Prof.Dr. AHMET TEVFİK YOLDEMİR

Atasayan K., YOLDEMİR A. T.

Climacteric : the journal of the International Menopause Society, cilt.23, ss.423-425, 2020 (SCI Expanded İndekslerine Giren Dergi)

The evaluation of ventricular functions by speckle tracking echocardiography in preeclamptic patients

Paudel A., Tigen K., YOLDEMİR A. T. , Guclu M., YILDIZ İ. , Cincin A., et al.

INTERNATIONAL JOURNAL OF CARDIOVASCULAR IMAGING, cilt.36, ss.1689-1694, 2020 (SCI İndekslerine Giren Dergi)

The effect of PCOS status on atherosclerosis markers and cardiovascular disease risk factors in young women with vitamin D deficiency

GYNECOLOGICAL ENDOCRINOLOGY, 2020 (SCI İndekslerine Giren Dergi)

The effects of progesterone treatment on nuchal translucency in women with threatened miscarriage

Karadag C., Yoldemir T. , Demircan S., caliskan E.

JOURNAL OF OBSTETRICS AND GYNAECOLOGY, 2020 (SCI İndekslerine Giren Dergi)

Adenomyosis and fertility outcomes

UĞURLU M. Ü. , Yoldemir T. , Gulluoglu B.

GYNECOLOGICAL ENDOCRINOLOGY, cilt.36, ss.473-474, 2020 (SCI İndekslerine Giren Dergi)

The effects of endometrioma size and bilaterality on ovarian reserve

Karadag C., Yoldemir T. , Karadag S. D. , TURGUT A.

JOURNAL OF OBSTETRICS AND GYNAECOLOGY, cilt.40, ss.531-536, 2020 (SCI İndekslerine Giren Dergi)

Sexual function through decades: association with androgens and cardiometabolic features.

Yoldemir T. , Garibova N., Atasayan K.

Climacteric : the journal of the International Menopause Society, ss.1-7, 2020 (SCI İndekslerine Giren Dergi)

Assessment and management of B3 breast lesions with atypia: a focused review.

Climacteric : the journal of the International Menopause Society, cilt.23, ss.17-23, 2020 (SCI Expanded İndekslerine Giren Dergi)

Artificial intelligence and women's health

Uygur M. M. , Yoldemir T. , Yavuz D. G.

Climacteric : the journal of the International Menopause Society, cilt.23, ss.1-2, 2020 (SCI İndekslerine Giren Dergi)

Relation of NT-probnp levels and cardiovascular disease risk factors in lean women with polycystic ovary syndrome

Karadag C., Yoldemir T.

JOURNAL OF OBSTETRICS AND GYNAECOLOGY, cilt.39, ss.1154-1159, 2019 (SCI İndekslerine Giren Dergi)

The association between sexual dysfunction and metabolic syndrome among Turkish postmenopausal women

Yoldemir T. , Garibova N., Atasayan K.

CLIMACTERIC, cilt.22, ss.472-477, 2019 (SCI İndekslerine Giren Dergi)

Quality of life among infertile PCOS patients

Angin P., Yoldemir T. , Atasayan K.

ARCHIVES OF GYNECOLOGY AND OBSTETRICS, cilt.300, ss.461-467, 2019 (SCI İndekslerine Giren Dergi)

Delayed cord clamping in term large-for-gestational age infants: A prospective randomised study

Vural I., Ozdemir H., Teker G., Yoldemir T. , Bilgen H. S. , Özek E.

JOURNAL OF PAEDIATRICS AND CHILD HEALTH, cilt.55, ss.555-560, 2019 (SCI İndekslerine Giren Dergi)

Thyroid disease in the perimenopause and postmenopause period

CLIMACTERIC, cilt.21, ss.542-548, 2018 (SCI İndekslerine Giren Dergi)

Effects of vitamin D supplementation on insulin sensitivity and androgen levels in vitamin-D-deficient polycystic ovary syndrome patients

Karadag C., Yoldemir T. , YAVUZ D.

JOURNAL OF OBSTETRICS AND GYNAECOLOGY RESEARCH, cilt.44, ss.270-277, 2018 (SCI İndekslerine Giren Dergi)

Surgical challenges in the treatment of perimenopausal and postmenopausal endometriosis

Ozyurek E. S. , Yoldemir T. , Kalkan U.

