Otto Bock Harmony P3 4R147, Instructions For Use Manual

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Ottobock | 17 ­armonyy3 44147
4.5 Selecting and adjusting the functional ring
NOTICE
Function loss as a result of improper use.
The Functional Ring may only be selected/adjusted
by prosthetists that have been authorized by Ottobock.
4.5.1 Selecting the right functional ring
Use the following selection table to select the right Functional Ring. The Functional Ring version
is marked on the intake valve receiver (Fig. 8).
Body Weight
Recommended
Functional Ring
kg lbs
40 – 47 88 – 103
0
48 – 55 104 – 121
1
56 – 65 122 – 143
2
66 – 75 144 – 165
3
76 – 87 166 – 192
4
88 – 100 193 – 220
5
101 – 112 221 – 247
6
113 – 125 248 – 276
7
Please note that the recommendations do not necessarily represent the optimal selection for the pa-
tient. When deviating from the selection data, the Functional Ring with the highest possible stiffness
should be selected that nevertheless still creates a sufficient vacuum. Ottobock recommends that a
vacuum of approx. 500 mbar (15 inHg) or more should be reached within 50 steps with the prosthesis.
If the patient feels like they are “bottoming out”, a stiffer Functional Ring should be used. If the
pump does not reach a sufficient vacuum level, a softer Functional Ring should be used.
4.5.2 Changing the functional ring
1. Loosen the retaining screw on the distal end of the Base (Fig. 5, item 10) and remove it (Fig. 7,
Step 1). If the pump is mounted completely, remove the tube adapter with foot beforehand.
2. Pull the Base away from the Shaft (Fig. 7, Step 2).
3. Pull off the installed Functional Ring (Fig. 7, Step 3).
4. Select the desired Functional Ring (Section 4.5.1)
5. Preparing the Functional Ring for initial use
Prior to its first use, Ottobock recommends that separately ordered Functional Rings should be
pre-compressed with the separately available Pre-compression Tool 4X247 to ensure proper
function. Without pre-compression, new Functional Rings can be overly stiff. If using the pre-
installed Functional Ring or an already pre-compressed unit please continue with step 6.
a. Open the Pre-compression Tool
b. Place the Functional Ring in the Pre-compression Tool (Fig. 9)
c. Completely compress the Functional Ring by tightening the screw completely (Fig. 10)
d. Compression time: Minimum 3 minutes to a maximum of 15 minutes
e. Open the Pre-compression Tool remove the Functional Ring and install it in the pump