Human gallbladder pressure and volume: validation of a new direct method for measurements of gallbladder pressure in patients with acute cholecystitis
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Human gallbladder pressure and volume : validation of a new direct method for measurements of gallbladder pressure in patients with acute cholecystitis. / Borly, L; Højgaard, L; Grønvall, S; Stage, J G.
I: Clinical physiology (Oxford, England), Bind 16, Nr. 2, 03.1996, s. 145-56.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Human gallbladder pressure and volume
T2 - validation of a new direct method for measurements of gallbladder pressure in patients with acute cholecystitis
AU - Borly, L
AU - Højgaard, L
AU - Grønvall, S
AU - Stage, J G
PY - 1996/3
Y1 - 1996/3
N2 - Increased gallbladder (GB) pressure is probably a part of the pathogenesis of acute cholecystitis, and measurements of GB pressure might therefore be of interest. The aim of this study was to validate a microtip pressure transducer for intraluminal GB pressure measurements. In vitro precision and accuracy was within 0.2 mmHg, (SD) and 0.6 +/- 0.1 mmHg (mean +/- SD), respectively. Pressure rise rate was 24.8 +/- 5.5 mmHg s-1. Zero drift was in the range 0.3 +/- 0.4 to 0.8 +/- 0.9 mmHg (mean +/- SD). GB pressure was investigated in 16 patients with acute cholecystitis treated with percutaneous ultrasonically guided cholecystostomy. Basal intraluminal GB pressure was 8.9 mmHg (2.1-12.2 mmHg; n = 9, open cystic duct) and 1.8 and 5.8 mmHg (n = 2, closed cystic duct). There was no significant difference between two different measurements in the same patients (n = 5). The pressure was significantly influenced by respiration (n = 8) and the pressure seems to be higher in the sitting position than in the supine position (n = 5). Cystic duct opening pressure was 10.4, 11.2 and 16.8 mmHg (n = 3). Pressure-volume responses showed that the GB up to a certain volume could accommodate increases in intraluminal volume with only slight changes in intraluminal pressure (n = 4). Except for the zero drift, this piece of equipment seemed to fulfil the requirements of being able to measure pressure in the GB. In vivo measurements showed a good clinical reproducibility of the method, and also that respiration and patient posture influenced the pressure measurements. Further, a GB pressure-volume relationship was demonstrated, and the possibility of a cystic duct opening pressure was described.
AB - Increased gallbladder (GB) pressure is probably a part of the pathogenesis of acute cholecystitis, and measurements of GB pressure might therefore be of interest. The aim of this study was to validate a microtip pressure transducer for intraluminal GB pressure measurements. In vitro precision and accuracy was within 0.2 mmHg, (SD) and 0.6 +/- 0.1 mmHg (mean +/- SD), respectively. Pressure rise rate was 24.8 +/- 5.5 mmHg s-1. Zero drift was in the range 0.3 +/- 0.4 to 0.8 +/- 0.9 mmHg (mean +/- SD). GB pressure was investigated in 16 patients with acute cholecystitis treated with percutaneous ultrasonically guided cholecystostomy. Basal intraluminal GB pressure was 8.9 mmHg (2.1-12.2 mmHg; n = 9, open cystic duct) and 1.8 and 5.8 mmHg (n = 2, closed cystic duct). There was no significant difference between two different measurements in the same patients (n = 5). The pressure was significantly influenced by respiration (n = 8) and the pressure seems to be higher in the sitting position than in the supine position (n = 5). Cystic duct opening pressure was 10.4, 11.2 and 16.8 mmHg (n = 3). Pressure-volume responses showed that the GB up to a certain volume could accommodate increases in intraluminal volume with only slight changes in intraluminal pressure (n = 4). Except for the zero drift, this piece of equipment seemed to fulfil the requirements of being able to measure pressure in the GB. In vivo measurements showed a good clinical reproducibility of the method, and also that respiration and patient posture influenced the pressure measurements. Further, a GB pressure-volume relationship was demonstrated, and the possibility of a cystic duct opening pressure was described.
KW - Acute Disease
KW - Cholecystitis
KW - Equipment Design
KW - Evaluation Studies as Topic
KW - Fiber Optic Technology
KW - Gallbladder
KW - Gastroenterology
KW - Humans
KW - Posture
KW - Pressure
KW - Respiration
KW - Transducers
KW - Journal Article
M3 - Journal article
C2 - 8964132
VL - 16
SP - 145
EP - 156
JO - Clinical Physiology
JF - Clinical Physiology
SN - 0144-5979
IS - 2
ER -
ID: 165884592