CLIMACTERIC, cilt.21, ss.385-390, 2018 (SCI İndekslerine Giren Dergi)

Quality of life for women with endometriosis: premenopausal and postmenopausal perspectives

YILDIZ İNANICI S. , İNANICI M. A. , YOLDEMİR A. T.

CLIMACTERIC, cilt.21, ss.411-412, 2018 (SCI İndekslerine Giren Dergi)

Does cardiovascular risk vary according to the criteria for a diagnosis of polycystic ovary syndrome?

Ramoglu S., Yoldemir T. , Atasayan K., YAVUZ D.

JOURNAL OF OBSTETRICS AND GYNAECOLOGY RESEARCH, cilt.43, ss.1848-1854, 2017 (SCI İndekslerine Giren Dergi)

Obstetric outcomes of recurrent pregnancy loss patients diagnosed with inherited thrombophilia

Karadag C., Yoldemir T. , Karadag S. D. , Inan C., Dolgun Z. N. , Aslanova L.

IRISH JOURNAL OF MEDICAL SCIENCE, cilt.186, ss.707-713, 2017 (SCI İndekslerine Giren Dergi)

The evaluation of ventricular functions by speckle tracking echocardiography in preeclamptic patients

Tigen K., Paudel A., Sadic B. , Guclu M., Yoldemir T. , Yildiz I., et al.

EUROPEAN HEART JOURNAL, cilt.38, ss.1093, 2017 (SCI İndekslerine Giren Dergi)

The relationship between subjective experience of childhood abuse and neglect and depressive symptoms during pregnancy

JOURNAL OF FORENSIC AND LEGAL MEDICINE, cilt.49, ss.76-80, 2017 (SCI İndekslerine Giren Dergi)

Evaluation of sacroiliac joint MRI for pelvic venous congestion signs in women clinically suspected of sacroiliitis

Cimsit C., Yoldemir T. , Tureli D. , Aribal M. E.

ACTA RADIOLOGICA, cilt.58, ss.849-855, 2017 (SCI İndekslerine Giren Dergi)

Androstenedione response to recombinant human FSH is the most valid predictor of the number of selected follicles in polycystic ovarian syndrome: (a case-control study)

Ozyurek E. S. , Yoldemir T. , Artar G.

JOURNAL OF OVARIAN RESEARCH, cilt.10, 2017 (SCI İndekslerine Giren Dergi)

Determinants of low bone mineral density in premenopausal polycystic ovary syndrome patients

Karadag C., Yoldemir T. , YAVUZ D.

GYNECOLOGICAL ENDOCRINOLOGY, cilt.33, ss.234-237, 2017 (SCI İndekslerine Giren Dergi)

Decreasing the Uterine Blood Flow with Electroacupuncture: Bidermatomal and Monodermatomal Applications

Cakmak Y. O. , Akpinar I. N. , Yoldemir T.

GYNECOLOGIC AND OBSTETRIC INVESTIGATION, cilt.82, ss.151-156, 2017 (SCI İndekslerine Giren Dergi)

Native tissue repair versus mesh repair in pelvic organ prolapse surgery

Kalkan U., Yoldemir T. , Ozyurek E. S. , Daniilidis A.

CLIMACTERIC, cilt.20, ss.510-517, 2017 (SCI İndekslerine Giren Dergi)

Prevalence of dynamic magnetic resonance imaging-identified pelvic organ prolapse in pre- and postmenopausal women without clinically evident pelvic organ descent

ACTA RADIOLOGICA, cilt.57, ss.1418-1424, 2016 (SCI İndekslerine Giren Dergi)

The evaluation of endothelial function and structure in hirsute patients in reproductive age

Atasayan K., Yoldemir T. , Ramoglu S., YAVUZ D.

EUROPEAN JOURNAL OF OBSTETRICS & GYNECOLOGY AND REPRODUCTIVE BIOLOGY, cilt.206, ss.208-212, 2016 (SCI İndekslerine Giren Dergi)

Susceptibility-weighted magnetic resonance imaging for the evaluation of deep infiltrating endometriosis: preliminary results

Cimsit C., Yoldemir T. , Guclu M., Akpinar I. N.

