HK1261564A1 - Medical chair - Google Patents

Description

Medical chair

Cross Reference to Related Applications

Priority is claimed in this application for united states provisional patent application serial No. 62/303,793 entitled "Surgical Support Surface," filed 3, 4, 2016, the disclosure of which is incorporated herein by reference in its entirety.

Technical Field

The teachings of the present invention relate generally to surgical support surfaces including medical chairs or tables, and more particularly to medical chairs or tables that may be repositioned into multiple positions.

Background

For example, lifting and reclining chairs of the type used during medical, dental and optical examinations and operations are known in the prior art. Many times, these chairs are powered by electric or hydraulic motors and can be moved vertically and/or reclined relative to the base to place the patient in a reclined or supine position. The chair is moved by the operator, i.e., the doctor, dentist or other medical professional, through a plurality of switches, which may be attached to the chair itself or form part of a separate switch panel or foot switch assembly. While various improvements have been made over the years to the switch and control systems for operating such power adjustable chairs, certain problems and undesirable aspects associated with past designs have become apparent.

Disclosure of Invention

The present invention relates generally to a movable chair, such as a medical examination chair, and more particularly to a movable chair utilizing a control system having a control button arrangement with a plurality of buttons that can send commands to a controller or directly to an actuator to reposition the chair as desired by a user.

In one embodiment, a medical chair having a plurality of adjustable positions is provided, including a platform configured to support the medical chair, a seat operatively connected to the platform, a leg rest pivotably coupled to the seat, and a backrest pivotably coupled to the seat. The stanchion comprises a plurality of supports, wherein a first one of the supports is fixedly coupled to the platform and a second one of the supports is operatively coupled to the seat, wherein in a first position of the seat relative to the platform, the plurality of supports are nested to position the seat at a lowest elevation and in a second position, the plurality of supports are extended to position the seat at a highest elevation. A leg rest actuator is rotatably coupled to the leg rest. The back actuator is rotatably coupled to the back rest. The seat position actuator is fixedly coupled to one of the plurality of supports of the strut and rotatably coupled to the seat.

In another embodiment, a medical chair having a plurality of adjustable positions is provided, including a seat and a platform configured to support the seat. The stanchion comprises a plurality of nested supports, wherein a first of the supports is fixedly coupled to the platform and a second of the supports is operatively coupled to the seat, wherein the nested supports telescopically extend when the seat is positioned relative to the platform. The joined cable carriers are located within a housing, wherein the housing extends from the platform toward the seat and is disposed adjacent to the stanchion.

Drawings

The above-mentioned aspects of the invention and the manner of attaining them will become more apparent and the invention itself will be better understood by reference to the following description of embodiments of the invention taken in conjunction with the accompanying drawings, wherein:

fig. 1 is a front perspective view of the medical chair.

Fig. 2 is a rear perspective view of the medical chair.

Fig. 3 is an elevational side view of the chair.

FIG. 4 is a perspective view of a latch configured to lock and unlock the arm rest position.

Fig. 5a is a perspective view of the latch in an extended position to lock the position of the arm rest.

Fig. 5b is a perspective view of the latch in a released position to enable movement of the arm rest.

Fig. 6 is a perspective view of a component located below a seat on one side of the chair.

Fig. 7 is a perspective view of a component located under the seat on the other side of the chair.

FIG. 8 is a control button arrangement configured to adjust the position of a medical chair.

Fig. 9 is a front elevational view of the chair.

Fig. 10 is a rear perspective view of the medical chair.

Fig. 11 is an elevational rear view of the chair.

Figure 12 is an elevational side view of the chair.

FIG. 13 is an elevational side view of the chair with the head portion at the same plane as the seat portion.

Figure 14 is an elevational side view of the chair in the Trendelenburg position.

Detailed Description

The embodiments of the present invention described below are not intended to be exhaustive or to limit the invention to the precise forms disclosed in the following detailed description. Rather, the embodiments are chosen and described so that others skilled in the art may appreciate and understand the principles and practices of the present invention.

