for clinicians
ASISU™ is designed to be used by you to support perineal protection during childbirth. Learn about the perineal protection device ASISU™ below.
This page is intended for healthcare professionals. If you are not a healthcare professional, please refer to the general information pages or contact your healthcare provider for advice. ASISU™ may not currently be available in your country.
Introducing ASISU™
- a perineal protection device intended for vaginal births
Designed for safe and easy integration into existing workflows.
ASISU™ is a medical device intended for use by qualified birth attendants during the second stage of vaginal childbirth, particularly during the crowning phase. The device consists of an internal part positioned in the vaginal canal under the fetal head and an external part placed on the perineal skin, connected by a flexible neck at the posterior fourchette. The device provides mechanical support to the perineum and helps distribute forces during fetal head expulsion with the aim of reducing the risk of perineal tears. The device is supplied ready to use in a pouch allowing visual inspection before opening.
Developed with midwives for real maternity care.
Innovation in childbirth must work in the realities that you experience in the delivery room. ASISU™ has therefore been developed in close collaboration between midwives, other clinicians, hospitals and oasicare to improve feasibility that the device fits into maternity care and continued standard practices.
Clinical & strategic collaborations
ASISU™ is intended to protect the perineum during the second stage of vaginal childbirth.
The technology behind ASISU™
Protection inside the vaginal canal.
The internal part of the ASISU™ device is designed to spread the forces of the fetal head on the posterior vaginal canal. The internal part is designed to be easily inserted between the fetal head and posterior vaginal wall.
Internal part:
Supporting controlled perineal expansion & usability
The external part of ASISU™ is designed to work together with manual perineal protection techniques used by midwives. The component adheres externally to the perineal area and is designed to help support the perineal tissue during crowning.
External part:
This finite element model illustrates the estimated stress distribution, measured in kPa, in the perineal structures and at the vaginal opening during the final stage of birth, crowning, with and without the device. The model applies a maximum load of 119.6 N, based on the conditions described by Cechova, Kalis, Havelkova et al. in the FINESSE study on pelvic floor stress during fetal head expulsion.Under the defined modelling assumptions and loading conditions, the simulation suggests a reduction in estimated perineal stress when the device is used. This computational modelling is intended to support biomechanical understanding only.Developed through biomechenical simulations, ASISU™ is designed to redistribute the stress on perineal tissue during birth.
Perineal tears occur when localized tissue stress exceeds the elasticity of the perineal tissue. During vaginal birth, the fetal head stretches the vaginal canal and perineum. This process creates high stress concentrations in specific areas of the perineum, which can lead to tissue rupture. This is the type of mechanical stress ASISU™ is designed to address. At oasicare we have developed groundbreaking biomechanical simulations of the vaginal and perineal area during childbirth. These simulations have guided the development together with clinical testing of the device from an engineering perspective to be able to to support distribution of forces across the perineal tissue.
We advance innovation in women’s health
You may have heard that research into women-specific conditions receives only a small share of overall funding — around 1%. For decades, women’s health has received less investment than other areas of medicine. Much of medical research has historically been based on male biology, leaving critical gaps in our understanding of women’s health — especially in pregnancy, birth and maternal care. For us at oasicare it is clear that childbirth deserve the same innovation hight as any other area of care. That is why oasicare was founded with the goal of supporting clinicians with better tools to improve women’s quality of care through evidence-based innovation. As a part of this mission, it is of highest importance to us at oasicare to contribute to strengthening the knowledge and evidence within maternal health and specifically perineal tears, partaking in improving that 1% number.
Join the C.A.R.E. network
“Clinical Advisory for Research & Evidence”
To stay connected with the clinical world and make sure that we base our decisions on clinical relevance, we have created our C.A.R.E network. A network of clinicians interested to stay up to date about ASISU™ and hear about advancements in the field, but also be our source for connection to the clinical world for innovation when we need it.
Discover our knowledge hub on tear research
We believe that perineal tears deserve more focus. We have created a hub with existing research on the topic for clinicians and health system professionals to dive deeper in the area and follow the latest developments.