ACTA RADIOLOGICA, cilt.57, ss.878-885, 2016 (SCI İndekslerine Giren Dergi)

Sciatic neuroendometriosis: Magnetic resonance imaging defined perineural spread of endometriosis

JOURNAL OF OBSTETRICS AND GYNAECOLOGY RESEARCH, cilt.42, ss.890-894, 2016 (SCI İndekslerine Giren Dergi)

Fertility in midlife women

Yoldemir T. , Yavuz D. G.

CLIMACTERIC, cilt.19, ss.240-246, 2016 (SCI İndekslerine Giren Dergi)

Iodine status of pregnant women in a metropolitan city which proved to be an iodine-sufficient area. Is mandatory salt iodisation enough for pregnant women?

Oral E., Mathyk B. A. , Aydogan B. I. , Acikgoz A. S. , Erenel H., Acioglu H. C. , et al.

GYNECOLOGICAL ENDOCRINOLOGY, cilt.32, ss.188-192, 2016 (SCI İndekslerine Giren Dergi)

Association of serum paraoxonase concentration with serum lipid levels and bone mineral density measurements in early postmenopausal women

CLIMACTERIC, cilt.18, ss.405-410, 2015 (SCI İndekslerine Giren Dergi)

Strain elastography in placental dysfunction: placental elasticity differences in normal and preeclamptic pregnancies in the second trimester

ARCHIVES OF GYNECOLOGY AND OBSTETRICS, cilt.291, ss.811-817, 2015 (SCI İndekslerine Giren Dergi)

The effect of Momordica charantia intake on the estrogen receptors ESRα/ESRβ gene levels and apoptosis on uterine tissue in ovariectomy rats.

ÇEVİK Ö., Akpinar H., OBA R. , Cilingir O. T. , Ozdemir Z. N. , ÇETİNEL Ş. , et al.

Molecular biology reports, cilt.42, ss.167-77, 2015 (SCI Expanded İndekslerine Giren Dergi)

Shear Wave Elastography in Placental Dysfunction Comparison of Elasticity Values in Normal and Preeclamptic Pregnancies in the Second Trimester

Yoldemir T. , Yavuz D. G.

JOURNAL OF ULTRASOUND IN MEDICINE, cilt.34, ss.151-159, 2015 (SCI İndekslerine Giren Dergi)

The association of osteopenia with levels of serum 25-hydroxyvitamin D and HOMA-IR values

CLIMACTERIC, cilt.17, ss.268-272, 2014 (SCI İndekslerine Giren Dergi)

Fatty necrosis of a mesenteric cyst in a woman initially diagnosed with a large ovarian cystic mass

JOURNAL OF OBSTETRICS AND GYNAECOLOGY, cilt.33, ss.534-535, 2013 (SCI İndekslerine Giren Dergi)

The impact of serum FSH and estradiol on postmenopausal osteoporosis related to time since menopause

Yoldemir T. , Erenus M., Durmusoglu F.

GYNECOLOGICAL ENDOCRINOLOGY, cilt.28, ss.884-888, 2012 (SCI İndekslerine Giren Dergi)

The prevalence of metabolic syndrome in pre- and post-menopausal women attending a tertiary clinic in Turkey

EUROPEAN JOURNAL OF OBSTETRICS & GYNECOLOGY AND REPRODUCTIVE BIOLOGY, cilt.164, ss.172-175, 2012 (SCI İndekslerine Giren Dergi)

Estrogen receptor gene polymorphisms in a group of postmenopausal Turkish women: association with bone mineral density

Yavuz D. G. , Yoldemir T. , Ozaltun K., Erenus M.

CLIMACTERIC, cilt.15, ss.368-373, 2012 (SCI İndekslerine Giren Dergi)

Has fertility declined in recent decades?

Yoldemir T. , Oral E.

CURRENT OPINION IN OBSTETRICS & GYNECOLOGY, cilt.24, ss.119-126, 2012 (SCI İndekslerine Giren Dergi)

The impact of metabolic syndrome on bone mineral density in postmenopausal women

GYNECOLOGICAL ENDOCRINOLOGY, cilt.28, ss.391-395, 2012 (SCI İndekslerine Giren Dergi)

Decreasing bleeding due to uterine fibroid with electroacupuncture

Cakmak Y. O. , Akpinar I. N. , Yoldemir T. , Cavdar S.

