Respiration Validation for CPM Device

Analog Device, Inc.41 enrolled

Overview

This study is designed to be a clinical validation study to ready the CPM System for FDA 510(k) submission. This study will be conducted as a prospective non-randomized. The study is non-significant risk since the CPM Device is noninterventional and noninvasive. The study is primarily designed to validate the accuracy of the respiration rate and the changes in relative tidal volume. All participants will be fitted with both the CPM Device as well as reference devices (capnography and ECG). Participants will be randomized between 4 procedures (A-D) which will determine the order of 10 exercises. Each exercise has about 2 minutes of device recording and two minutes of rest. Each exercise contains two positions: sitting up for one minute and lying down for one minute. For some exercises, the participant will be instructed to breathe at a certain rate (assisted by a metronome). For other exercises, the participants will breathe at a normal rate but change how deep the are breathing. For the last, all capnography reference devices will be removed, and an ECG reference device will be placed. After exercise 18, the participant will have all devices removed and the study visit will terminate. The participant will receive a safety follow-up call about 1 week after their visit.

Study Type

INTERVENTIONAL

Allocation

Purpose

DIAGNOSTIC

Masking

NONE

Enrollment

Conditions

Cardiopulmonary Disease

Eligibility

Sex: ALLMin age: 18 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Adults over the age of 18 and who are willing and able to give informed consent * Willing and able to participate in all activities related to this study, including trimming chest hair and wearing a reference device and the CPM wearable device * Volunteers of any race, any gender * Range of physiques * Healthy Exclusion Criteria: * Injury or skin disturbance in the area of the test device * Allergies or sensitivities to silicone/acrylic-based adhesive * Pregnant * Currently smokes cigarettes * Has known respiratory conditions that might prevent them from following the study procedure such as: * Flu * Pneumonia/bronchitis * Shortness of breath/respiratory distress * Respiratory or lung surgery * Emphysema, COPD, lung disease * Has self-reported heart or cardiovascular conditions such as chest pain, AFib, CHF, cardiomyopathy, or other conditions that could interfere with cardiopulmonary function * Has other self-reported health conditions that could interfere with the breathing patterns and exercises detailed in the protocol (including wearing a capnography mask)

Outcomes

Primary Outcomes

Accuracy of CPM System Calculated RR Versus Reference Device Via Percent of Error Accuracy of Respiration Rate

Percentage of respiration rate error within ± 2bpm. Acceptance criteria for clinical utility is \>= 85%. The percentage of respiration rate within ± 2brpm was calculated by data points, regardless of its rate and breathing condition, which the CPM System did not screen, therefore reporting the numeric values. Each data point will produce binary result (True or False) if the error is within ± 2 brpm. Assuming this binary result follows a binominal distribution, its confidence interval is also calculated.

Time frame: 90 minutes

Root Mean Squared Error (RMSE) of Respiration Rates From the CPM System vs Reference Device for Metronome Guided Breathing and Non-metronome Guided Breathing.

First, the subject-specific linear fitting is performed after taking the natural log of both CPM's rTV and reference TV. Then, the residual errors in rTV after the fitting were calculated. Finally, all subject's residual errors are pooled together to calculate the root mean squared (RMS) residual relative errors. The confidence interval was calculated assuming the square of this error follows Chi-square distribution. This error characterized in a log-log domain is converted back to characterize a relative accuracy by taking an exponential of natural constant followed by subtraction of one. The RMS of residual error in % is characterized in this way because the linear fitting in the log-log domain and its residual errors represents faithful relative residual error regardless of an absolute value of TV.

Time frame: 90 minutes

Secondary Outcomes

Performance of CPM System's ECG by % of CPM ECG Strip Equivalent to Lead II Strip

Performance of CPM System's ECG is measurement by comparing CPM System ECG metrics to the reference device Lead II ECG strip. Clinicians reviewed the criteria below and decided if the CPM strip had equivalence to the Lead II strip.

Time frame: device measurement (3 minutes)

ECG Accuracy Confirmation Comparing CPM Systems Generated ECG Metrics and Reference Lead II Generated ECG Metrics

Determine the accuracy of CPM System's ECG metrics to the reference device. Results are displayed as mean error with standard deviation of error.