Ability dynamics RUSH FOOT EVAQ8 series Instructions For Use Download Page 1

INSTRUCTIONS FOR USE

SAFETY

   This product is only to be used in lower limb prosthetic devices. 

   This system is intended to produce elevated vacuum 

suspension for lower limb amputees already fit with an 
appropriate vacuum suspension socket. The socket should 
have a good fit with no voids. This is to help prevent 
blisters and to prevent tissue from being drawn into the 
voids or poor fit areas.

   This product should only be fit by trained prosthetic 

professionals. 

   The vacuum pump heel, socket valve, and associated 

barbs & tubing should be inspected often for signs 
of damage or excessive wear.

   Ensure that the tubing is properly secured at all times.

CONTENTS AT ARRIVAL

1. Vacuum pump heel
2. Straight barb
3. Exhaust filter
4. Tubing
 

5. Inline filter
6.  Socket right angle barb 

and housing

7.  Tube securing hook 

and loop tape

FUNCTION

The 

RUSH FOOT EVAQ8 is a product designed to provide 

the user with an elevated vacuum suspension for a lower 
limb prosthesis. The vacuum pump compresses and expands 
throughout the gait cycle. The cycling of the vacuum pump 
pulls air from the socket, and after multiple steps, the system 
can achieve vacuum levels of 

18 to 22 inHg. The number of 

steps needed to achieve maximum vacuum levels depends on 
the free air in the system. This is determined by the fit of the 
socket, number of socks used, and length of tubing required.

ASSEMBLY AND INSTALLATION

The 

RUSH FOOT EVAQ8 system comes preassembled 

inside the heel of the 

RUSH Foot

®

. To connect the vacuum 

system to the socket:
1.  Connect a short piece of the tubing (4) to the socket 

right angle barb (6).

2.  Install the inline filter (5) into the distal end of the tubing 

(the inline filter may be placed anywhere in the tubing 
run between the socket and vacuum pump heel).

3.  Connect a second piece of tubing (4) to the distal end 

of the inline filter (5) and route the tube to the medial 
side of the pylon or wrap the tubing around the pylon 
(to prevent damage to the tube or snagging while walking).

4.  Cut the tubing (4) to desired length and connect to the 

straight barb (2) located in the recessed area of the vacuum 
pump heel (1).

5.  Secure the tubing to the pylon using the included hook 

and loop tape (7) or other appropriate tape.

TROUBLESHOOTING

If vacuum cannot be generated or maintained by the system, 
complete the following troubleshooting guide:

   Inspect tubing (4) for cracks, holes or other potential leaks.

   Reseat tubing at each connection point to ensure good seal.

   Inspect inline filter. Remove the inline filter (5) from the tubing 

and hold up to a light to look through it. If light can be seen 
through it, the filter is clean. If the light is blocked, blast 
air from a syringe through the inline filter (5) from distal to 
proximal end (reverse of normal flow) to attempt to clear the 
blockage. If blockage persists, the filter needs to be replaced.

   Inspect socket right angle valve (6) and installation area for leaks. 

   Inspect socket expulsion valve (if used) and installation area 

for leaks.

   Inspect socket and suspension sleeve for potential leaks.

V1EVAQ8Dec17

Weight Line

Adjustment Wedges (ONLY on bottom)

1/8"

3/8"

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