Upper Prosthetics (Harnessing)

Single control cables (Bowden cable) attaches distally to _____________ of hook terminal device via _______________, attaches _________________ to control attachment strap of harness via ___________, glenohumeral flexion and bi-scapular abduction used to apply tension on the __________________ and open or close the terminal device.

"thumb" proximally triple-swivel hanger control cable

with a fig-9 harnesses, anterior support straps, triceps pad, and any type of hinge are _______________, left with only the ______________ and ____________________, the cross-bar assembly is moved to ________________________ aspect of socket, and uses the same body movements for terminal device operation

eliminated axilla loop control attachment strap posterior/proximal

_______________ any movement from one point to another, usually with the implied idea of returning again to the original position. A range of movement regularly repeated in performance of a function.

excursion

_______________________ force used to operate the components of the prosthesis comes from a source outside the body (ex: battery powered electronic devices)

external power

______________________ is used with amputations through the distal 1/3 of the forearm or with amputation levels that retain ______________________, commonly made of ___________ webbing, proximal end of hinge attaches to the distal end of the ______________, distal end of hinge attaches to the ______________ of the prosthesis, flexible hinge should allow for at least ________ of normal pronation and supination

flexible hinge pronation/supination dacron triceps pad forearm 50%

_____________ is a push or a pull upon an object

force

Glenohumeral flexion is a good ___________________ and provides sufficient _______________ for full opening of the terminal device

force generator cable travel

Distal end of cable housing is anchored to the ____________ via a _____________ and ____________ (lateral aspect mid-forearm of px)

forearm base plate retainer

Primary body motion used to control the single cable trans-radial system is _________________

glenohumeral flexion

Disadvantages of body powered systems include requires ____________ to capture ____________, harness can be restrictive and uncomfortable. May be impossible for _____________________ amputations and those with limited ______________ or force ability

harness excursion higher level excursion

For ____________________ the standard fig-8 harness may be a disadvantage when carrying heavy loads with px. _________________ is pulled vertically into the sound side axilla causing excessive pressure (________________) and skin irritation

heavy duty users Axilla loop brachial plexus

Purpose of the cable housing is to maintain a constant ____________ of the control cable regardless of ____________ position. The amount of __________ needed to operate the terminal device is the same whether the elbow is completely __________ or fully _________

length elbow excursion extended flexed

Advantages of external body powered systems include improved __________, more intuitive ___________ scheme (for trans-radial), improved ___________

mobility control cosmetics

____________________(inverted "y") originates at the axilla loop/cross point, passes over the shoulder on the _______________ side, attaches to the anterior/proximal portion of the ______________

Anterior support strap amputated triceps pad

The six components of a Fig-8 harness are (hint: AACCTH)

Axilla loop Anterior support strap Control attachment strap Crosspoint Triceps pad Hinges (rigid or flexible)

__________________ is the primary anchor from which the other 2 straps originate, in-circles the ______________ of the ______________ arm, should always be worn with an _________________ underneath and be padded to protect skin

Axilla loop sound side undergarment

____________________ is used for excursion when terminal device is in fixed position or performing activities close to the midline (ex:buttoning a shirt)

Bi-scapular abduction

A ______________ Harness works with a single control cable system is also called a _______________________

Fig-8 Bowden cable

___________________________ is used with unilateral trans-radial amputation that can be fit with self-suspending style socket (Muenster, Northwestern)

Fig-9 harness

____________________ is located on the posterior aspect of the humerus approximately half way down the humeral segment, provides attachment of the harness to the __________ via the _____________ proximally and the rigid or ________________ distally, and provides a platform or anchor for the __________________

Triceps pad socket inverted "y" flexible hinge cross-bar assembly

Control attachment strap originates at the _____________________, terminates/attaches to proximal end of ___________________, acts as an ____________ of the control cable, should pass over the _____________ of the scapula between the spine and the inferior angle of the scapula, captures _________________ and _______________________ for operation of the terminal device

axilla loop/cross point control cable extension distal 1/3 glenohumeral flexion scapular abduction

_________________ is force used to operate the components of the prosthesis comes from a ______________ transmission of muscular effort generated from the _______________ (remote from the amputation site)

body powered mechanical individual

Voluntary opening hooks remains _____________ when control cable is relaxed, relies on __________________ to close hook, and number of rubber bands determines ______________ (1 band = ______ grip force)

closed rubber bands grip force 1 lb

Disadvantages of external body powered systems include high ________, increased __________, reduced ________________ due to high sensitivity and mechanical complexity

cost weight dependability

Advantages of body powered systems include low _________, light ___________, high ___________ due to mechanical _______________

cost weight reliability simplicity

___________________ is the point where the axilla loop, anterior support strap, and control attachment strap meet. It may be sewn or held together with a ________________ ring. Ring is less ______________, allows straps to shift and provide maximal _____________, located below the spinous process of _______ and slightly toward the ___________________ side

cross point Northwestern restrictive mobility C7 non-amputated

Figure of 8 harness is made from ___________________ (usually ____________) arranged to form a horizontal figure of 8

non-elastic webbing dacron

Voluntary closing hooks remains _________ when control cable is relaxed, relies on _________ applied through the control cable to ________ hook, grip force dependent on ____________________

open force close force applied

Single control cable (Bowden cable) provides _____________________ to terminal device, transmits ______________________ from harness for operation of terminal device

physical connection tensional forces

Advantages of the fig-9 harness include being less ____________ and a more __________ design for donning etc.

restrictive simple

With a shoulder saddle harness, loading is distributed over the ___________ on the _____________________ instead of being transmitted to the sound side axilla, and a _____________________ must be added to provide anchor to create tension on control cable

shoulder amputated side chest strap

Control cable is encased by ___________________ housing (must use ____________ lining if using spectralon)

stainless steel Teflon

Single control cables (Bowden cable) are made with ______________________ and ___________________

stainless steel spectralon cable

Anterior support strap (inverted "y") functions to ___________ the socket, resists _______________________ of socket on the RL when lifting heavy loads

suspend vertical displacement

Fig-9 harness does not provide ________________

suspension

Fig 8 Harness provides ______________ on RL, captures excursion created by ____________________ and ____________________, transmits ___________ to cable for operation of the terminal device

suspension glenohumeral flexion biscapular abduction forces

Disadvantages of the fig-9 harness include no auxiliary ____________, difficult to wear ____________________ (cable webs across the axilla area)

suspension underneath clothing

__________________ transmitted through a string, rope, cable or wire when it is pulled tight by forces acting from opposite ends. The tension force is directed along the ____________ of the wire and pulls __________ on the objects on the opposite ends of the wire

tensional force length equally

The proximal end of cable housing is attached to the ______________ via the _____________ assembly

triceps pad cross-bar

The two types of terminal hook devices include __________________ and _______________

voluntary opening voluntary closing