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Status unknownNCT01627470Updated Jun 25, 2012

Comparison of Continuous Non-invasive Pressure Device Versus Invasive Pressure Measurement During Prehospital Emergency

An observational study in Blood Pressure, sponsored by Robert Hanss. Status unknown at 1 site in Germany. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2012-06-25.

Sponsored by Robert Hanss · Observational

The sponsor has not verified this record recently (last verified Jun 2012), so the status shown — last known as Recruiting — may be out of date.
Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
40
Ages
18 Years and older
Sex
All
01

Study summary

The aim of the study is to evaluate the accuracy of continuous non-invasive AP monitoring (CNAP) compared to simultaneous IBP measurement in intensive care patients undergoing a transport in the ambulance car.

Since CNAP finger blood pressure is calibrated to NBP level, a systematic bias between IBP and CNAP as described by a recent FDA meta analysis [ ] is expected. The most important factor of CNAP system performance is its ability to accurately track blood pressure changes. Thus, the purpose of this investigation is to show that the bias between CNAP and IBP falls within the expected range and that blood pressure alterations are detected instantaneously.

The endpoints of the study are:

  • The agreement of systolic, diastolic and mean CNAP and IBP readings determined on a beat-to-beat basis during:
  • Takeover of the patient on the intensive care unit,
  • Transport of the patient from the intensive care unit to the ambulance car
  • Transport of the patient in the ambulance car
  • The agreement of systolic, diastolic and mean CNAP and IBP blood pres-sure changes determined on a beat-to-beat basis during:
  • Takeover of the patient on the intensive care unit,
  • Transport of the patient from the intensive care unit to the ambulance car
  • Transport of the patient in the ambulance car

The beat-to-beat readings of CNAP and IBP will be automatically recorded electronically on a memory card in the transport monitor. CNAP data will additionally be recorded directly on the CNAP Monitor with a memory stick. Safety will be assessed by clinical observations as well as adverse events (AE) recording.

Read the detailed description

Arterial pressure (AP) is one of the most important physiological variables. Particularly in emergency medicine, AP needs to be monitored repeatedly or even better, continuously. This is usually done using an oscillometric pressure device (NIBP). A number of studies emphasise the importance of continuous AP monitoring as more than 20% of all hypotensive episodes may be missed by NIBP and another 20% are detected with delay. Prolonged hypotension precedes 56% of perioperative cardiac arrests and is associated with a significant increase of the 1-year mortality rate, indicating that NBP monitoring especially in patients with cardiovascular diseases might be insufficient independent from the clinical setting. Recently, a monitor for continuous non-invasive AP monitoring (CNAP™ Monitor 500) was introduced. It was shown that during procedures with high risk of hypotension NIBP missed significant more hypotensive episodes than CNAP. At the moment we have no evidence of the performance of CNAP in the preclinical emergency medicine. The evaluation against the gold standard of invasive pressure measurement in this study will help us to evaluate the performance of CNAP in the preclinical setting.

02

Conditions studied

  • Blood Pressure

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Keywords

  • non-invasive arterial pressure
  • emergency
  • intensive care
03

In context

Emergencies

1,692 studies on the registry are indexed under Emergencies; 333 are open to participants now.

This study's planned enrollment of 40 is below the median of 353 across 714 observational studies indexed under Emergencies.

Browse Emergencies studies →

Lead sponsor

This is the only study on the registry with Robert Hanss as lead sponsor.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

ICU Patients with established arterial pressure measurement

Inclusion criteria

  • Patients willing and capable of giving informed consent or with legal agents willing of giving informed consent
  • Patients undergoing a transport from the intensive care unit to another institution with the ambulance car
  • Patients where the IBP cannula was already placed on the intensive care unit
  • Patients where IBP cannula, and CNAP upper arm cuff can be placed on the same arm, and CNAP finger cuff can be placed on the contra-lateral arm
  • Intact perfusion of both arm evidenced by a negative Allen's test
  • Age 18 years and above
  • ASA I-IV
  • Weight >= 40 and \<= 180 kg, BMI \< 35

Exclusion criteria

Exclusion Criteria:

  • Patients with history of neurological, neuromuscular seizure
  • Patients where IBP cannula cannot be placed in the radial artery
  • Patients with vascular implants at the sites of non-invasive blood pressure measurement (fingers and upper arm)
  • Patients with history of arrhythmias
  • Edematous patients
05

Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
40 participants (estimated)

Groups and cohorts

  • Cohort

    Emergency Patients with applied arterial blood pressure measurement

    Device: CNAP-Monitor

Interventions

  • DeviceCNAP-Monitor

    Continuous non-invasive arterial blood pressure recording

    Also known as: CNAP, Continuous non-invasive arterial blood pressure recording

06

What researchers measure

Primary outcomes

  1. agreement with invasive blood pressure

    beat-to-beat readings of CNAP and IBP

    Time frame: 1 year

07

Study locations

1 of 1 sites recruiting
  • University Hospital Schleswig-Holstein - Campus Kiel
    Kiel, 24105, Germany
    Recruiting
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jun 25, 2012, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT01627470
Lead sponsor
Robert Hanss
Responsible party
Robert Hanss (PD Dr. med., University Hospital Schleswig-Holstein) — Sponsor-investigator
First posted
Jun 25, 2012
Start date
Aug 2011
Primary completion
Aug 2012 (estimated)
Completion
Aug 2012 (estimated)
Last update
Jun 25, 2012

Study contacts

Robert Hanss, PD Dr.
study chair · UKSH-Campus Kiel

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is status unknown, as verified in Jun 2012. You cannot join it, but the record below documents what was studied.

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