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Richard A. Meiss - One of the best experts on this subject based on the ideXlab platform.

  • Persistent mechanical effects of decreasing length during isometric contraction of Ovarian Ligament smooth muscle
    Journal of Muscle Research & Cell Motility, 1993
    Co-Authors: Richard A. Meiss
    Abstract:

    When isometrically-contracting strips of Ovarian Ligament smooth muscle were suddenly shortened by 10–20% of their length, force fell rapidly and then redeveloped along an exponential time course. The amount of force recovered fell short of that expected in an isometric contraction at the new length, and this force deficit was proportional to the magnitude of the length step (approximately 80% of force was recovered after a 10% shortening). A sudden imposed decrease in length was more effective in reducing subsequent force than was isotonic shortening. Early in the recovery phase the stiffness of the muscle was decreased to less than its expected value; stiffness recovered to expected levels on an exponential time course approximately three to four times faster than force recovery itself. Force-velocity curves made during the redevelopment phase showed a reduced maximal force ( F _max) and an increased maximal shortening velocity ( V _max) when compared with control contractions matched in force, time and length. The curves crossed at approximately 10% of F _max. During isometric relaxation the muscles showed an increase in their expected stiffness; prior imposed shortening (as above) reduced the relaxation stiffness increase in proportion to the prior force deficit. The persistent effects of early events on the later phases of the contraction, as well as the increase in shortening velocity with very light loads, are consistent with the hypothesis that the sudden shortening detaches crossbridges and that same fail to reattach during force recovery. During isotonic shortening of unperturbed muscle some slowly-cycling crossbridges may act as an internal load and reduce shortening velocity.

  • Limits to shortening in smooth muscle tissues
    Journal of Muscle Research & Cell Motility, 1992
    Co-Authors: Richard A. Meiss
    Abstract:

    The extent of shortening in smooth muscle tissues is limited by a number of internal and external factors. In this study, continuous measurements of the stiffness of active muscle were made to characterize the mechanical forces acting to limit shortening. Rabbit Ovarian Ligament and mesotubarium superius muscles were allowed to shorten as far as possible under light afterloads; under these conditions a stiffness increase was observed that was closely related to the instantaneous muscle length and that was unaffected by other factors influencing the degree of shortening (afterload, time and intensity of activation, temperature, etc.). The results are considered in terms of a hypothesis relating the tissue-based constraints on radial expansion at short lengths to an additional load on the contractile apparatus, an internal force that is externally manifested as an increase in axial stiffness. Changing the cellular volume by varying the tonicity of the bathing medium provided tentative confirmation of the hypothesis.

Achim Schneider - One of the best experts on this subject based on the ideXlab platform.

  • Laparoscopic-assisted vaginal hysterectomy with lateral transsection of the uterine vessels.
    Surgical endoscopy, 2002
    Co-Authors: Christhardt Köhler, K. Hasenbein, Petra Klemm, Roberto Tozzi, Achim Schneider
    Abstract:

    Background: Increased safety and diminished blood loss are achieved through laparoscopic-assisted vaginal hysterectomy by selective coagulation and transsection of the uterine vessels at their origin. Methods: Three laparoscopic steps are performed: coagulation and transsection of the round Ligament, of the uterine artery at its origin, and of the fallopian tube and Ovarian Ligament or (in BSO) the infundibulopelvic Ligament. The uterine vessels are identified from the pararectal space and, following the internal liliac artery, and the ureter. Hysterectomy is completed transvaginally. Results: Two hundred and sixty-seven patients underwent this procedure. Mean operation time was 121 min, and hemoglobin decreased to 0.6 g/dl by postoperative day 3. It took 8.4 min on average to identify and coagulate the uterine artery. Conclusions: Lateral transsection of the uterine vessels is safe and blood sparing and can be used in patients in whom blood loss must be minimized.

Togas Tulandi - One of the best experts on this subject based on the ideXlab platform.

