Study for the Evaluation of a Non-invasive Hemodynamic Measurement in Heart Failure Patients

• Conditions: Congestive Heart Failure
• Interventions: Device: ezCVP measurement

• Registration Number: NCT05441696
• Lead Sponsor: Nihon Kohden

Brief Summary

Track changes in non-invasive central venous pressure across hospital stay and relationship with readmission

Detailed Description

Determining the degree of congestion is important in deciding appropriate timing for discharging hospitalized heart failure patients. Central venous pressure (CVP) reflects the returning blood volume to the heart and can guide therapy to relieve congestion. However, the conventional method used to measure CVP has notable limitations as it is an invasive procedure that requires placement of a central venous catheter.

Traditional, non-invasive methods of estimating CVP, such as physical examination and echocardiogram, are less accurate and more resource intensive. To overcome this challenge, new technology to assess CVP non-invasively using an oscillometric method has been developed. This new technology involves measurement of the enclosed zone central venous pressure (ezCVP), which, in a preclinical study, has been shown to correlate with invasive data.

Additionally, a previous correlation study demonstrated that the ezCVP value can be mathematically adjusted to estimate invasive CVP. The resulting value has been termed CVPNI (CVP Non-Invasive). Most recently, a limited pilot study of patients hospitalized with acute, decompensated heart failure demonstrated the feasibility of device use in this population and the expected and incremental fall in CVPNI with medical treatment over the course of hospitalization.

Moving forward, and in order to further improve the care of patients hospitalized with heart failure, an expanded pilot study of ezCVP technology is needed to prove that changes in CVPNI track with these patients' condition during admission and can be useful in their clinical care.

Study Timeline

• Study Start: 2022-06-01
• Study First Submitted: 2022-06-21
• Study First Submitted QC: 2022-06-28
• Study First Posted: 2022-07-01
• Status Verified: 2024-03
• Last Update Submitted: 2024-12-21
• Last Update Posted: 2024-12-27
• Primary Completion: 2025-09-30
• Study Completion: 2026-09-29

Recruitment & Eligibility

• Status: ENROLLING_BY_INVITATION
• Sex: All
• Target Recruitment: 65

Inclusion Criteria

• Arm circumference of 23 cm to 55 cm
• Subject admitted to the hospital with acute exacerbation of heart failure, with either reduced or preserved ejection fraction
• Subject is at risk for readmission (NYHA Functional Classification 2-3)
• Subject is able to understand the risks and potential benefits of participating in the study and is willing to provide written, informed consent
• ezCVP indicator is high (CVPNI is over 9 mmHg) at admission
• Subject is willing and able to comply with protocol procedures
• Subject tested negative for COVID test after admission to the hospital

Exclusion Criteria

• Finger and upper arm anatomical anomaly or disease that may interfere with attaching a pulse oximeter sensor and/or blood pressure cuff
• Pregnant (self-reported)
• Upper extremity DVT (currently being treated)
• Severe skin disease involving the upper arm(s)
• Study investigator may exclude patients based on clinical judgement

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
Adult CHF subjects with initial high CVP	ezCVP measurement	Adult subjects with congestive heart failure diagnosis who have an indicated high non-invasive estimated central venous pressure on first measurement after clinical unit admission.
Adult CHF subjects with initial low CVP	ezCVP measurement	Adult subjects with congestive heart failure diagnosis who have an indicated low non-invasive estimated central venous pressure on first measurement after clinical unit admission.

Primary Outcome Measures

Name	Time	Method
Evaluate the difference between non-invasive CVP measurement at admission and at discharge	7 days	Compare CVPNI at time of admission and discharge in clinical unit CVPNI (CVP subscript NI) is a numeric value equivalence of central venous pressure non-invasive measured in mmHg.
Evaluate the difference between non-invasive CVP measurement in right and left arms	7 days	Compare CVPNI (mmHg) for measurements on left and right arm for same subject

Secondary Outcome Measures

Name	Time	Method
Compare changes in CVPNI to changes in KCCQ quality scores	21 days	For each of the 3 Kansas City Cardiomyopathy Questionnaire (KCCQ) totals (integer number with no unit of measure): 1. Overall summary score; 2. clinical summary score; 3. symptom stability score: calculate: ∆KCCQ = KCCQ@14 days - KCCQ@admission. Count number of subjects in each group: ABSOLUTE(∆KCCQ) \< 6 (no significant change); ∆KCCQ \>= 6 (significant change improvement); ∆KCCQ \<= -6 (significant change worsening).; Compare to ∆CVPNI (unit = mmHg) = CVPNI-mean@admission - CVPNI-mean@discharge. Count number of subjects in each group: ∆CVPNI \<= 0 (no improvement or worsening); ∆CVPNI \> 0 \& \< 5 (improvement); ∆CVPNI \> 5 (large improvement).
Evaluate the relationship between CVPNI and readmission rate for low and high ezCVP subjects	100 days	Compare CVPNI at time of discharge for high ezCVP subjects versus low ezCVP subjects to subsequent readmission occurrence within 90-100 days post hospital discharge. Readmission is a binary value (true or false).
Evaluate the relationship between CVPNI at discharge and readmission rate	100 days	Compare CVPNI (mmHg) at time of discharge for high ezCVP subjects to subsequent readmission occurrence within 90-100 days post hospital discharge
Evaluate the relationship between CVPNI to clinical parameter weight during hospitalization	7 days	Compare CVPNI changes (∆ mmHg) for high ezCVP subjects during hospitalization to change in measured weight (∆ g)

Trial Locations

Locations (2)

Veterans Affairs Hospital; 🇺🇸 Palo Alto, California, United States

Stanford Medical Center; 🇺🇸 Stanford, California, United States