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What does SACH stand for?

SACH stands for solid-ankle cushion heel

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However, the lack of motion in a solid ankle design necessitated a new approach to shock absorption during loading response. The cushion heel of the SACH design and several subsequent ESAR designs provides shock absorption through material compression. The magnitude of simulated ankle plantarflexion for the solid ankle cushioned heel.
The non-dynamic response foot known as the solid ankle cushion heel (SACH) was introduced in the 1950’s and consists of a non-articulating wood keel surrounded by soft foam molded in the shape of a foot. The keel is entirely rigid and is unable to dorsiflex at late mid-stance resulting in an excessive rise in the center of mass as the patient progresses through stance on the prosthetic side.
The vertical reference line is the centre line of the shank pylon tube and the medial side of the prosthesis is much more convenient for viewing an extension of the shank tube centre line from above or checking the alignment by use of a plumb bob in a vertical fabrication jig. The vertical reference line, in both posterior and medial views of the prosthesis, becomes the reference for offsets or angles for alignment of foot, knee, and socket during bench alignment. At Berkeley the use of endo-skeletal systems with aluminium tubing as the shank structure and the SACH (Solid Ankle Cushion Heel.
Heel cushion (e. g. , the solid ankle cushion (SACH) heel.
pneumatic, gel), prefabricated,of-the-shelf">L4350 - Ankle control orthosis, stirrup style, rigid, includes any type of interface (E. G. , pneumatic, gel), prefabricated,of-the-shelf L4360 - Walking boot, pneumatic and/or vacuum, with or without joints, with or without interface material, prefabricated item that has been trimmed, bent, molded, assembled, or otherwise customized to fit a specific patient by an individual with expertise L4361 - Walking boot, pneumatic and/or vacuum, with or without joints, with or without interface material, prefabricated, off-the-shelf L4370 - Pneumatic full leg splint, prefabricated, off-the-shelf L4386 - Walking boot, non-pneumatic, with or without joints, with or without interface material, prefabricated item that has been trimmed, bent, molded, assembled, or otherwise customized to fit a specific patient by an individual with expertise L4387 - Walking boot, non-pneumatic, with or without joints, with or without interface material, prefabricated, off-the-shelf L4392 - Replacement, soft interface material, static AFO L4394 - Replace soft interface material, foot drop splint L4396 - Static or dynamic ankle foot orthosis, including soft interface material, adjustable for fit, for positioning, may be used for minimal ambulation, prefabricated item that has been trimmed, bent, molded, assembled, or otherwise customized to fit a specific patient by an individual with expertise L4397 - Static or dynamic ankle foot orthosis, including soft interface material, adjustable for fit, for positioning, may be used for minimal ambulation, prefabricated, off-the-shelf L4398 - Foot drop splint, recumbent positioning device, prefabricated, off-the-shelf L4631 - AFO, walking boot type, varus/valgus correction, rockerbottom. anterior tibial shell, soft interface, custom arch support, plastic or other material, includes straps and closures, custom fabricated L5000 - Partial foot, shoe insert with longitudinal arch, toe filler L5010 - Partial foot, molded socket, ankle height, with toe filler L5020 - Partial foot, molded socket, tibial tubercle height, with toe filler L5050 - Ankle, Symes, molded socket, SACH foot L5060 - Ankle, Symes, metal frame, molded leather socket, articulated ankle/foot L5100 - Below knee, molded socket, shin, SACH foot L5105 - Below knee, plastic socket, joints and thigh lacer, SACH foot L5150 - Knee disarticulation (or through knee), molded socket, external knee joints, shin, SACH foot L5160 - Knee disarticulation (or through knee), molded socket, bent knee configuration, external knee joints, shin, SACH foot L5200 - Above knee, molded socket, single axis constant friction knee, shin, SACH foot L5210 - Above knee, short prosthesis, no knee joint (“stubbies”), with foot blocks, no ankle joints, each L5220 - Above knee, short prosthesis, no knee joint (“stubbies”), with articulated ankle/foot, dynamically aligned, each L5230 - Above knee, for proximal femoral focal deficiency, constant friction knee, shin, SACH foot L5250 - Hip disarticulation, Canadian type; molded socket, hip joint, single axis constant friction knee, shin, SACH foot L5270 - Hip disarticulation, tilt table type; molded socket, locking hip joint, single axis constant friction knee, shin, SACH foot L5280 - Hemipelvectomy, Canadian type; molded socket, hip joint, single axis constant friction knee, shin, SACH foot L5301 - Below knee, molded socket, shin, SACH