In this regard, the present invention is illustrated in the several figures and is of sufficient complexity such that many of the components, interrelationships, and sub-combinations thereof cannot be clearly or meaningfully illustrated in the single patent type figures at all. Accordingly, several of the accompanying drawings are schematically illustrated or omitted in unnecessary detail in the drawings to describe certain features, aspects or principles of the disclosed invention. Thus, the best mode of a particular feature may be shown in one drawing and the best mode of another feature may be called out in another drawing.

The mobile chair 100 is shown in figure 1. The chair 100 may have a seat 102 coupled to a base 104. The seat 102 may be a portion of the chair 100 that is substantially horizontal relative to the ground and sized and positioned to allow a user to sit thereon. While the seat 102 has been described as being horizontal to the ground, the present disclosure is not limited to this configuration. Rather, the seat can have any angular orientation relative to the ground, yet allow a user to sit thereon. In one non-exclusive example, the seat 102 may be slightly angled relative to the ground.

The base 104 may be coupled to a platform 118 that is sized to allow the chair 100 to be positioned on an underlying surface. The platform 118 may provide sufficient support to maintain a desired orientation of the seat 102 and other components coupled thereto when the chair 100 is repositioned relative to an underlying surface. In one non-exclusive example, the platform 118 may extend rearwardly from below the front portion 106 of the seat 102 past the rear portion 108 of the seat 102. Further, the platform 118 may extend far enough past the rear portion 108 of the seat 102 to substantially maintain contact with an underlying surface when the chair 100 is moved to different positions. In other words, the platform 118 extends far enough away from the rear 108 of the seat 102 to prevent the chair 100 from tipping over backwards.

The platform 118 includes a contoured edge 120 that extends along a longitudinal axis 122 of the chair 100. The platform includes a first end 124 toward the front of the chair 100 and a second end 126 toward the rear of the chair 100. The first portion 128 of the platform 118 is located closer to the longitudinal axis 122 than the second portion 130 is to the longitudinal axis. In addition, the second portion 130 is elevated relative to the rest of the platform 118.

The chair 100 may also have a backrest 110 pivotally coupled to the base 104 at the rear 108 of the seat 102. The backrest 110 may provide support for the user's back and shoulders when the user is seated in the chair 100. In addition, the chair 100 may also have a leg rest 112 that is pivotally coupled to the front portion 106 of the seat 102. The leg rest 112 and backrest 110 may be repositioned relative to the seat 102 to manipulate the angle of the user's legs, torso, and back relative to each other.

Similarly, the chair 100 may have a head rest 114 positioned at one end of the backrest 110. Head rest 114 may be movably coupled to backrest 110 to allow head rest 114 to be positioned in a plurality of different orientations relative to backrest 110. Further, an arm rest 116 may be coupled to the base 104 at each side of the seat 102. Arm rest 116 may also be repositioned between raised and lowered positions.

Each of the arm rest 116, head rest 114, backrest 110, seat 102, and leg rest 112 may be a structural member having a cushion element coupled thereto via a material trim. The respective structural member may determine the positioning of the respective component, while the cushion element and the material trim may be positioned to increase the comfort of the user.

Referring now to fig. 2, a rear view of the chair 100 is shown. In the rear view of the chair 100, at least one rail 202 is shown coupled to the backrest 110. The track 202 may be coupled to the backrest via a track mount 204 and extend partially between the rear portion 108 and the head rest 114. The head rest 114 may be coupled to the backrest 110 using a linkage or link 206. The head rest 114 may be selectively repositioned by the linkage 206 by engaging the clamp arm 208. When the clamp arm 208 is in the disengaged position, the head rest 114 may be repositioned by pivoting about the connection (or joint) of the linkage 206. When the position of the head rest 114 is in the desired orientation, the clamping arm 208 may be engaged to substantially limit the pivoting of the linkage 206 about the connection. Thus, the position of head rest 114 relative to backrest 110 is dependent on the engagement of clamping arms 208 of linkage 206.