FERTILITY AND STERILITY, cilt.96, 2011 (SCI İndekslerine Giren Dergi)

Vitamin D receptor gene polymorphisms in a group of postmenopausal Turkish women: association with bone mineral density

Yoldemir T. , Yavuz D. G. , Anik G. , Verimli N., Erenus M.

CLIMACTERIC, cilt.14, ss.384-391, 2011 (SCI İndekslerine Giren Dergi)

Does the timing of mock embryo transfer trial improve implantation in intracytoplasmic sperm injection cycles?

GYNECOLOGICAL ENDOCRINOLOGY, cilt.27, ss.396-400, 2011 (SCI İndekslerine Giren Dergi)

Follicular dominance on the fifth day of controlled ovarian stimulation reduces implantation in long down-regulated ICSI cycles

Yoldemir T. , Erenus M., Durmusoglu F.

EUROPEAN JOURNAL OF OBSTETRICS & GYNECOLOGY AND REPRODUCTIVE BIOLOGY, cilt.156, ss.186-189, 2011 (SCI İndekslerine Giren Dergi)

Should we consider assessment of bone mineral density earlier in postmenopausal women with pelvic organ prolapse?

Yoldemir T. , Fraser I. S.

CLIMACTERIC, cilt.14, ss.392-397, 2011 (SCI İndekslerine Giren Dergi)

Prevalence of HPV infection by cytologic diagnosis and HPV DNA extraction and prevalence of the HPV genotypes detected in urban Turkish women

Eren F., Erenus M., Bas E., Ahiskali R., Yoldemir T.

INTERNATIONAL JOURNAL OF GYNECOLOGY & OBSTETRICS, cilt.109, ss.235-238, 2010 (SCI İndekslerine Giren Dergi)

The effect of retrieved oocyte count on pregnancy outcomes in an assisted reproduction program

ARCHIVES OF GYNECOLOGY AND OBSTETRICS, cilt.281, ss.551-556, 2010 (SCI İndekslerine Giren Dergi)

Assessment of bone mineral density should be considered earlier in perimenopausal women with vasomotor symptoms

Tural A., Yoldemir T. , Erenus M.

INTERNATIONAL JOURNAL OF GYNECOLOGY & OBSTETRICS, cilt.107, ss.114-116, 2009 (SCI İndekslerine Giren Dergi)

The effect of elevated serum estradiol levels on the day of human chorionic gonadotropin injection on pregnancy outcomes in an assisted reproduction program

Yoldemir T. , Fraser I. S.

AUSTRALIAN & NEW ZEALAND JOURNAL OF OBSTETRICS & GYNAECOLOGY, cilt.49, ss.545-550, 2009 (SCI İndekslerine Giren Dergi)

The impact of tibolone and hormone therapy on serum C-reactive protein, tumor necrosis factor- and hepatocyte growth factor in postmenopausal women

Oezer K. S. , Erenus M., Yoldemir T.

CLIMACTERIC, cilt.12, ss.66-71, 2009 (SCI İndekslerine Giren Dergi)

Predictivity of uterine artery, arcuate artery, and intraovarian artery Doppler indices measured on the day of human chorionic gonadotropin injection on pregnancy outcomes

Adakan S., Yoldemir T. , Tavmergen E., Goker E., Killi R.

FERTILITY AND STERILITY, cilt.84, ss.529-532, 2005 (SCI İndekslerine Giren Dergi)

Effect of daily hormone therapy and alendronate use on bone mineral density in postmenopausal women

Davas I., Altintas A., Yoldemir T. , Varolan A., Yazgan A., Baksu B.

FERTILITY AND STERILITY, cilt.80, ss.536-540, 2003 (SCI İndekslerine Giren Dergi)

Comparison of the reduction of postoperative adhesions by two barriers, one solution, and two pharmacologic agents in the rat uterine model

Yoldemir T. , Sagol S., Adakan S., Oztekin K., Ozsener S., Karadadas N.

FERTILITY AND STERILITY, cilt.78, ss.335-339, 2002 (SCI İndekslerine Giren Dergi)

Diğer Dergilerde Yayınlanan Makaleler

The Effects of Anesthesiologist on Anxiety Level in Patients Undergoing In-Vitro-Fertilization Therapy.

ÖZTÜRK G., MELEK E. C. , ÖTEGEN A., KAHRAMAN B., İLGİN C., YOLDEMİR A. T. , et al.

