Biomedical Engineering – From Theory to Applications

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Biomedical Engineering – From Theory to Applications
Procedure: After sizing and marking of the circumcision line based on the circumcision style
desired (high/low), the Elastic Ring, loaded on to the Delivery Ring, is placed at “deployready”
position on the penis base (proximal). The foreskin tip is stretched open to allow
insertion of the Inner Ring, directly under the coronal sulcus. The Elastic Ring is then
deployed within the Inner Ring groove, initiating the ischaemic process and the Delivery
Ring is removed. The patient resumes his activities with only the Elastic Ring visible. After 7
days, the device is removed by flicking the Elastic Ring out of the groove and extracting the
inner ring with fingers or a standard medical spatula.
Regulatory issues (as declared by the manufacturer): "The device has a CE mark and is
manufactured using USP Class VI biocompatible elastomeric materials compliant to
ISO_13485 Medical Devices (Quality Management systems) and FDA, 21_CFR177.2600."
Declared contra-indication: The device is contraindicated for patients with phimosis if the
chosen procedure leaves the foreskin intact.
Once evidence of the style of circumcision achieved by this device is made public, this
latecomer to the design contest is expected to show significant advantages over its
competitors – especially if the claim of suitability for routine use without anaesthesia is
validated in more extensive trials.
10.5 Shang Ring
Inventor: Shang, J.
Primary patent: CN2003/000903
Patent priority date: 20 Oct 2003
Patient age range: Full-term neonate to adult
Website: http://www.snnda.com/enindex.asp
Category: Ischaemic necrosis device
Fig. 13. The Shang Ring device.
Procedure: The "Shenghuan Disposable Minimally Invasive Circumcision Anastomosis
Device", developed in China by Jianzhong Shang, involves minimal tissue manipulation and
is said to give a simpler, quicker and safer circumcision than conventional techniques
(Masson et al., 2010). It consists of two concentric plastic rings that sandwich the foreskin of
the penis, allowing circumcision without stitches or notable bleeding. As well as
substantially reduced operating times, MC using this device is associated with a low
complication rate, and the technique can easily be taught to both physicians and nonphysicians.
The Shang Ring is produced by Wuhu Snnda Medical Treatment Appliance
Technology Co. Ltd, Wuhu City, China.