Also shown in fig. 2 is a roll holder 210. The roll holder 210 may be coupled to the backrest 110 at a lower portion and extend away from the backrest 110 to form an arc of substantially 180 degrees. The roll holder 210 may terminate in an orientation between the head rest 114 and the backrest 110. In one embodiment, a paper roll may be positioned within the roll holder 210 to allow the paper roll to extend between the back 110 and the head rest 114 to cover the back 110, seat 102, and/or leg rest 112 of the chair 100.

Referring now to fig. 3, an elevational side view of the chair 100 is shown. Also shown in fig. 3 is support member 302 extending from pivot housing 304 to arm rest 116. In one embodiment, there may be two support members 302 extending between arm rest 116 and pivot housing 304. The two support members 302 may be substantially parallel to each other and spaced apart from each other. Further, each of the two support members 302 may be pivotable at either end.

Pivot housing 304 may also have a latch 306 for selectively locking the two support members 302, and in turn arm rest 116, in the raised position shown in fig. 3. The pivot housing 304 may have one or more springs positioned therein to bias the latch 306 toward the locked position. When arm rest 116 is in the raised position, latch 306 may substantially limit support member 302 from pivoting to any other orientation.

The housing 310 extends from the platform 118 and includes a first housing piece 312, a second housing piece 314, and a third housing piece 316. The housing 310 is telescopically extendable with the post 602 as shown in fig. 7. The attached cable carrier 318 is located within the housing and extends with the housing when the seat 100 is raised. See fig. 2.

Referring now to fig. 4, the latch 306 is shown with the cover removed from the pivot housing 304. More specifically, each support member 302 may be pivotable about a support axis 402. The pivot stop 406 may be positioned along one end of the support member 302 positioned toward the front 106 of the chair 100. The support member 302 may pivot about the support axis 402 in a rising direction as indicated by arrow 408 until it contacts the contact surface 404 of the pivot stop 406. When support member 302 contacts pivot stop 406, arm rest 116 may be in a fully raised position. Further, once arm rest 116 is in the fully raised position, locking block 410 may interfere with rotation of support member 302 toward rear 108, thereby restricting support member 302 from pivoting about respective support axis 402 in lower direction 412. Further, latch 306 may be selectively engageable by a user to slide locking block 410 without interfering with support member 302, thereby allowing arm rest 116 to become disposed in the lowered position.

The movement of the locking block 410 can be more clearly illustrated with reference to fig. 5a and 5 b. More specifically, referring to fig. 5a, the locking block 410 is shown in an extended position, thereby interfering with rotation of the rear support member 302 in a lowering direction as indicated by arrow 412. In the embodiment shown in fig. 5a, arm rest 116 may be substantially locked in the raised position. In one embodiment, the lock block 410 may be biased in an extended position with one or more springs positioned between the lock block 410 and the pivot housing 304.

Alternatively, in fig. 5b, the locking block 410 is shown in the release position 500. When a user applies a force to the latch 306 in the direction indicated by arrow 502, the locking block 410 may become disposed in the release position. If the locking block 410 is in the released position, the support members 302 may be rotated about their respective support axes 402 in the lowering direction 412 because the locking block 410 no longer interferes with the bottom of the rear support member 302. Once the support member 302 is at least partially rotated in the lowering direction 412, the user may release the latch 306 and the locking block 510 may be held in the release position 500, via contact with the lower portion of the support member 302, which contacts the outer surface 504 of the locking block 410 to hold the locking block in the release position.

In one aspect of the arm rest assembly described above, the pivot stop 406 may also define the angular orientation of the support member 302 in the lowered position. More specifically, the pivot stop 406 may be angled with respect to a substantially horizontal plane. When the support member 302 is transitioned to the lowered position, the support arm toward the front of the chair 100 may pivot in the lowering direction 412 until it rests on the surface of the pivot stop 406. