Reproducibility of urethral pressure profiles in clinically normal sexually intact female dogs by use of microtransducer catheters

Susi Arnold From the Departments of Reproduction (Arnold, Hubler, Casal, Ruesch) and Surgery (Wiestner, Hogg, Heckmann), Veterinary Medical Faculty of Zurich, Winterthurerstrasse 260, 8057 Zurich, Switzerland, and the Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, 601 Vernon L. Tharp St, Columbus, OH 43210-1089 (Chew, Powers)

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Dennis J. Chew From the Departments of Reproduction (Arnold, Hubler, Casal, Ruesch) and Surgery (Wiestner, Hogg, Heckmann), Veterinary Medical Faculty of Zurich, Winterthurerstrasse 260, 8057 Zurich, Switzerland, and the Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, 601 Vernon L. Tharp St, Columbus, OH 43210-1089 (Chew, Powers)

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Madeleine Hubler From the Departments of Reproduction (Arnold, Hubler, Casal, Ruesch) and Surgery (Wiestner, Hogg, Heckmann), Veterinary Medical Faculty of Zurich, Winterthurerstrasse 260, 8057 Zurich, Switzerland, and the Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, 601 Vernon L. Tharp St, Columbus, OH 43210-1089 (Chew, Powers)

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Margret Casal From the Departments of Reproduction (Arnold, Hubler, Casal, Ruesch) and Surgery (Wiestner, Hogg, Heckmann), Veterinary Medical Faculty of Zurich, Winterthurerstrasse 260, 8057 Zurich, Switzerland, and the Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, 601 Vernon L. Tharp St, Columbus, OH 43210-1089 (Chew, Powers)

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Thomas Wiestner From the Departments of Reproduction (Arnold, Hubler, Casal, Ruesch) and Surgery (Wiestner, Hogg, Heckmann), Veterinary Medical Faculty of Zurich, Winterthurerstrasse 260, 8057 Zurich, Switzerland, and the Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, 601 Vernon L. Tharp St, Columbus, OH 43210-1089 (Chew, Powers)

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Hermann Hogg From the Departments of Reproduction (Arnold, Hubler, Casal, Ruesch) and Surgery (Wiestner, Hogg, Heckmann), Veterinary Medical Faculty of Zurich, Winterthurerstrasse 260, 8057 Zurich, Switzerland, and the Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, 601 Vernon L. Tharp St, Columbus, OH 43210-1089 (Chew, Powers)

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Rudolf Heckmann From the Departments of Reproduction (Arnold, Hubler, Casal, Ruesch) and Surgery (Wiestner, Hogg, Heckmann), Veterinary Medical Faculty of Zurich, Winterthurerstrasse 260, 8057 Zurich, Switzerland, and the Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, 601 Vernon L. Tharp St, Columbus, OH 43210-1089 (Chew, Powers)

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Jean Powers From the Departments of Reproduction (Arnold, Hubler, Casal, Ruesch) and Surgery (Wiestner, Hogg, Heckmann), Veterinary Medical Faculty of Zurich, Winterthurerstrasse 260, 8057 Zurich, Switzerland, and the Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, 601 Vernon L. Tharp St, Columbus, OH 43210-1089 (Chew, Powers)

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Peter Ruesch From the Departments of Reproduction (Arnold, Hubler, Casal, Ruesch) and Surgery (Wiestner, Hogg, Heckmann), Veterinary Medical Faculty of Zurich, Winterthurerstrasse 260, 8057 Zurich, Switzerland, and the Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, 601 Vernon L. Tharp St, Columbus, OH 43210-1089 (Chew, Powers)

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Summary

Urethral pressures profiles (upp) obtained by use of microtransducer catheters were determined in 8 anestrous sexually intact female Beagles during general anesthesia. A upp study consisted of 3 consecutive recordings, and 4 upp studies were repeated at an interval of 5 days in each dog. Maximal urethral pressure (cm of H2O), bladder pressure (cm of H2O), and anatomic urethral length (cm) were recorded. Maximal urethral closure pressure (cm of H2O) was calculated.

Mean ± sd (for all measurements) maximal urethral closure pressure was 12.8 ± 5.6 cm of H2O (range, 2.4 to 25.2 cm of H2O). Maximal urethral closure pressure was significantly (P < 0.05) decreased during the first recording period (11.4 ± 5.8 cm of H2O), compared with the second (13.0 ± 5.2 cm of H2O) or third (14.1 ± 5.7 cm of H2O) recording periods within a upp study (3 consecutive recordings). Mean maximal difference in urethral closure pressure during a single upp study was 4.8 ± 2.4 cm of H2O. Significant difference in maximal urethral closure pressure was not observed between studies.

Mean (for all measurements) anatomic urethral length was 6.2 ± 0.9 cm (4.1 to 7.8 cm). Anatomic urethral length was significantly (P < 0.05) less during the first recording period (6.1 ± 0.9 cm), compared with values for the second and third periods (6.3 ± 0.9cm, 6.4 ± 0.9 cm respectively). Anatomic urethral length for time 3 was significantly (P < 0.05) less than the value for time 1 (5.8 ± 0.7 cm vs 6.6 ± 0.8 cm).

We conclude that the microtransducer catheter technique for measurement of upp was reproducible during a single study and between successive studies.

This method is useful in documenting maximal urethral pressure, maximal urethral closure pressure, and anatomic urethral length in clinically normal sexually intact female dogs.

Summary

Urethral pressures profiles (upp) obtained by use of microtransducer catheters were determined in 8 anestrous sexually intact female Beagles during general anesthesia. A upp study consisted of 3 consecutive recordings, and 4 upp studies were repeated at an interval of 5 days in each dog. Maximal urethral pressure (cm of H2O), bladder pressure (cm of H2O), and anatomic urethral length (cm) were recorded. Maximal urethral closure pressure (cm of H2O) was calculated.

Mean ± sd (for all measurements) maximal urethral closure pressure was 12.8 ± 5.6 cm of H2O (range, 2.4 to 25.2 cm of H2O). Maximal urethral closure pressure was significantly (P < 0.05) decreased during the first recording period (11.4 ± 5.8 cm of H2O), compared with the second (13.0 ± 5.2 cm of H2O) or third (14.1 ± 5.7 cm of H2O) recording periods within a upp study (3 consecutive recordings). Mean maximal difference in urethral closure pressure during a single upp study was 4.8 ± 2.4 cm of H2O. Significant difference in maximal urethral closure pressure was not observed between studies.

Mean (for all measurements) anatomic urethral length was 6.2 ± 0.9 cm (4.1 to 7.8 cm). Anatomic urethral length was significantly (P < 0.05) less during the first recording period (6.1 ± 0.9 cm), compared with values for the second and third periods (6.3 ± 0.9cm, 6.4 ± 0.9 cm respectively). Anatomic urethral length for time 3 was significantly (P < 0.05) less than the value for time 1 (5.8 ± 0.7 cm vs 6.6 ± 0.8 cm).

We conclude that the microtransducer catheter technique for measurement of upp was reproducible during a single study and between successive studies.

This method is useful in documenting maximal urethral pressure, maximal urethral closure pressure, and anatomic urethral length in clinically normal sexually intact female dogs.

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