Nabtesco NK-6 Symphony Manual
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Nabtesco NK-6 Symphony Manual

6-bar hydraulic knee joint
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For Users
6-Bar Hydraulic Knee Joint
NK-6 Symphony
User's Guide
6
NK-6
-Bar Hydraulic Knee
Introduction
Thank you for using the NK-6 Symphony.
This product is a prosthetic knee joint
which ensures high stability of stance
and excellent ability to respond to the
walking speed through unique 6-bar
linkage system and hydraulic cylinder.
Before using the product, read
this
User's Guide, and understand the correct
procedures for using. Keep it handy for
future reference.

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Summary of Contents for Nabtesco NK-6 Symphony

  • Page 1 NK-6 Symphony User’s Guide NK-6 -Bar Hydraulic Knee Introduction Thank you for using the NK-6 Symphony. This product is a prosthetic knee joint which ensures high stability of stance and excellent ability to respond to the walking speed through unique 6-bar linkage system and hydraulic cylinder.
  • Page 3 NK-6 Symphony. This device is intended for single patient multiple use. For the specifications for NK-6 Symphony, see 4. Outline of the Product. Do not use NK-6 Symphony outside of the specification range. Do not modify the main body or parts.
  • Page 4 About This Document ■ Target of this document This document is intended for the prosthetic user of NK-6 Symphony. It covers the following references: NK-6, NK- 6SH, NK-6+L and KN-6SH+L. ■ Copy right Nabtesco owns copyright this document. It is not permitted to duplicate any...

  • Page 5: Table Of Contents

    NK-6 Bar Hydraulic Knee Contents 1. Safety Precautions ..........P.4 1-1 Definition of Symbols ........P.4 1-2 Mandatory Precautions ......... P.5 2. Basic Construction and Operational Principle..P.9 2-1 Basic Construction ........P.9 2-2 Operational Principle ........P.9 3. Before Use ............P.10 3-1 How to Activate the “Stance-Flexion”...

  • Page 6: Safety Precautions

    1. Safety Precautions 1-1 Contraindications Person who cannot understand how to use the knee and caution for use Person who has problem and pain on the residual limb Person who weighs over 125kg (if high-active user: over 100kg) Use for any sports which give high impact on the knee 1-2 Definition of Symbols Indicates a potentially...

  • Page 7: Mandatory Precautions

    1-3 Mandatory Precautions WARNING Hand the separate User’s Guide to the MANDATORY user and explain the ACTION instructions for use. Improper use can cause a fall or injury. Upon detecting any abnormal noise, play, or drop in hydraulic resistance, discontinue MANDATORY ACTION use and contact your...
  • Page 8 DO NOT use for a person who weighs over 125 kg. PROHIBITION NK-6 Symphony was tested for 3 million walking cycles with load of 125kg which corresponds to the average working distance within about 3 years. We will not assume liability for ageing or damage of the product.
  • Page 9 CAUTION Instructions for storage DO NOT put the product in a high place. DO NOT place it against something PROHIBITION in an unstable state. The product may drop or fall down, thereby causing damage to parts. DO NOT put anything on the product.
  • Page 10 Instructions for use Do not use the product where the outdoor temperature is lower than PROHIBITION –20°C. The lubricant and rubber parts may harden, thereby causing failure. Do not use the product near open flame or where the temperature exceeds PROHIBITION 50°C.

  • Page 11: Basic Construction And Operational Principle

    Basic Construction and Operational Principle 2-1 Basic Construction The NK-6 Symphony consists of a 6-bar linkage which controls the stance phase and a hydraulic cylinder which controls the swing phase. The selective lock with which the user can lock the knee by himself/herself can be chosen at the user’s option.

  • Page 12: Before Use

    3. Before Use 3-1 How to Activate the “Stance-Flexion” Function Fig. 3 shows how to load the prosthesis equipped with this knee joint. When the weight is placed on the heel as shown in the left figure while the knee is completely extended, the knee is automatically locked (self-locked) and slightly flexed (stance- flexion).

  • Page 13: Procedures For Operating The Selective

    (NK-6+L, NK-6SH+L) 3-2 Procedures for Operating the Selective Lock (Optional Function) The selective lock is to be operated by the user. The user shall thoroughly understand the operating procedures. The selective lock mechanism has a switch above the knee joint to switch the lock mode on or off.

  • Page 14: Precautions For Operating The Selective

    (NK-6+L, NK-6SH+L) 3-3 Precautions for Operating the Selective Lock [Precautions for locking operation] Before starting to walk, make sure that the selective lock is securely activated. CAUTION To operate the selective lock, slide the switch surely to the position shown in Fig.

  • Page 15: Precautions When Sitting In And

    3-4 Precautions When Sitting in and Standing up from a Chair When sitting in a chair, never place the ▪ hand behind the knee. The hand can be caught in the swaying part of the hydraulic cylinder, causing serious injury. When standing up from a chair, never ▪...

  • Page 16: Troubleshooting

    4. Troubleshooting Items to be Status Countermeasures checked The self-lock Check if body Practice how to fully cannot be weight is apply body weight to activated. applied properly. the heel. Check for Adjust the alignment proper so that body weight alignment.

  • Page 17: Outline Of The Product

    5. Outline of the Product ● Specifications Model No. NK-6 NK-6+L NK-6SH NK-6SH+L Proximal Male Pyramid Adapter Screw Head Connection Selective Lock – – Total Length 197mm 191mm A ref. 14mm 14.5mm measurement B ref. 156mm 156mm measurement Weight 920 g 970 g 960 g 1010 g...

  • Page 18: Disposal

    6. Disposal The table below shows the materials of the NK-6 Symphony knee unit in each component. When disposing of the knee joint, comply with the rules stipulated in the local community. If you return it to Nabtesco after giving such a notification, we will dispose of it for you.

  • Page 19: Symbols Used

    K4 Level (MOB4): User has physical abilities higher than basic walking; children, athletes, etc. 7-3 Product Type Label (Knee Joint Body) A Product type B Serial number Nabtesco MADE IN JAPAN Declaration of conformity according to the European Regulation 2017/745 P.17...
  • Page 20 Document Number: 81-SS00085E (ver.2) Data of issue: July 1, 2021 Nabtesco Corporation Manufacturer Nabtesco Corporation Accessibility Innovations Company Assistive Products Department 35, Uozakihama-machi Higashinada-ku Kobe, Japan 658-0024 TEL: +81-78-413-2724 FAX: +81-78-413-2725 https://welfare.nabtesco.com Authorized representative for EU countries PROTEOR SAS 6 rue de la Redoute...

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