsterdam, The Netherlands) at a sampling rate of 200 Hz. Data recording was initiated during supine resting and extended for 180 seconds after the participant had achieved orthostasis. Baseline values are calculated using data in 60- to 30-second period prior to orthostasis. The beginning of the orthostatic test, estimated using an integrated height sensor, was set to time zero for each participant. Beat-to-beat systolic BP (SBP) and HR were recorded. Nadir is the term employed in describing the initial drop in BP following orthostatic change.
Finometer midi device
Manufactured by Finapres Medical Systems
The Finometer MIDI is a non-invasive, continuous blood pressure monitoring device developed by Finapres Medical Systems. It provides real-time measurements of systolic, diastolic, and mean arterial blood pressure. The device utilizes the Finapres method, which employs a finger cuff to measure blood pressure changes in the finger.
Automatically generated - may contain errors
Lab products found in correlation
7 protocols using finometer midi device
1
Orthostatic test protocol for cardiovascular assessment
2
Cerebral Oxygenation and Postural Changes
Check if the same lab product or an alternative is used in the 5 most similar protocols
+ Expand
Cerebral oxygenation measurements in TILDA were acquired in a quiet room with a controlled temperature of between 21°C and 23°C. During the active stand, a NIRS device (Portalite; Artinis Medical Systems, Zetten, Netherlands) was fixed to the forehead (3 cm lateral and 3.5 cm superior to the nasion) in approximately in the FP1 position of the ten-twenty electrode system (Klem et al., 1999 (link)). The Oxysoft (V3.0.53, Artemis Medical Systems, Zetten, Netherlands) software facilitated data collection and allowed manual signal marking at the beginning of a rest period. A digital photoplethysmography device (Finometer MIDI device, Finapres Medical Systems BV, Amsterdam, The Netherlands) was attached to each participant and used for measuring continuous blood pressure and identifying the timing of postural transitions via a built-in height correction unit. Data were acquired continuously while participants lay supine for 10 min before transitioning to a standing position and remaining standing for a further 3 min. The sampling frequency of the NIRS device was 50 Hz.
3
Assessing Orthostatic Blood Pressure
Check if the same lab product or an alternative is used in the 5 most similar protocols
+ Expand
Participants underwent an AS test with the Finometer MIDI device (Finapres Medical Systems BV, Amsterdam, The Netherlands), performed by trained research nurses and recorded at 200 Hz. Participants underwent the AS following approximately 10 min of supine rest. Baseline BP was calculated as the mean value between 60 and 30 s before standing. Data was downsampled to 1 Hz. Two smoothing filters were applied, a 10-point moving average filter and an 11-point median filter. Onset of the stand was detected via an algorithm using data from the Finometer height correction unit [19 (link)]. Here we utilised BP response data up to 120 s post-stand, at 10-s intervals.
4
Orthostatic Hypotension Assessment Protocol
Check if the same lab product or an alternative is used in the 5 most similar protocols
+ Expand
Participants who attended the health center for assessment underwent an active stand, which noninvasively measures beat-to-beat BP response to stand following 10 minutes of supine rest, using digital photoplethysmography (Finometer MIDI device; Finapres Medical Systems). All recorded readings occurred in a silent room maintained at an ambient temperature of 21°C to 23°C under the supervision of a trained health nurse. Baseline BP was measured as the mean value between 60 and 30 seconds before standing during the rest period. BP was measured up to 110 seconds post stand, and estimated at 10-second intervals, using 5 seconds moving averages around each time point. Two measurements of BP response to stand were assessed in this study. Previous analysis of the TILDA data has shown that the majority of the TILDA population stabilized their BP within 40 seconds of stand, 22 (link) and therefore impaired stabilization of BP was defined as a sustained drop of ≥20 mm Hg systolic BP or ≥10 mm Hg diastolic BP up to 40 seconds post stand (impaired stabilization of BP on standing [ISBP]). We also analyzed participants who sustained a drop of ≥20 mm Hg systolic BP or ≥10 mm Hg diastolic BP throughout the 110 seconds stand, to represent those participants with the most severe OH (OH110). The OH110 group have a sustained drop in BP as defined by the American Autonomic Society. 23 (link)
5
Orthostatic Hemodynamic Evaluation Protocol
Check if the same lab product or an alternative is used in the 5 most similar protocols
+ Expand
Participants were required to lie in a supine position without speaking or moving for at least 10 minutes before standing up unassisted as quickly as possible after a countdown from 5 seconds. Over the course of the challenge, three markers of orthostatic hemodynamics were measured continuously: SBP, DBP and HR. A digital photoplethysmograph on the middle finger of the left hand (Finometer MIDI device, Finapres Medical Systems BV, Amsterdam, The Netherlands) facilitated beat-to-beat tracking of SBP, DBP and HR. This device also allowed for the time when the stand was initiated to be identified using a built in height correction unit [35] (link). A sling supported the participants’ left hand at approximately heart level. The room in which the tests were performed was kept at a temperature between 21°C and 23°.
6
Assessing Orthostatic Blood Pressure
Check if the same lab product or an alternative is used in the 5 most similar protocols
+ Expand
Participants underwent an AS test with the Finometer MIDI device (Finapres Medical Systems BV, Amsterdam, The Netherlands), performed by trained research nurses and recorded at 200 Hz. Participants underwent the AS following approximately 10 min of supine rest. Baseline BP was calculated as the mean value between 60 and 30 sec before stand. Data were downsampled to 1 Hz. Two smoothing filters were applied, a 10-point moving average filter and an 11-point median filter. Onset of the stand was detected via an algorithm using data from the Finometer height correction unit [18 (link)]. Here we utilised BP response data up to 120 sec post-stand, at 10-sec intervals.
7
Baroreflex Sensitivity Assessment Protocol
Check if the same lab product or an alternative is used in the 5 most similar protocols
+ Expand
Continuous plethysmographic arterial pressure and R–R intervals were recorded from the left middle finger before, during, and after each intervention in a supine position using a Finometer MIDI device and BeatScope Easy v02.10 software (Finapres Medical Systems, Enschede, The Netherlands). For the baroreflex sensitivity (BRS) assessment, time-domain and frequency-domain parameters were computed according to the Task Force of the European Society of Cardiology and the North American Society of Pacing and Electrophysiology [31] (link), using commercially available software (BeatScope Easy; Nevrokard BRS Analysis v6.3.0, Nevrokard, Izola, Slovenia).
About PubCompare
Our mission is to provide scientists with the largest repository of trustworthy protocols and intelligent analytical tools, thereby offering them extensive information to design robust protocols aimed at minimizing the risk of failures.
We believe that the most crucial aspect is to grant scientists access to a wide range of reliable sources and new useful tools that surpass human capabilities.
However, we trust in allowing scientists to determine how to construct their own protocols based on this information, as they are the experts in their field.
Ready to get started?
Sign up for free.
Registration takes 20 seconds.
Available from any computer
No download required
Revolutionizing how scientists
search and build protocols!