foot, endoskeletal system L5312 - Knee disarticulation (or through knee), molded socket, single axis knee, pylon, SACH foot, endoskeletal system L5321 - Above knee, molded socket, open end, SACH foot, endoskeletal system, single axis knee L5331 - Hip disarticulation, Canadian type, molded socket, endoskeletal system, hip joint, single axis knee, SACH foot L5341 - Hemipelvectomy, Canadian type, molded socket, endoskeletal system, hip joint, single axis knee, SACH foot L5400 - Immediate post surgical or early fitting, application of initial rigid dressing, including fitting, alignment, suspension, and one cast change, below knee L5410 - Immediate post surgical or early fitting, application of initial rigid dressing, including fitting, alignment and suspension, below knee, each additional cast change and realignment L5420 - Immediate post surgical or early fitting, application of initial rigid dressing, including fitting, alignment and suspension and one cast change “AK” or knee disarticulation L5430 - Immediate post surgical or early fitting, application of initial rigid dressing, including fitting, alignment and suspension, “AK” or knee disarticulation, each additional cast change and realignment L5450 - Immediate post surgical or early fitting, application of non-weight bearing rigid dressing, below knee L5460 - Immediate post surgical or early fitting, application of non-weight bearing rigid dressing, above knee L5500 - Initial, below knee “PTB” type socket, non-alignable system, pylon, no cover, SACH foot, plaster socket, direct formed L5505 - Initial, above knee-knee disarticulation, Ischial level socket, non-alignable system, pylon, no cover, SACH foot, plaster socket, direct formed L5510 - Preparatory, below knee “PTB” type socket, non-alignable system, pylon, no cover, SACH foot, plaster socket, molded to model L5520 - Preparatory, below knee “PTB” type socket, non-alignable system, pylon, no cover, SACH foot, thermoplastic or equal, direct formed L5530 - Preparatory, below knee “PTB” type socket, non-alignable system, pylon, no cover, SACH foot, thermoplastic or equal, molded to model L5535 - Preparatory, below knee “PTB” type socket, non-alignable system, no cover, SACH foot, prefabricated, adjustable open end socket L5540 - Preparatory, below knee “PTB” type socket, non-alignable system, pylon, no cover, SACH foot, laminated socket, molded to model L5560 - Preparatory, above knee-knee disarticulation, Ischial level socket, non-alignable system, pylon, no cover, SACH foot, plaster socket, molded to model L5570 - Preparatory, above knee-knee disarticulation, Ischial level socket, non-alignable system, pylon, no cover, SACH foot, thermoplastic or equal, direct formed L5580 - Preparatory, above knee-knee disarticulation, Ischial level socket, non-alignable system, pylon, no cover, SACH foot, thermoplastic or equal, molded to model L5585 - Preparatory, above knee-knee disarticulation, Ischial level socket, non-alignable system, pylon, no cover, SACH foot, prefabricated adjustable open end socket L5590 - Preparatory, above knee-knee disarticulation, Ischial level socket, non-alignable system, pylon, no cover, SACH foot, laminated socket, molded to model L5595 - Preparatory, hip disarticulation-hemipelvectomy, pylon, no cover, SACH foot, thermoplastic or equal, molded to patient model L5600 - Preparatory, hip disarticulation-hemipelvectomy, pylon, no cover, SACH foot, laminated socket, molded to patient model L5610 - Addition to lower extremity, endoskeletal system, above knee, hydracadance system L5611 - Addition to lower extremity, endoskeletal system, above knee-knee disarticulation, 4 bar linkage, with friction swing phase control L5613 - Addition to lower extremity, endoskeletal system, above knee-knee disarticulation, 4 bar linkage, with hydraulic swing phase control L5614 - Addition to lower extremity, exoskeletal system, above knee-knee disarticulation, 4 bar linkage, with pneumatic swing phase control L5616 - Addition to lower extremity, endoskeletal system, above knee, universal multiplex system, friction swing phase control L5617 - Addition to lower extremity, quick change self-aligning unit, above or below knee, each L5618 - Addition to lower extremity, test socket, Symes L5620 - Addition to lower extremity, test socket, below knee L5622 - Addition to lower extremity, test socket, knee disarticulation L5624 - Addition to lower extremity, test socket, above knee L5626 - Addition to lower extremity, test socket, hip disarticulation L5628 - Addition to lower extremity, test socket, hemipelvectomy L5629 - Addition to lower extremity, below knee, acrylic socket L5630 - Addition to lower extremity, Symes type, expandable wall socket L5631 - Addition to lower extremity, above knee or knee disarticulation, acrylic socket L5632 - Addition to lower extremity, Symes type, “PTB” brim design socket L5634 - Addition to lower extremity, Symes type, posterior opening (Canadian) socket L5636 - Addition to