Clinics in Medicine, 2019 (Diğer Kurumların Hakemli Dergileri)

Struma Ovari: 3. Basamak bir merkezin 3 yıllık deneyimi

Soysal S. , Yoldemir A. T.

Zeynep Kamil Tıp Bülteni, cilt.50, no.50, ss.146-148, 2019 (Diğer Kurumların Hakemli Dergileri)

A giant extra-uterine fibroma originating from an utero-ovarian ligament initially diagnosed as an ovarian tumour

YOLDEMİR A. T. , ATASAYAN K., ERASLAN A.

Marmara Medical Journal (elektronik), ss.132-133, 2018 (Diğer Kurumların Hakemli Dergileri)

“Effects of the Factors Determining the Online Purchase Behavior of The Consumer on Actual Purchase

ERDEM Ş. , YOLDEMİR A. T. , AYSUNA TÜRKYILMAZ C.

Journal of Marketing and Consumer Research., ss.19-31, 2017 (Diğer Kurumların Hakemli Dergileri)

Isolated tubal torsion in a woman who had laparoscopic tuballigation by bipolar electrocoagulation

YOLDEMİR A. T. , erenus m.

Marmara Medical Journal, 2013 (Diğer Kurumların Hakemli Dergileri)

ART Hamilelikleri Sırasında Oluşan Over Torsiyonu nun Başarılı Tedavisi İlk ve İkinci Trimestr Yaklaşımları

YOLDEMİR A. T. , erenus m.

Causapedia, 2012 (Diğer Kurumların Hakemli Dergileri)

Does Fsh lh Ratio In The Serum On The Third Day Of The Cycle Predict Icsi Success In Women With Normal Day 3 Fsh Levels

MARMARA MEDICAL JOURNAL, 2012 (Diğer Kurumların Hakemli Dergileri)

Does Peri follicular Blood Flow On The Day Of Ovum Pick up Predict The Likelihood Of Retrieving An Oocyte

YOLDEMİR A. T. , erenus m.

MARMARA MEDICAL JOURNAL, 2012 (Diğer Kurumların Hakemli Dergileri)

The Persistence And Clearence Rate Of Hpv Genotypes In Urban Turkish Women After One Year

YOLDEMİR A. T. , erenus m., EREN Ş. F.

MARMARA MEDICAL JOURNAL, 2011 (Diğer Kurumların Hakemli Dergileri)

Hakemli Kongre / Sempozyum Bildiri Kitaplarında Yer Alan Yayınlar

Laparoscopic management of left endometrioma extending over to the left external iliac artery in a woman who had previous total laparoscopic hysterectomy (TLH)

ESGE 28. Annual Congress, 6 - 09 Ekim 2019

Depression through decades: association with female sexual function

12th European Congress on Menopause and Andropause, 15 - 17 Mayıs 2019

Comorbidity: Cerebrovascular disease

12th European Congress on Menopause and Andropause, 15 - 17 Mayıs 2019

Comorbidity: Endometriosis

YOLDEMİR A. T. , Yassa M.

12th European Congress on Menopause and Andropause, 15 - 17 Mayıs 2019

Comparison of depression between primary and secondary infertile couples

12th European Congress on Menopause and Andropause, 15 - 17 Mayıs 2019

Konjental viral enfeksiyonlar

7. ULUSLARARASI FETAL HAYATTAN ÇOCUKLUĞA İLK 1000 GÜN ANNE - ÇOCUK - BESLENME KONGRESİ, 27 - 30 Mart 2019

Prematur Ovaryen Yetmezlik

TJOD Istanbul Aralik Toplantisi, Türkiye, 23 Aralık - 23 Kasım 2018

Left pelvic kidney and extrinsic ureteral endometriosis

47th Global Congress on MIGS, 11 - 15 Kasım 2018

Fertility Options after 40

16th World Congress on Menopause, 6 - 09 Haziran 2018

Female sexual function through decades: Association with androgens and cardiometabolic features

16th World Congress on Menopause, 06 Haziran 2018

Fibroids Fertility: To operate or not?

16th World Congress on Menopause, 6 - 09 Haziran 2018

Endometriosis beyond late reproductive age

16th World Congress on Menopause, 6 - 09 Haziran 2018

Yiyeceklerdeki Fitokimyasalların Potansiyel Bir Moderatör Olan Epigenoma Etkileri.

