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Clinical evidence

We offer a range of clinical Memokath studies, examples of which are listed below. Please contact us if you would like to access the full texts.


Pnn Medical acknowledge the importance of clinical evidence in today’s health care environment

Since their introduction to the market the Memokath™ stents have been  widely covered in the literature.

Pnn Medical collaborates with leading health care institutions all over the  world to provide clinical evidence to secure market entrance and for  reimbursement and marketing purposes.

Pnn Medical is constantly seeking to improve the body of evidence and  currently several clinical studies involving Memokath stents are ongoing in  US, UK, Germany, France, Japan and Denmark.

Ease of removal of thermo-expandable prostate stents

Neil J.  Barber,  Alison  J.  Roodhouse,  Per  Rathenborg,  Jørgen  Nordling and Brian W. Ellis. BJU International, Vol. 96, September 2005.

Objective: To report the ease of removal of the Memokath® 028 prostatic stent  (Engineers & Doctors A/S*, Denmark), an important attribute of the „ideal‟  prostatic stent.

Conclusions: These data show the ease of removal of the Memokath® 028  stent, reinforce its overall success in achieving the requirements of the ideal  intraprostatic stent, and further emphasize the advantages of this implant over  the epithelializing, permanent intraprostatic stent.

Thermo-expandable intraprostatic stents in blader outlet obstruction: An 8-year study

M.J.A. Perry, A.J. Roodhouse, A.B. Gidlow, T.G.  Spicer and B.W. Ellis. BJU International, Vol. 90,  May 2002.

Objective: To assess the use of a thermo-  expandable intraprostatic stent (Memokath®,  Engineers & Doctors A/S*, Denmark) for bladder  outlet obstruction in men unable to undergo  transurethral resection of the prostate (TURP),  assessing symptoms, complications and duration  of stent life.

Conclusion: The Memokath® intraprostatic stent is  a valuable addition to the armamentarium of the  urologist treating elderly or frail men with advanced  bladder outlet obstruction and complements  existing technologies.

Does the new spiral memokath® stent avoid repeated urethral strictures?

G. Riedasch, D. Motzkau, I. Drehmer, G. Staehler and K. Möhring. BJU International, Vol. 86, November 2000.

Objectives: The most troublesome longterm complications in using urethral stents are incrustation and growth of scarry tissue obstructing the lumen of the stent and urethra, respectively.

Conclusions: Contrary to “mesh stents”, the spiral Memokath® – stents seem to avoid transmural growth of the surrounding tissue. In fact, there is evidence, that by compressing the urethrotomised scar tissue a new, wide, totally epithelialised urethra is formed, thus avoiding secondary obstruction.

A novel long-term thermo expandable ureteric metal stent: Memokath™ 051 N. Buchholz et Al. British Journal of Urology. Int., 1-10. 2007

Objective: To examine the results of 42 cases  treated by the authors. Strictures were benign in 29  cases and malignant in 9 cases, and bilateral in 4  patients. The article also presents a cost-  comparison model between JJ and Memokath™  stent insertion.


Conclusions: The Memokath™ 051 stent seems  to be an attractive cost effective treatment option  both benign and malignant ureteric strictures. It has  the advantages of immediate decompression and  relief of obstructive uropathy symptoms while  bearing minimal risk for bladder irritation, reflux and  flank pain. There is no need for frequent stent  replacement. Interestingly, a 20% rate of  spontaneous stricture resolution could be related  with the insertion of the Memokath™ 051 stent.