Vacuum pumps and compressors for laboratory purposes …
Two study prostheses were worn by each participant: a novel, dynamic air exchange (DAE) prosthesis and a standard-of-care (Suction) prosthesis. Both were fit by a certified prosthetist. The DAE prosthesis () included a custom moisture-wicking textile sock with a proximal elastomeric airflow seal (); a modified-pin lock elastomeric liner (); and a total contact socket with a custom-designed, battery-operated negative gauge pressure-generating device and associated components attached to the socket exterior. The DAE system uses a small pump (CTS Series, Parker Hannifin; Hollis, New Hampshire) in fluid communication with occlusion-preventing liner ports (four proximal, one distal) to obtain a small proximal-to-distal pressure differential (~10 kPa) across the residual limb for secure adherence. A solenoid valve (High Density Interface solenoid valve, The Lee Company; Westbrook, Connecticut), which can be opened on demand by the user, allowed air flow through the sock weave from proximal to distal, ventilating the subject's skin. Depending on fit, the air flow may be up to 1.4 L/min. The pressure differential also enabled expulsion of perspiration accumulating at the distal end of the residual limb. The Suction prosthesis included an elastomeric liner, a total surface bearing suction socket with an expulsion valve, and an elastomeric sleeve. For both systems, a passive energy-storing prosthetic foot (LP Vari-Flex with EVO, össur; Foothill Ranch, California) with aluminum pylon was attached to the socket. When needed, an additional wool or synthetic sock was worn exterior to the liner to improve socket fit.
Penis Pump: Get the Facts on Vacuum Constriction Devices
An alternative approach is to expel perspiration from the prosthesis as it accumulates. This design transports perspiration by means of a miniature pump and solenoid airflow control system that can create a small pressure differential (vacuum or negative gauge pressure) between the proximal and distal regions of the donned prosthesis. This pressure differential, when carefully controlled, can be used to cause airflow (dynamic air exchange) between the prosthetic liner and the skin. This air flow can provide the means for expelling perspiration into an exterior reservoir and may also provide evaporative cooling of the residual limb.
The Triton Harmony combines the outstanding functionality of the 1C60 Triton carbon foot with the proven Harmony P3 technology. This results in a highly functional, compact foot system with integrated Harmony pump for the fabrication of a socket system with a greater vacuum, additional shock absorption and torsion capability.
The Harmony system improves adhesion between the residual limb and the prosthesis, resulting in enhanced proprioception and an additional plus in safety in any situation. Furthermore, the residual limb volume is stabilized and circulation is promoted.
Compared to the use of separate components, the 1c62 Triton Harmony offers a weight advantage and reduced structural height. This means patients with a longer transtibial residual limb can also benefit from the combination of Triton features with Harmony vacuum technology.
The scope of delivery for the Triton Harmony includes a Spectra-Sock, the footshell including connection cap, a transparent (soft) and anthracite (firm) heel wedge, a pump with pre-assembled functional ring, socket connector and sound absorber.