- Overview
- Clinical Application
- Technology Overview
- EIFU & Resources
A non-invasive haemodynamic monitoring solution that provides information to support clinical decision-making.
The ClearSight™ System provides continuous blood pressure and advanced haemodynamic parameters from a non-invasive finger cuff.
Proactive decision support for individualised patient care
Non-invasive haemodynamic monitoring offered by the ClearSight™ System provides haemodynamic information to support clinical assessment and decision-making across the continuum of care, including moderate- to high-risk surgery patients, and can be utilised to manage your patients’ changing clinical situations in the hospital environment.
Continuous non-invasive monitoring
Continuous non-invasive blood pressure (BP) from a non-invasive finger cuff in addition to key advanced haemodynamic parameters:
- Cardiac Output (CO)
- Stroke Volume (SV)
- Stroke Volume Variation (SVV)
- Systemic Vascular Resistance (SVR)
- Mean Arterial Pressure (MAP)
Access haemodynamic monitoring in patients where an arterial line may not be required
The ClearSight™ System gives you non-invasive access to automatically calculated, beat-to-beat haemodynamic 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
The ClearSight™ System connects to your patient’s finger. Upon starting a measurement, the finger 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 finger cuff should be re-applied to another finger. To increase comfort, two ClearSight™ finger cuffs may be connected simultaneously to alternate the measurement between two fingers. This allows uninterrupted continuous monitoring up to 72 hours.
Now available on HemoSphere advanced monitoring platform
HemoSphere™ Advanced Monitoring platform provides a comprehensive view of haemodynamics and tissue oximetry, providing continuous haemodynamic and tissue oximetry information to support patient monitoring. Full-range compatibility with non-invasive, minimally-invasive and catheter solutions allow you to pair a single monitor with the right device for your patient across different clinical settings and diverse patient profiles.
ClearSight™ System
Model | Description |
ClearSight™ Finger Cuff Small (multi pack, 5) | CSCS |
| ClearSight™ Finger Cuff Medium (multi pack, 5) | CSCM |
| ClearSight™ Finger Cuff Large (multi pack, 5) | CSCL |
Model | Description |
HemoSphere™ ClearSight™ Upgrade Kit | HEMCSMUPG |
| HemoSphere™ ClearSight™ Module | HEMCSM10 |
- Truijen, J et al. Noninvasive Continuous Hemodynamic Monitoring. Journal of Clinical Monitoring and Computing 2012;26(4):267–268.
The ClearSight™ System provides continuous haemodynamic information to support clinical assessment and decision-making.
Hypotension management
Studies show associations between intraoperative hypotension and:
Increased risk of Acute Kidney Injury (AKI)
Cardiac & Non-Cardiac Surgery1
Myocardial Injury MINS
Leading cause of post-operative mortality within 30 days after surgery1
Cleveland Clinic researchers discovered that:2
- Continuous non-invasive monitoring reduced the amount of IOH by nearly half when compared to intermittent blood pressure monitoring.
- Continuous haemodynamic monitoring may assist clinicians in identifying hypotension and monitoring patient status.
Clarity through advanced haemodynamic parameters CO, SV, SVV and SVR provide additional haemodynamic information that may assist assessment of preload, afterload and contractility.
Haemodynamic instability
Critically ill patients are often haemodynamically unstable owing to hypovolemia, cardiac dysfunction, and alterations in vasomotor function.3 These conditions may lead to deterioration into multi-organ failure, and eventually death.
Continuous access to pressure and flow parameters may assist assessment of haemodynamic status and support clinical management decisions.
The ClearSight system offers a non-invasive approach to monitoring the following key haemodynamic parameters:
- Cardiac Output (CO)
- Stroke Volume (SV)
- Stroke Volume Variation (SVV)
- Systemic Vascular Resistance (SVR)
- Mean Arterial Pressure (MAP)
Stroke volume data may be interpreted using established haemodynamic assessment principles, including the Frank-Starling relationship.
The patient’s response to a fluid challenge may be assessed by changes in SV, as indicated by location on the curve. Dynamic and flow-based parameters provide additional haemodynamic information that may support fluid management assessment.4
Frank-Starling relationship between preload and stroke volume (SV)
Sepsis Management
Severe sepsis and septic shock are leading causes of morbidity and mortality in patients admitted to the intensive care unit.
Access to CO and SV provides additional haemodynamic information that may assist clinicians when assessing patients with sepsis.
The non-invasive ClearSight™ System provides continuous haemodynamic monitoring, including flow-based parameters that may support assessment of haemodynamic status in patients with suspected sepsis.
Frank-Starling relationship between preload and stroke volume (SV)
- Salmasi, V., Maheshwari, K., Yang, G., Mascha, E.J., Singh, A., Sessler, D.I., & Kurz, A. (2017). Relationship between intraoperative hypotension, defined by either reduction from baseline or absolute thresholds, and acute kidney injury and myocardial injury. Anesthesiology, 126(1), 47-65
- Maheshwari, K et al. A Randomized Trial of Continuous Noninvasive Blood Pressure Monitoring During Noncardiac Surgery. Anesthesia & Analgesia, 2018 Aug; 127(2)424-431.
- Huygh, J., Peeters, Y., Bernards, J., Malbrain, M. (2016). Hemodynamic monitoring in the critically ill: an overview of current cardiac output monitoring methods.
- Cannesson, M. (2010) Arterial pressure variation and goal-directed fluid therapy. Journal of Cardiothoracic and Vascular Anesthesia, 24(3), 487-97.
- Marik, et al: Hemodynamic parameters to guide fluid therapy. Annals of Intensive Care 2011 1:1
How does it work?
ClearSight™ System technology is based on two methods: the volume clamp method to continuously measure blood pressure (BP) and the Physiocal method for initial and frequent calibration.
Volume Clamp Method
The essence of the volume clamp method involves clamping the artery to a constant volume by dynamically providing equal pressure on either side of the arterial wall. The volume is measured by a photo-plethysmograph built into the cuff.
The counter pressure is applied by an inflatable bladder inside the cuff and is adjusted 1000 times per second to keep the arterial volume constant.
Continuous recording of the cuff pressure results in real-time finger pressure waveform.1
The Physiocal method - Physiological Calibration
Physiocal is the real-time method for determining the proper arterial ‘unloaded’ volume, i.e. the volume without a pressure gradient across the arterial wall. Physiocal analyses the curvature and sharpness of the plethysmogram during short episodes of constant pressure levels. It then automatically and periodically recalibrates the system allowing tracking of physiological changes, e.g. in vasomotor tone.
Calibration interval starts at 10 beats, but it increases to every 70 beats as stability increases. Physiocal interval >30 beats is considered reliable.2
Brachial pressure reconstruction
Brachial pressure measurement is commonly used as a reference for non-invasive blood pressure assessment. The ClearSight™ System reconstructs the brachial arterial pressure waveform from the finger arterial pressure waveform. The reconstruction algorithm is based on a vast clinical database3
Cardiac output calculation
Stroke volume is calculated by an algorithm based on an improved pulse contour method. Cardiac output results from stroke volume times heart rate, and is updated every beat4
- Peñáz J. Photoelectric measurement of blood pressure, volume and flow in the finger. 1973; Dresden 1973. p. 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. doi: 10.1016/S0008-6363(97)00003-5
- Truijen J, van Lieshout JJ, Wesselink WA, Westerhof BE. Noninvasive continuous hemodynamic monitoring. J Clin Monit.Comput. 2012 Jun 14.
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