lower extremity, Symes type, medial opening socket L5637 - Addition to lower extremity, below knee, total contact L5638 - Addition to lower extremity, below knee, leather socket L5639 - Addition to lower extremity, below knee, wood socket L5640 - Addition to lower extremity, knee disarticulation, leather socket L5642 - Addition to lower extremity, above knee, leather socket L5643 - Addition to lower extremity, hip disarticulation, flexible inner socket, external frame L5644 - Addition to lower extremity, above knee, wood socket L5645 - Addition to lower extremity, below knee, flexible inner socket, external frame L5646 - Addition to lower extremity, below knee, air, fluid, gel or equal, cushion socket L5647 - Addition to lower extremity, below knee, suction socket L5648 - Addition to lower extremity, above knee, air, fluid, gel or equal, cushion socket L5649 - Addition to lower extremity, ischial containment/narrow M-L socket L5650 - Addition to lower extremity, total contact, above knee or knee disarticulation socket L5651 - Addition to lower extremity, above knee, flexible inner socket, external frame L5652 - Addition to lower extremity, suction suspension, above knee or knee disarticulation socket L5653 - Addition to lower extremity, knee disarticulation, expandable wall socket L5654 - Addition to lower extremity, socket insert, Symes (Kemblo, Pelite, Aliplast, Plastazote or equal) L5655 - Addition to lower extremity, socket insert, below knee (Kemblo, Pelite, Aliplast, Plastazote or equal) L5656 - Addition to lower extremity, socket insert, knee disarticulation (Kemblo, Pelite, Aliplast, Plastazote or equal) L5658 - Addition to lower extremity, socket insert, above knee (Kemblo, Pelite, Aliplast, Plastazote or equal) L5661 - Addition to lower extremity, socket insert, multidurometer, Symes L5665 - Addition to lower extremity, socket insert, multidurometer, below knee L5666 - Addition to lower extremity, below knee, cuff suspension L5668 - Addition to lower extremity, below knee, molded distal cushion L5670 - Addition to lower extremity, below knee, molded supracondylar suspension (“PTS” or similar) L5671 - Addition to lower extremity, below knee/above knee suspension locking mechanism (shuttle, lanyard or equal), excludes socket insert L5672 - Addition to lower extremity, below knee, removable medial brim suspension L5673 - Addition to lower extremity, below knee/above knee, custom fabricated from existing mold or prefabricated, socket insert, silicone gel, elastomeric or equal, for use with locking mechanism L5676 - Addition to lower extremity, below knee, knee joints, single axis, pair L5677 - Addition to lower extremity, below knee, knee joints, polycentric, pair L5678 - Addition to lower extremity, below knee, joint covers, pair L5679 - Addition to lower extremity, below knee/above knee, custom fabricated from existing mold or prefabricated, socket insert, silicone gel, elastomeric or equal, not for use with locking mechanism L5680 - Addition to lower extremity, below knee, thigh lacer, nonmolded L5681 - Addition to lower extremity, below knee/above knee, custom fabricated socket insert for congenital or atypical traumatic amputee, silicone gel, elastomeric or equal, for use with or without locking mechanism, initial only (for other than initial, use code L5673 or L5679) L5682 - Addition to lower extremity, below knee, thigh lacer, gluteal/ischial, molded L5683 - Addition to lower extremity, below knee/above knee, custom fabricated socket insert for other than congenital or atypical traumatic amputee, silicone gel, elastomeric or equal, for use with or without locking mechanism, initial only (for other than initial, use code L5673 or L5679) L5684 - Addition to lower extremity, below knee, fork strap L5685 - Addition to lower extremity prosthesis, below knee, suspension/sealing sleeve, with or without valve, any material, each L5686 - Addition to lower extremity, below knee, back check (extension control) L5688 - Addition to lower extremity, below knee, waist belt, webbing L5690 - Addition to lower extremity, below knee, waist belt, padded and lined L5692 - Addition to lower extremity, above knee, pelvic control belt, light L5694 - Addition to lower extremity, above knee, pelvic control belt, padded and lined L5695 - Addition to lower extremity, above knee, pelvic control, sleeve suspension, neoprene or equal, each L5696 - Addition to lower extremity, above knee or knee disarticulation, pelvic joint L5697 - Addition to lower extremity, above knee or knee disarticulation, pelvic band L5698 - Addition to lower extremity, above knee or knee disarticulation, Silesian bandage L5699 - All lower extremity prostheses, shoulder harness L5700 - Replacement, socket, below knee, molded to patient model L5701 - Replacement, socket, above knee/knee disarticulation, including attachment plate, molded to patient model L5702 - Replacement, socket, hip disarticulation, including hip joint, molded to patient model