- Overview
- Clinical Application
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A noninvasive solution that enables clinical decision support to help optimize pressure and flow
ClearSight™ Finger Cuff provides continuous blood pressure and advanced hemodynamic parameters, noninvasively. These continuous insights enable you to provide proactive hemodynamic management.
Proactive decision support for individualized patient care
ClearSight™ Finger Cuff provides noninvasive hemodynamic information to help enable proactive clinical decisions for moderate- to high-risk surgical patients and support management of changing clinical conditions.
Continuous noninvasive monitoring
Continuous noninvasive blood pressure (BP) from a noninvasive finger cuff in addition to key hemodynamic parameters:
- Cardiac Output (CO)
- Stroke Volume (SV)
- Stroke Volume Variation (SVV)
- Systemic Vascular Resistance (SVR)
- Mean Arterial Pressure (MAP)
Extend the benefits of hemodynamic monitoring
ClearSight™ Finger Cuff gives you noninvasive access to automatically calculated, continuous hemodynamic information for a broader patient population, including patients in whom an arterial line would not be typically be placed.1
A versatile approach to continuous monitoring
After placing ClearSight™ Finger Cuff on your patient's finger and initiating monitoring, the cuff can be used and re-applied for up to 72 hours on one patient. After 8 hours of continuous monitoring on a single finger, the cuff should be re-applied to another finger. To increase comfort, two ClearSight™ Finger Cuffs can be connected simultaneously to alternate the measurement between two fingers, which allows uninterrupted continuous monitoring up to 72 hours.
Smarter. Connected. All-in-one.
HemoSphere™ Monitor provides actionable insights into hemodynamic instability. When used with compatible technologies, HemoSphere™ Monitor delivers advanced pressure, flow and tissue oximetry insights from a single, comprehensive monitoring platform.
- Truijen J, van Lieshout JJ, Wesselink WA, Westerhof BE. Noninvasive continuous hemodynamic monitoring. J Clin Monit Comput. 2012;26(4):267-268
ClearSight™ Finger Cuff offers continuous clinical decision support to enable proactive clinical decisions for your moderate- to high-risk surgical patients.
Hypotension management
Intraoperative hypotension is a serious risk factor that, when left unmanaged, may lead to severe complications – including acute kidney injury (AKI), myocardial injury after non-cardiac surgery (MINS) and mortality.1-6
Cleveland Clinic researchers discovered that:7
- Continuous noninvasive monitoring reduced the amount of IOH by nearly half when compared to intermittent blood pressure monitoring.
- Early detection of hypotension by continuous hemodynamic monitoring allows for timely remedial actions, thereby reducing IOH.
Clarity through advanced hemodynamic parameters CO, SV, SVV and SVR can help you determine if the cause of IOH is preload, afterload, or contractility.
Critically ill patients are often hemodynamically unstable owing to hypovolemia, cardiac dysfunction or alterations in vasomotor function.7 These conditions may lead to deterioration into multi-organ failure and eventually death.
Continuous access to pressure and flow parameters allow you to evaluate hemodynamic instability and guide appropriate treatment including individualized fluid management.
ClearSight™ Finger Cuff offers a noninvasive approach to monitoring the following key hemodynamic parameters:
- Cardiac Output (CO)
- Stroke Volume (SV)
- Stroke Volume Variation (SVV)
- Systemic Vascular Resistance (SVR)
- Mean Arterial Pressure (MAP)
Dynamic, flow-based parameters provide a comprehensive hemodynamic assessment and may help guide individualized volume administration in patients and avoid excessive or insufficient administration.
When managing perfusion, SV can be optimized using the patient's own Frank-Starling curve.
- Salmasi V, Maheshwari K, Yang D, et al. Relationship between intraoperative hypotension, defined by either reduction from baseline or absolute thresholds, and acute kidney injury and myocardial injury. Anesthesiology. 2017;126(1);47-65
- Mascha EJ, Yang D, Weiss S, Sessler D. Intraoperative mean arterial pressure variability and 30-day mortality in patients having noncardiac surgery. Anesthesiology. 2015;123(1):1-13
- Gregory A, Stapelfeldt WH, Khanna AK, et al. Intraoperative hypotension is associated with adverse clinical outcomes after noncardiac surgery. Anesth Analg. 2021;132(6);1654-1665
- Wesselink EM, Kappen TH, Torn HM, Slooter AJC, van Klei WA. Intraoperative hypotension and the risk of postoperative adverse outcomes: a systematic review. Br J Anaesth. 2018;121(4):706-721
- Maleczek M, Laxar D, Geroldinger A, Kimberger O. Intraoperative hypotension is associated with postoperative nausea and vomiting in the PACU: a retrospective database analysis. J Clin Med. 2023;12(2009):1-13
- Dogan L, Yildirim SA, Sarikaya T, Ulugol H, Gucyetmez B, Toraman F. Different types of intraoperative hypotension and their association with post-anesthesia care unit recovery. J Clin Med. 2023;18(1):44
- Maheshwari K, Khanna S, Bajracharya GR, et al. A randomized trial of continuous noninvasive blood pressure monitoring during noncardiac surgery. Anesth Analg. 2018;127(2):424-431.
How does it work?
ClearSight™ Cuff technology is based on four methods to continuously measure blood pressure and key hemodynamic parameters.
Volume Clamp Method
An inflatable bladder dynamically provides equal pressures on either side of the arterial wall by clamping the artery to a constant volume. The cuff pressure is adjusted 1000 times each second to keep the diameter of the finger arteries constant.
Continuous recording of the cuff pressure results in real-time finger pressure waveform.1
The Physiocal Method - Physiological Calibration
The Physiocal method determines the real-time proper arterial 'unloaded' volume (i.e., no pressure gradient across the arterial wall). It then automatically and periodically adjusts and recalibrates to compensate for physiologic changes (e.g., during vasoconstriction).
Calibration interval starts at 10 beats but will increase to every 70 beats as stability increases. Physiocal interval >30 beats is considered reliable.2
Radial Pressure Reconstruction
The clinical gold standard for continuous BP monitoring is a radial arterial line. ClearSight™ Cuff technology reconstructs a radial arterial pressure waveform from the finger arterial pressure waveform using an algorithm based on a vast clinical database3. The noninvasive finger cuff when paired with a compatible monitor will provide blood pressure parameter values (SBP, DBP and MAP).
Cardiac Output Calculation
Stroke volume is calculated using an algorithm derived from the pulse contour method, which analyzes the arterial pressure waveform and combines advanced physiological modeling with patient-specific characteristics, including age, sex, height, and weight, to calculate afterload. Cardiac output is then calculated by multiplying stroke volume by pulse rate, with values updated every 20 seconds.
- Peñáz J. Photoelectric measurement of blood pressure, volume and flow in the finger. Dresden. 1973:104
- Wesseling KH, Wit B, Hoeven GMA, Goudoever J, Settels JJ. Physiocal, calibrating finger vascular physiology for Finapres. Homeostasis. 1995;36:67–82
- Gizdulich P, Prentza A, Wesseling KH. Models of brachial to finger pulse wave distortion and pressure decrement. Cardiovasc Res. 1997;33:698–705
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