Oximeter Behavior While Using a Tourniquet

Segman, Yosef Joseph; Trahtemberg, Uriel

doi:10.4172/2155-9880.1000480

Cited by 5 publications

(6 citation statements)

References 8 publications

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“…The combination of a multiple optical sensing technology with this novel and innovative mathematical algorithm has finally resulted in a medical device, which is capable to predict capillary tissue glucose concentrations with high quality. The underlying technology is also capable to collect and predict additional body signals such as hemodynamics, including blood pressure, pulse, stroke volume, cardiac output; blood gases, including pH, pCO 2 , pO 2 , HCO 3 ; hematology, including hemoglobin, RBC, HCT, and so on, which is currently subject to a second medical product (TensorTip MTX device) 30,34,35 independent from the CoG device presented in this article. The TensorTip family has similar hardware and mechanical design, however each bioparameter under consideration has a dedicated software procedure.…”

Section: Discussionmentioning

confidence: 99%

Device and Method for Noninvasive Glucose Assessment

Segman

2018

J Diabetes Sci Technol

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Section: Discussionmentioning

confidence: 99%

Device and Method for Noninvasive Glucose Assessment

Segman

2018

J Diabetes Sci Technol

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“…Other studies of this device on more extreme cases corroborate the device validity. 20 Based on current results, the MTX offers for the first time a simple and accurate noninvasive way to measure blood parameters. It is clear that this compact noninvasive device will have many useful applications.…”

Section: Discussionmentioning

confidence: 91%

“…The MTX device has been previously analyzed for accuracy in measuring hemodynamic BP and Hgb noninvasively and was found to produce accurate, repeatable readings. 18 – 20 …”

Section: Introductionmentioning

confidence: 99%

“…The MTX device has been previously analyzed for accuracy in measuring hemodynamic BP and Hgb noninvasively and was found to produce accurate, repeatable readings. [18][19][20] The aim of the current evaluation was to assess the concordance of Hgb, HCT, RBC, BP, and HR obtained noninvasively via the MTX with the values obtained from current laboratory methods.…”

Section: Introductionmentioning

confidence: 99%

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Post marketing study of hemodynamic and hematological noninvasive readings in a blood bank

Segman

Sheiman

2018

SAGE Open Medicine

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Objectives:This validation test was conducted in the Fujisan Blood Bank, Fortaleza, Brazil and evaluated the noninvasive TensorTip MTX (MTX, Cnoga Medical Ltd.) readings of hemoglobin, hematocrit, red blood cells, blood pressure, and heart rate compared to reference lab device readings. Generally, these parameters are measured from venous or capillary blood samples run on a laboratory analyzer or handheld invasive testing devices. Needle sticks are inconvenient to blood donors with relatively high exposure risks. To our vision, noninvasive determination would be of benefit to blood contributors and medical professional teams; it would be fast and painless.Methods:A total of 334 subjects were included in the Fujisan blood bank validation (65% male, 35% female). Hemoglobin, hematocrit, and red blood cells, as well as blood pressure and heart rate, were measured noninvasively using the MTX device and were compared to venous blood samples run on two laboratory hematology analyzers (Horiba ABX Micros60 and Siemens blood count analyzer), to digital sphygmomanometer (OMRON BP786) and to manual auscultation. The noninvasive measurement with the appropriate virtual arm cuff setting was performed simultaneously with the blood sample extraction of the reference devices measurement.Results:There was no statistically significant difference (p > 0.05, paired, two-tailed t-test) between the average daily hemoglobin, hematocrit, and red blood cells measurements provided by the MTX device and the laboratory hematology analyzer. In addition, there was no significant difference between the daily blood pressure and heart rate results provided by the MTX device and the digital and manual sphygmomanometers. The error calculated between the MTX and the reference device was found to be sufficiently accurate according to the relevant standards.Conclusion:The MTX accuracy of noninvasive hemoglobin, hematocrit, red blood cells, blood pressure, and heart rate measurements satisfies the industrial standards; therefore, the device enables more accurate, efficient, and effective patient care.

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“…The TensorTip MTX is a relative new device. To our knowledge, the studies thus far available have solely been conducted by the manufacturer [7][8][9]. The conditions that a BP device must meet, in order to be approved, are clearly stated in the universal standard (the Association for the Advancement of Medical Instrumentation (AAMI)/European Society of Hypertension (ESH)/International Organization for Standardization (ISO)) for the validation of BP measuring devices [5].…”

Section: Introductionmentioning

confidence: 99%

Perioperative Validation of the TensorTip™ MTX Device for Noninvasive Arterial Pressure Measurement: A Method Comparison Study

Servaas¹,

Eijk²,

Vreede³

et al. 2022

Cardiol Res

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Background:The noninvasive TensorTip™ MTX measures blood pressure by interpreting blood diffusion color of the finger skin. In addition to blood pressure, the device is able to measure various vital signs: heart rate, oxygen saturation, stroke volume, and cardiac output. Studies about accuracy and precision thus far available have only been conducted by the manufacturer. The aim of our study was to investigate the accuracy and precision of the TensorTip MTX in comparison to invasive radial artery blood pressure values.Methods: Forty-one patients scheduled for elective surgery were enrolled in this study. Placement of the arterial catheter had to be part of the standard of care. Once hemodynamic stable conditions were achieved, blood pressure was measured. Three measurements with the TensorTip MTX were averaged and compared with one invasive blood pressure measurement using Bland-Altman plot and error grid analysis.Results: Systolic, diastolic, and mean blood pressure had a bias of respectively 6.2, -6.9 and 4.4 mm Hg. Corresponding standard deviation were respectively 30.1, 17.0 and 22.2. Calculated percentage errors were 47.6%, 52.9% and 52.3%. Proportional bias was present in all Bland-Altman analyses. Error grid analysis showed 61.0% of systolic blood pressure measurements, and 46.3% of mean blood pressure measurements were in the clinical acceptable zone. Conclusions:The TensorTip MTX was not able to reliably measure blood pressure compared to blood pressure obtained with an arterial catheter and therefore, the measurement performance is not clinically acceptable. Moreover, a high malfunction rate makes the device unsuitable for use in perioperative period.

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Oximeter Behavior While Using a Tourniquet

Cited by 5 publications

References 8 publications

Device and Method for Noninvasive Glucose Assessment

Device and Method for Noninvasive Glucose Assessment

Post marketing study of hemodynamic and hematological noninvasive readings in a blood bank

Perioperative Validation of the TensorTip™ MTX Device for Noninvasive Arterial Pressure Measurement: A Method Comparison Study

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