YOLDEMİR A. T. , Garibova N.

6. Uluslararası Fetal Hayattan Çocukluğa ”ilk 1000 gün” Gebe-Çocuk-Beslenme Kongresi, 14 - 18 Mart 2018

The evaluation of ventricular functions by speckle trackingechocardiography in preeclamptic patients.

TİGEN M. K. , Paudel A., ÖZBEN SADIÇ B. , Güçlü M., YOLDEMİR A. T. , YILDIZ İ. , et al.

33nd Turkish Cardiology Congress With International Participation, 5 - 08 Ekim 2017

CHILDHOOD ABUSE HISTORY AND PARENTING-EFFICACY IN PREGNANT WOMEN: ATTACHMENT AND THEORY OF MIND

YILDIZ İNANICI S. , İNANICI M. A. , YOLDEMİR A. T. , Akgun B., Karatas H. O. , Aksoy S., et al.

21st Triennial Meeting of the International-Association-of-Forensic-Sciences (IAFS), Toronto, Kanada, 21 - 25 Ağustos 2017, cilt.277, ss.199

Health related quality of life in women with PCOS

YOLDEMİR A. T. , angın p., ramoğlu s., atasayan k.

11th Congress of the European Menopause and Andropause Society, 22 Mayıs 2107 - 24 Mayıs 2017

The association between sexual dysfunction and metabolic syndrome among Turkish postmenopausal women

11th Congress of the European Menopause and Andropause Society, 22 - 24 Mayıs 2017

Does cardiovascular risk vary according to the criteria for the diagnosis of PCOS?

YOLDEMİR A. T. , ramoğlu s., atasayan k.

11th Congress of the European Menopause and Andropause Society, 22 - 24 Mayıs 2017

Adhesion Prevention

5th South Eastern European Robotic Surgery Society Congress, 15 - 18 Aralık 2016

Obez gebelerde obstetrik sorunlar

7.Ulusal Obesite Kongresi, Türkiye, 8 - 11 Aralık 2016

PGS endikasyonları nelerdir Hangi aşamada PGS kararı alınmalı

YOLDEMİR A. T. , Garibova N.

7.Ulusal Üreme Endokrinolojisi ve İnfertilite Kongresi, Türkiye, 17 - 20 Kasım 2016

Gebelerde Çocukluk Çağı İstismar Öyküsü ve Anneliğe Dair Kaygı Düzeyleri Arasındaki İlişkinin Bağlanma ve Zihin Teoremleri Açısından İncelenmesi

YILDIZ S., İNANICI M. A. , YOLDEMİR A. T. , AKGÜN B., GHALOMİBAROUGHİ M., AKGÖBEK Z., et al.

II. ULUSLARARASI ÇOCUK KORUMA KONGRESİ, Ankara, Türkiye, 11 - 13 Kasım 2016

The prevalance of sexual dysfunction among Turkish postmenopousal women and to define the association between sexual dysfunction and depression

IMS 15th World Congress on Menopause, 28 Eylül - 01 Ekim 2016

Correlation of incontinence symptoms with dynamic MRI defined POP findings in women without clinically evident pelvic organ descent

cimşit c., YOLDEMİR A. T. , AKPINAR İ. N.

European Society of Urogenital Radiology, 15 - 18 Eylül 2016

Evaluation of sacroiliac joint MRI for pelvic venous congestion signs in women clinically suspected of sacroiliac joint disorder

cimşit c., YOLDEMİR A. T. , ARIBAL M. E.

European Society of Urogenital Radiology, 15 - 18 Eylül 2016

Childhood abuse and neglect as predictors for prenatal depression

YILDIZ S., İNANICI M. A. , YOLDEMİR A. T.

IALM Intersocietal Symposium, 21 - 24 Haziran 2016

The effect of the initiation of gonadotrophin rFSH treatment and antral follicule quantities on monofolliculler development

YOLDEMİR A. T. , ohan h.

Excellence in ART Clinical and Laboratory Perspectives, 29 - 30 Nisan 2016

Hiperresponder IVF protokolleri

6. Jinekolojik Endoskopi Sempozyum ve Çalıştayı, Türkiye, 6 - 09 Mart 2016

Adneksiyal kitlelerde laparoskopik cerrahi