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YY/T 0487-2010 PDF in English

YY/T 0487-2010 (YY/T0487-2010, YYT 0487-2010, YYT0487-2010)
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YY/T 0487-2010: PDF in English (YYT 0487-2010)

YY/T 0487-2010
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ICS 11.040.40
C 48
Pharmaceutical Industry Standard
of the People’s Republic of China
Replacing YY/T 0487-2004
Sterile, single-use hydrocephalus shunts and
(ISO 7197.2006 Neurosurgical implants - Sterile,
single-use hydrocephalus shunts and components, MOD)
Issued by. China Food and Drug Administration
                                      Page 2 of 14 
Table of Contents
Foreword ... 3 
Introduction ... 4 
1 Scope ... 6 
2 Normative references ... 6 
3 Terms and Definitions ... 7 
4 General requirements for shunts ... 8 
5 Specific requirements for components ... 10 
6 Marking and labelling of shunts... 11 
7 Packaging ... 11 
8 Information supplied by the manufacturer ... 11 
Appendix NA ... 13 
Bibliography ... 14 
                                      Page 3 of 14 
This Standard was drafted in accordance with rules given in GB/T 1.1-2009.
This Standard replaces YY 0487-2004 “Sterile, single-use hydrocephalus shunts and
Compared with YY 0487 2004, there are significant differences in terms of the technical
contents and editorial aspect.
This Standard modifies and adopts ISO 7197.2006 "Neurosurgical implants - Sterile,
single-use hydrocephalus shunts and components". The differences with the adopted
international standard are listed in Appendix NA.
This Standard shall be under the jurisdiction of Jinan Medical Device Quality
Supervision and Inspection Center of China Food and Drug Administration.
Drafting organization of this Standard. Shandong Medical Devices Product Quality
Inspection Center.
The main drafters of this Standard. Wu Ping, Wang Jinhong and Song Jinzi.
                                      Page 4 of 14 
A shunt is defined as an artificial connection of two compartments inside the body. For the
treatment of hydrocephalus, the ventriculo-atrial shunt has been introduced initially to
control the intraventricular pressure in the brain of the patients. Today ventriculo-peritoneal
shunts are preferably implanted. In special cases, a Jumbo-peritoneal shunt is implanted.
Normally a hydrocephalus shunt includes a valve which determines the resulting
intraventricular pressure in the brain of the patients and influences the flow rate through
the shunt.
The following types of valve are currently commercially available.
a) Conventional differential-pressure valves (DP-valves) are designed as ball-in-cone
valves, membrane valves or silicone slit valves.
They have one characteristic opening pressure. If the difference pressure between
inlet and outlet exceeds this opening pressure the device opens. After opening, the
different types of DP-valve show a wide range of different flow characteristics.
Differences due to a changed posture of the patient have no intended impact on the
function of the devices.
b) Adjustable DP-valves act like conventional DP-valves.
In contrast to non-adjustable devices they introduce the possibility of a non-invasive
readjustment of the opening characteristic after implantation. They do not take into
account changes due to a changed posture of the patient.
c) Gravitation valves or hydrostatic devices take into account the changed physics in
a shunt due to a changed posture of the patient.
These devices aim to avoid an unphysiological negative intraventricular pressure in
the upright position of the patient, which might be the consequence of the
hydrostatic pressure in shunts with adjustable or not adjustable DP-valves. There
are three different hydrostatic devices commercially available. flow-reducing
devices, valves with a so-called "anti-siphon-device" or "siphon-control-device" and
gravity-assisted devices.
d) Other adjustable valves, e.g..
- gravitation valves. adjustable hydrostatic devices present in addition to the
characteristics of hydrostatic devices (group 4) with the possibility of a non-
invasive readjustment of the opening performance of the device;
- adjustable anti-siphon-device valves;
- adjustable flow-reducing valves.
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Sterile, single-use hydrocephalus shunts and
1 Scope
This Standard specifies safety and performance requirements for sterile, single-use
non-active hydrocephalus shunts and components. This includes the components
used in shunts, like valves, tubes and reservoirs.
This Standard gives no recommendation concerning the superiority of a certain type
of valve.
For manufacturing, it defines the mechanical and technical requirements. This
Standard defines the technical information of the valve, to be given by the manufacturer.
In respect to the different principles of the valve types, specific characteristics are
defined for each group as declared by the manufacturer.
The benefit of this Standard for the surgeon and the patient is to understand the
information given by the manufacturer and to obtain standardized information about
the performance of a well working product with new design characteristics. The benefit
for the manufacturer is to define the important requirements for shunts as a basis for
investigations during development as well as for quality control during manufacture.
This Standard does not apply to active implants for the treatment of hydrocephalus.
2 Normative references
The following documents are essential to the application of this document. For the
dated documents, only the versions with the dates indicated are applicable to this
document; for the undated documents, only the latest version (including all the
amendments) are applicable to this Standard.
YY 0334 General specification for surgical implants made of silicone elastomer
YY/T 0640-2008 Non-active surgical implants-General requirements (ISO
14630.2005, IDT)
ASTM F 2503-05 Standard Practice for Marking Medical Devices and Other Items
for Safety in the Magnetic Resonance Environment
                                      Page 7 of 14 
3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.
accompanying documents
Document accompanying a medical device, or an accessory, and containing important
information for the user, operator, installer or assembler of the medical device,
particularly regarding safety supplied by the manufacturer.
NOTE. Adapted from ISO 14971.2000.
State of excessive accumulation of cerebro-spinal fluid CSF with the ventricular system
of the head due to a disturbance of secretion, flow or absorption.
hydrocephalus shunt
Single-use device(s) typically consisting of an inflow catheter, a pressure-controlling
device, and an outflow catheter intended to regulate the pressure of cerebro-spinal
fluid CSF.
instructions for use
Parts of accompanying documents provided by the manufacturer, giving the necessary
information for safe and proper use.
lumbo-peritoneal drainage
Drainage of cerebro-spinal fluid CSF from the lumbar sub-arachnoid spaces into the
patient identification card
Card identifying its holder and issuer, which carries data on the hydrocephalus shunt
                                      Page 9 of 14 
and the accompanying documents.
4.6 Pressure-flow characteristics of the valve, the components and the pre-
assembled shunt
The pressure-flow characteristics of the valve shall be tested and monitored in the
relevant flow range of (5 to 50) ml/h. A graph showing the pressure/flow characteristics
shall be included in the accompanying documents.
The manufacturer shall state if the complete system (catheter, reservoir and other
devices) causes fundamental changes in the pressure/flow characteristics. In this case,
graphs showing the pressure/flow characteristics of the complete shunt and the
components shall be included.
NOTE. Fundamental change would be additional resistance due to an inner diameter of the
catheter smaller than 1 mm (see 5.2).
If the device shows a posture-dependent function, the basic characteristic for the most
important positions should be shown (see 5.1.3).
If the characteristic of the device depends on the subcutaneous pressure, the effects
on the valve performance should be shown in the relevant ranges [see 8.2 g)].
4. 7 Identification of shunts in vivo
The type of the valve as well as the direction of flow shall be detectable non-invasively.
A method for the identification of the valve shall be given In the instructions for use and
In the patient identification card. For adjustable devices, an X-ray image related to the
basic understanding of the pressure settings shall be included in this information.
4.8 Ability to withstand ove...
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.