Abstract
Patterns of meal-and cerulein-induced gallbladder emptying (GBE) were compared in four dogs equipped with a force transducer implanted onto the body of the gallbladder, and in four unoperated animals. GBE was examined by real-time ultrasonography in conscious dogs. In two dogs the ultrasonographic measurement of GBE was performed simultaneously with the registration of the strain exerted on the force transducer fixed on the gallbladder body. Implantation of the force transducer onto the gallbladder impaired neither postprandial nor cerulein-induced GBE. The contractile response of the gallbladder exhibited a nonlinear relationship to the gallbladder volume. The reduction of gallbladder volume to 50% of its basal value was accompanied by an increase in strain amounting to about 16% of the maximum response, whereas a pronounced augmentation of the strain was observed with gallbladder volume ranging between 30% and 10% of the basal value. On the other hand, the contractile response of the gallbladder registered by means of a force transducer was linearly related to the angle α contained between two radii passing from the gallbladder center towards the edges of the strain gauge:y=0.852α−30.97 (r=0.959,P<0.001) in the case of i.v. cerulein infusion at stepwisely increasing doses (0.7–2.2–7.4–22.2–66.5 pmol·kg−1h−1), andy=0.640α−17.40 (r=0.869,P<0.001) for a 1-h constant-rate 22.2 pmol·kg−1h−1 cerulein infusion.
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References
Tanaka M, Sarr MG, Miller LJ, et al. Changes in tone of canine gallbladder measured by an electronic pneumatic barostat. Am J Physiol 1990;259:G314-G320.
Traynor O, Dozois RR, DiMagno EP. Canine interdigestive and postprandial gallbladder motility and emptying. Am J Physiol 1984;246:G426-G432.
Jonderko K, Ferré JP, Buéno L. Real-time ultrasonography as a noninvasive tool for the examination of canine gallbladder emptying: A validation study. J Pharm Toxicol Meth 1992;27:107–111.
Jonderko K, Ferré JP, Buéno L. Noninvasive evaluation of kinetics of gallbladder emptying and filling in the dog. A real-time ultrasonographic study. Dig Dis Sci 1994;39:2624–2633.
Dodds WJ, Groh WJ, Darweesh RMA, et al. Sonographic measurement of gallbladder volume. Am J Roentgenol 1985;145:1009–1011.
Pascaud XB, Genton MJH, Bass P. A miniature transducer for recording intestinal motility in unrestrained chronic rats. Am J Physiol 1978;235:E532-E538.
Jonderko K, Buéno L. Kinetics of emptying and filling of strain gauge-bearing gallbladder. A real-time ultrasonographic study in the dog. Med Sci Monit 1996;2:710–715.
Elashoff JD, Reedy TJ, Meyer JH. Analysis of gastric emptying data. Gastroenterology 1982:83:1306–1312.
Jonderko K. Comparative analysis of quantitative gastric emptying indices and power-exponential modelling of gastric emptying curves. Clin Phys Physiol Meas 1989;10:161–170.
Armitage P. Statistical methods in medical research. Oxford: Blackwell Scientific, 1971.
Wissenschaftliche Tabellen Geigy, Teilband Statistik, 8. Auflage, Basel: Ciba-Geigy AG, 1980.
Jacoby HI, Bass P, Bennett DR. In vivo extraluminal contractile force transducer for gastrointestinal muscle. J Appl Physiol 1963;18:658–665.
Bass P, Wiley JN. Contractile force transducer for recording muscle activity in unanesthetized animals. J Appl Physiol 1972;32:567–570.
Itoh Z, Takahashi I. Periodic contractions of the canine gallbladder during the interdigestive state. Am J Physiol 1981;240:G183-G189.
Mathie RT, Plail RO, Stubbs RS. Pressure changes in canine gall-bladder associated with emptying. J Physiol 1987;393:545–554.
Matsumoto T, Sarna SK, Kondon RE, et al. Canine gallbladder cyclic motor activity. Am J Physiol 1988;255:G409-G416.
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Jonderko, K., Buéno, L. Simultaneous assessment of gallbladder emptying in the dog by real-time ultrasonography and strain gauge. J Gastroenterol 32, 222–229 (1997). https://doi.org/10.1007/BF02936372
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DOI: https://doi.org/10.1007/BF02936372