Convexity Solutions

All bodies are different

Convex wafers are designed to help reduce leakage and simplify stoma management.

Why would you consider a ConvaTec convex solution?

  • You experience leakage
  • Your stoma is flush or retracted
  • Your abdomen tone or lifestyle 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 protrude6

Retracted Stomas

Stoma pulled into the abdomen below skin level or having little or no spout7

Skin Folds

A stoma which is deep in a skin fold/crease5

Soft or Flaccid Abdomens

An abdomen requiring firm level of support to stabilize the pouching system6

Characteristics of convexity

Rigidity

Firm/Rigid Convexity
Typically used on soft or flaccid abdomens.

Soft Convexity

Typically used on firm or toned abdomens.

Depth

Height of the convex plateau.
Deep or Shallow

Plateau Width

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

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.

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