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Dive into the research topics where Ornit Cohen is active.

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Featured researches published by Ornit Cohen.


Gynecological Endocrinology | 2017

Should high BMI be a reason for IVF treatment denial

Shevach Friedler; Ornit Cohen; Gad Liberty; B. Saar-Ryss; Simion Meltzer; Tal Lazer

Abstract Our aim was to examine the influence of BMI on the live-birth rate following IVF/ICSI and evaluate its specific contribution among other factors thus enabling accurate reproductive policy development. All patients that underwent IVF/ICSI at our center during January 2012–July 2015 were included in this retrospective study. A total of 1654 ICSI cycles were divided into four groups according to the patient’s BMI (kg/m2): group I (normal weight): <25 (943 cycles); group II (overweight): 25–30 (403 cycles); group III (obese): 30–35 (212 cycles); group IV (morbid obesity): >35 (96 cycles). Comparing the four groups of BMI, mean age and number of previous ART cycles was significantly lower in group I compared to groups II, III and IV. Length of treatment was significantly shorter in group I compared to groups II, III and IV. Ovarian response to COH was comparable in terms of mean estradiol and progesterone levels on the day of hCG administration mean number of oocytes retrieved, fertilized and number of embryos transferred. Endometrial thickness was significantly lower in group IV. Outcome measures, such as implantation rate, clinical pregnancy rate (CPR) per cycle and per ET, as well as live-birth rates did not differ significantly between the groups, although in group IV LBR per cycle and per ET was lower. Multivariate logistic regression stepwise analysis found a significant correlation between age and BMI but did not find correlation between BMI and clinical pregnancy (p = 0.436) or LB (p = 0.206). The results of our relatively large retrospective study did not demonstrate a significant impact of BMI on the ART cycle outcome. Therefore, BMI should not be a basis for IVF treatment denial.


Journal of Shoulder and Elbow Surgery | 2018

Recurrent rotator cuff tear: is ultrasound imaging reliable?

Ron Gilat; Ehud Atoun; Ornit Cohen; Oren Tsvieli; Ehud Rath; Dror Lakstein; Ofer Levy

BACKGROUND AND HYPOTHESIS The diagnostic workup of the painful shoulder after rotator cuff repair (RCR) can be quite challenging. The aim of this study was to assess the reliability of ultrasonography (US) for the detection of recurrent rotator cuff tears in patients with shoulder pain after RCR. We hypothesized that US for the diagnosis of recurrent rotator cuff tear after RCR would not prove to be reliable when compared with surgical arthroscopic confirmation (gold standard). METHODS In this cohort study (diagnosis), we retrospectively analyzed the data of 39 patients with shoulder pain after arthroscopic RCR who had subsequently undergone US, followed by revision arthroscopy. The rotator cuff was evaluated first using US for the presence of retears. Thereafter, revision arthroscopy was performed, and the diagnosis was either established or disproved. The sensitivity and specificity of US were assessed in reference to revision arthroscopy (gold standard). RESULTS A rotator cuff retear was indicated by US in 21 patients (54%) and by revision arthroscopy in 26 patients (67%). US showed a sensitivity of 80.8% and specificity of 100% in the diagnosis of rotator cuff retears. Omission of partial rotator cuff retears resulted in a spike in sensitivity to 94.7%, with 100% specificity remaining. CONCLUSION US imaging is a highly sensitive and specific test for the detection of recurrent rotator cuff tears, as confirmed by revision arthroscopy, in patients with a painful shoulder after primary RCR.


International Journal of Rheumatology | 2018

The Effect of Prednisone on Tuberculin Skin Test Reaction in Patients with Rheumatoid Arthritis

Olga Reitblat; Tsahi T. Lerman; Ornit Cohen; Tatiana Reitblat

Objectives To assess the correlation between prednisone and methotrexate (MTX) treatment duration and dosage with the TST induration diameter of the TST reaction among rheumatoid arthritis (RA) patients. Method We retrospectively analyzed consecutive cases of RA patients who were TNF-i therapy candidates. TST measurements, prednisone and methotrexate dosages, and treatment durations were recorded. A control group was randomly selected from healthy subjects. We compared TST reaction size between the following three groups: RA patients with current prednisone treatment, RA prednisone naïve patients, and healthy individuals. Results Our study sample comprised 43 RA patients with prednisone treatment, 22 prednisone naïve patients, and 195 healthy subjects. There was no significant difference in mean TST between the groups (5.3±6.6, 7.8±6.2, and 7.6±7.0, respectively, p=0.149). No correlation was noted between TST size and prednisone u-y (r=0.229, p=0.140) or methotrexate u-y in patients with and without prednisone therapy (r=0.219, p=0.158; and r=−0.293, p=0.186, respectively). Conclusions Our results show that the TST reaction size among RA patients may not be affected by prednisone therapy. In addition, the TST reaction of RA patients may present similarly to that of healthy individuals. Therefore, we suggest that the criterion of a TST reaction of 5 mm to define latent TB infection in our population should be reevaluated.


