Avulsion Model
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Avulsion Model




Avulsion Model

We are really excited to now be able to offer the Avulsion models created by Professor Peter Dietz through his research into childbirth related pelvic floor trauma, specifically levator ani avulsion, at the University of Sydney .

We would like to acknowledge his generosity in allowing the use of the images on this page and the copyright of these belong to him.

Please take the time to read Professor Dietz's bio below and for further images and a wealth of educational resources please visit his page

The avulsion models can be used for educational purposes to assist with learning how to palpate an avulsion when assessing your patients. They can also be used to demonstrate to women exactly what an avulsion is if she has been diagnosed with one.

The models are:

  • made of Santoprene
  • beige in colour
  • measure 11.5cm x 9.5cm and 5 cm high


* We aim only to cover our costs with these models and donate back any profit to Prof Dietz's research fund as this will not only benefit us as clinicians but most importantly our patients.


Professor Hans Peter Dietz

Professor Hans Peter Dietz is an Obstetrician and Gynaecologist and RANZCOG-certified subspecialist in Urogynaecology. He was born in Germany and graduated from Heidelberg University in 1988, obtaining an MD there in 1989.  After emigrating to New Zealand in 1990, he arrived in Australia in 1997 and completed FRANCOG (OB/ GYN) training in 1998. Between 1999 and 2002, he undertook urogynaecology subspeciality training in Sydney and obtained a PhD with the University of New South Wales. Since 2008 he is Professor in Obstetrics & Gynaecology at the Nepean campus of Sydney Medical School, University of Sydney, and works as a clinical Urogynaecologist at Nepean Hospital. He’s one of three partners in Sydney Urodynamics, the largest provider of diagnostic services in Urogynaecology in Australasia. 

Professor Dietz’s research focuses on the prevention and treatment of maternal pelvic floor trauma related to childbirth. For over 25 years, he has studied damage to pelvic organ support structures, associated with childbirth, and is recognised for his pioneering research in the field. His research contributions include the rediscovery on ultrasound, of trauma to a muscle that plays a major role in childbirth (the levator ani) occurring as a consequence of vaginal delivery. He has documented findings regarding such trauma during and after labour, identified forceps delivery as the major risk factor for levator trauma, and defined other risk factors such as age at first delivery. His research has established a clear relationship between levator trauma and pelvic organ prolapse and prolapse recurrence after reconstructive surgery. Additionally, he has developed imaging techniques for the evaluation of women with prolapse, obstructed defecation and fecal incontinence. His group has been the first to diagnose and to attempt the repair of levator trauma during labour. Professor Dietz is Editor of the journal Ultrasound in Obstetrics and Gynaecology and Associate Editor of the Australian and New Zealand Journal of Obstetrics and Gynaecology.

The Pelvic Floor Unit at Sydney Medical School Nepean is leading the world in 3D/4D translabial ultrasound, the premier imaging modality in urogynaecology. For further information and resources see: Pelvic Floor Ultrasound - Teaching Resources, a website developed by Professor Dietz to disseminate evidence-based information. The content is available for non-commercial use, provided copyright and authorship are acknowledged.

Professor Dietz’s current research focuses on exploring potential preventative strategies and innovative surgical approaches to prolapse in women with pelvic floor trauma. A more recent interest is the issue of antenatal and intrapartum consent. He is involved in international collaborations with colleagues in Belgium, Germany, New Zealand, the US, Hong Kong and South Africa.

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