Noninvasive Central Venous Pressure Measurement by Controlled Compression Sonography at the Forearm
Christoph Thalhammer, MD*,*,
Markus Aschwanden, MD*,
Angela Odermatt*,
Ulrich A. Baumann, MD ,
Stephan Imfeld, MD*,
Deniz Bilecen, MD, PhD ,
Stephan C. Marsch, MD, PhD and
Kurt A. Jaeger, MD*
* Department of Vascular Medicine, University Hospital, Basel, Switzerland
Department of Diagnostic Radiology, University Hospital, Basel, Switzerland
Medical Intensive Care Unit, University Hospital, Basel, Switzerland
Regional Hospital Center, Muensingen, Switzerland.
View larger version (92K):
[in this window]
[in a new window]
[Download PPT slide]
|
Figure 1 Noninvasive Pressure Measurement
(A) Pressure manometer connected to ultrasound transducer: (1) translucent silicone membrane, (2) ultrasound transducer, (3) flexible pressure tubing, (4) pressure meter. (B) Cross-sectional sonography: cephalic vein before and after compression.
|
|
View larger version (10K):
[in this window]
[in a new window]
[Download PPT slide]
|
Figure 2 Artificial Venous Hypertension and Interobserver Agreement
(A) Venous hypertension. Mean invasive peripheral venous pressure (PVPi) without cuff compression was 19.6 ± 4.7 cm H2O, followed by a linear increase in PVPi above a cuff pressure of 15 mm Hg. Maximal PVPi was 67.8 ± 6.9 cm H2O. (B) Interobserver agreement: intraclass correlation coefficient was 0.988. PVPn = noninvasive peripheral venous pressure.
|
|
View larger version (16K):
[in this window]
[in a new window]
[Download PPT slide]
|
Figure 3 PVPi and PVPn in Healthy Subjects
(A) Linear regression: positive correlation between PVPi and PVPn. (B) Bland-Altman plot: PVPi and PVPn plotted against their mean. Abbreviations as in Figure 2.
|
|
View larger version (10K):
[in this window]
[in a new window]
[Download PPT slide]
|
Figure 4 Below Heart Level Measurements in ICU Patients
(A) Linear regression: positive correlation between central venous pressure (CVP) and PVPn. (B) Bland-Altman plot: CVP and PVPn plotted against their mean. ICU = intensive care unit; other abbreviations as in Figure 2.
|
|
View larger version (9K):
[in this window]
[in a new window]
[Download PPT slide]
|
Figure 5 Heart Level Measurements in ICU Patients
(A) Linear regression: positive correlation between CVP and PVPn. (B) Bland-Altman plot: CVP and PVPn plotted against their mean. Abbreviations as in Figures 2 and 4.
|
|
|