Gynecological Endocrinology | 2018

Does progesterone to oocyte index have a predictive value for IVF outcome? A retrospective cohort and review of the literature

Leonti Grin; Yossi Mizrachi; Ornit Cohen; Tal Lazer; Gad Liberty; Simion Meltcer; Shevach Friedler

Abstract The potential adverse effect of Serum progesterone (SP) elevation on the day of hCG administration is a matter of continued debate. Our study aimed to evaluate the relative value of progesterone to a number of aspirated oocytes ratio (POI) to predict clinical pregnancy (CP) and live birth (LB) in fresh IVF cycles and to review the relevant literature. A retrospective analysis of GnRH Antagonist IVF-ET cycles. POI was calculated by dividing the SP on the day of hCG by the number of aspirated mature oocytes. A multivariate logistic regression analysis was performed to evaluate the predictive value of POI for CP and LB. Cycle outcome parameters included clinical pregnancy, live-birth and miscarriage. A total of 2,693 IVF/ICSI cycles were analyzed. POI was inversely associated with CP adjusted OR 0.063 (95% CI 0.016–0.249, p < .001) and with LB adjusted OR 0.036 (95% CI 0.007–0.199, p < .001). For prediction of LB, the area under the curve (AUC) was 0.68 (95% CI 0.64–0.71, p < .001) for the POI model. POI above the 90th percentile with a value of 0.36 ng/mL/oocyte results in CP and LB rates of 8.0 and 5.9%, respectively. POI is a simple index for the prediction of IVF-ET cycle outcomes, it can advocate a limit above which embryo transfer should be reconsidered.


Europace | 2016

Safety, efficacy, and clinical applicability of pulmonary vein isolation with circular multi-electrode ablation systems: PVAC® vs. nMARQ™ for atrial fibrillation ablation

Avishag Laish-Farkash; Vladimir Khalameizer; Evgeny Fishman; Ornit Cohen; Chaim Yosefy; Iris Cohen; Amos Katz


Journal of Interventional Cardiac Electrophysiology | 2016

Site localization of painful lesions during radiofrequency ablation of pulmonary veins using circular multi-electrode catheters

Avishag Laish-Farkash; Amos Katz; Ornit Cohen; Azriel Osherov; Sharon Bruocha; Vladimir Khalameizer


Archive | 2016

Safety and Feasibility of Contrast Injection During Pulmonary Vein Isolation with the nMARQ™ Multi-Electrode Catheter

Avishag Laish-Farkash; Amos Katz; Ornit Cohen; Evgeny Fishman; Chaim Yosefy; Vladimir Khalameizer


BMC Musculoskeletal Disorders | 2018

Acetabular cup orientation and postoperative leg length discrepancy in patients undergoing elective total hip arthroplasty via a direct anterior and anterolateral approaches

Ronen Debi; Evyatar Slamowicz; Ornit Cohen; Avi Elbaz; Omri Lubovsky; Dror Lakstein; Zachary Tan; Ehud Atoun


Journal of Shoulder and Elbow Surgery | 2017

Intraobserver and interobserver reliability of the Copeland-Levy classification for arthroscopic evaluation of subacromial impingement

Ehud Atoun; Ron Gilat; Alexander Van Tongel; Riten Pradhan; Ornit Cohen; Ehud Rath; Ofer Levy


Journal of Orthopaedic Trauma | 2017

Proximal Femoral Shortening After Cephalomedullary Nail Insertion for Intertrochanteric Fractures.

Ron Gilat; Omri Lubovsky; Ehud Atoun; Ronen Debi; Ornit Cohen; Yoram A. Weil

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Ehud Atoun

Ben-Gurion University of the Negev

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Ronen Debi

Barzilai Medical Center

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Omri Lubovsky

Ben-Gurion University of the Negev

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Ofer Levy

Royal Berkshire Hospital

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Amos Katz

Ben-Gurion University of the Negev

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Avishag Laish-Farkash

Ben-Gurion University of the Negev

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Vladimir Khalameizer

Ben-Gurion University of the Negev

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Boris Yoffe

Barzilai Medical Center

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Chaim Yosefy

Ben-Gurion University of the Negev

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