Why would you consider a ConvaTec convex solution?

  • You experience leakage
  • Your stoma is flush or retracted
  • Your abdomen tone has changed

What is Convexity?

  • Convexity is the outward curving of the baseplate or skin barrier.2, 3
  • Convexity applies a uniform pressure to the immediate peristomal skin, improving the projection of the stoma for drainage.4
  • Convexity helps maintain a secure seal between the pouch and the skin.5

When to Use Convexity

Flush Stomas

Located at the same level as the abdomen skin surface, and does not protrude 6

Retracted Stomas

Stoma pulled into the abdomen below skin level or having little or no spout 7

Skin Folds

A stoma which is deep in a skin fold/crease 5

Soft or Flaccid Abdomens

An abdomen requiring firm level of support to stabilize the pouching system 6

Characteristics of Convexity


Firm/Rigid Convexity

Typically used on soft or flaccid abdomens.

Soft Convexity

Typically used on firm or toned abdomens.


Height of the convex plateau.

Deep or Shallow

Plateau Width

Distance across the raised flat surface from edge-to-edge.

Find Your
Perfect Fit

Choosing the right convexity solution for different body profiles can be challenging.
User our Convexity Product Selector Tool to answer 3 simple questions to learn more about convex products that may work for your stoma.
Get started now

Need More Help?

Please feel free to consult with one of our me+™ Specialists
or WOC Nurses for further guidance.
Call 1-800-422-8811, visit mepluscare.com
or email cic@convatec.com

Are you a Healthcare Professional?

Our me+™ Concierge team can assist you with:

  • Personalized support
  • Enrolling your patients into the me+™ program
  • Providing a me+ starter kit and free product samples for your patients
Contact your me+ Concierge specialist at 1-877-585-0470
or email concierge@convatec.com

View the Convexity Solutions Detail Aid to learn more about our convex products.

Read now


  1. DRG data 2015, in T5 markets: Japan, UK, USA, Germany, China.
  2. Rolstad, BS. Principles and techniques in the the use of convexity. Ostomy Wound Manage. 1996. 42(1); 24-32.
  3. Pontieri, Lewis V. Basics of ostomy care. Medsurg Nurs. 2006; 15(4): 199-202.
  4. Hanley, J. Convex stoma appliances: are we getting it right? British Journal of Nursing (Stoma Supplement). 2013; 22(16).
  5. Turnbull, GB. The convexity controversy. Ostomy Wound Manage. 2003; 49(1): 16-www.o-wm.com/article/1203. Accessed 29 Feb, 2016.
  6. Boyd, K. Clinical Protocols for Stoma Care – Use of convex appliances. Nursing Standard. 2004; 18(20): 37-38.
  7. Burch, 2011: Management of Stoma Complications. NursingTimes.net. 10 Nov 2011.