  • Correlation between the Length of Ovarian Ligament and Ovarian Torsion: A Prospective Study.
    Gynecologic and obstetric investigation, 2018
    Co-Authors: Rina Tamir Yaniv, Ron Schonmann, Regina Agizim, Merav Sharvit, Einat Haikin Herzberger, Yair Daykan, Z. Klein, Togas Tulandi, Amir Wiser
    Abstract:

    Study Objective: The study aimed to evaluate whether there is an association between the Ovarian Ligament length and Ovarian torsion. Design: This is a prospective cohort study. Design Classification: II.2. Setting: The study was conducted in the gynecology department of a university affiliated hospital. Intervention: We measured the length of the Ovarian Ligaments during laparoscopy. Patients: A total of 56 women were recruited, of which 28 women were operated for Ovarian torsion (torsion group) and 28 others for other gynecologic conditions (control group). Measurement and Main Results: The study found correlations between Ovarian Ligament length and Ovarian torsion. The length of the right (2.2 ± 0.6 cm) and left Ovarian Ligament (2.3 ± 0.8 cm) in the control patients were similar. Ovarian torsions occurred mainly on the right side (67.9 %). The right Ovarian Ligament was significantly longer in the torsion group (3.2 ± 0.9 cm) than in the control group (2.2 ± 0.6 cm; p < 0.001). Even after exclusion of patients with Ovarian cyst, the Ovarian Ligament was still significantly longer in the torsion group as compared to the control group (3.2 ± 1.1 vs. 2.2 ± 0.6 cm respectively, p = 0.01). Conclusion: Our results suggest that increased length of Ovarian Ligament might be correlated with the development of Ovarian torsion. This could be a basis for Ovarian Ligament fixation or oophoropexy at the time of conservative surgery for Ovarian torsion.

  • Laparoscopic Ovarian suspension before irradiation
    Fertility and sterility, 1998
    Co-Authors: Togas Tulandi, Sundus Al-took
    Abstract:

    Abstract Objective: To evaluate a technique of lateral Ovarian transposition by laparoscopy. Design: Case report. Setting: Tertiary care center. Patient(s): A 34-year-old woman with rectal carcinoma. Intervention(s): Laparoscopic Ovarian transposition. Main Outcome Measure(s): Return of normal menstruation after irradiation. Result(s): Lateral Ovarian transposition could be done by laparoscopy. However, division of the Ovarian Ligament was needed. The location of the ovaries after surgery was outside the radiation field. Conclusion(s): Lateral Ovarian transposition can be done by laparoscopy. Contrary to a previous report, division of the Ovarian Ligament is required.

  • Laparoscopic Ovarian suspension prior to radiation VIDEO
    1998
    Co-Authors: Togas Tulandi
    Abstract:

    Radiotherapy is one of the treatment modalities in the management of patients with cancer. It is highly effective in women with early stages of malignancy but it results in the loss of Ovarian function. One of the methods which can be used to preserve Ovarian function is laparoscopic‐Ovarian suspension. Lateral Ovarian transposition by laparoscopy is associated with preservation of Ovarian function in 83% of cases after pelvic radiation whereas Ovarian transposition by laparotomy is associated with considerable abdominal incision, long hospital stay and increased risk of adhesion formation. In this video a laparoscopic technique of Ovarian transposition in a young woman with rectal carcinoma prior to radiation therapy is described. The ovaries were transposed laterally and anteriorly outside the field of radiation. The steps involved are outlined. First, division of the Ovarian Ligament separating it from the uterus; second, freeing the ovary from the surrounding tissue. Third, relaxing incision inferior to the ovary may be needed to free it. A piece of the ovary may be removed for cryopreservation (Nugent et al., 1997). The patient’s menstrual cycles were never interrupted and she continued to menstruate regularly every 28 days (Tulandi and Al-Took, 1998).

Youngse Park - One of the best experts on this subject based on the ideXlab platform.

  • Acute abdomen due to Ovarian congestion caused by coiling of the fallopian tube accompanied by paratubal cyst around the utero-Ovarian Ligament.
    Obstetrics & gynecology science, 2014
    Co-Authors: Daehyun Park, Hyangjin Jeong, Youngse Park
    Abstract:

    Torsion of uterine adnexa is an important cause of acute abdominal pain in females. The main organ which can cause torsion is the ovaries, but torsions of the fallopian tube, subserosal myoma, paratubal cyst, and even the uterine body have been reported. The incidence of isolated fallopian tubal torsion is very rare. Even more rarely, it can coil around nearby organs such as the utero-Ovarian Ligament, showing similar clinical manifestations with those of adnexal torsion. We experienced an extremely rare case of acute abdomen induced by Ovarian congestion triggered by the fallopian tube accompanying a paratubal cyst coiling around the utero-Ovarian Ligament. The right paratubal cyst was misinterpreted as being part of a cystic component of the left ovary on preoperative sonographic examination, and the coiling of the right fallopian tube accompanying the paratubal cyst was misdiagnosed as torsion of the right ovary. We report this rare case with a brief literature review.

M. Tosun - One of the best experts on this subject based on the ideXlab platform.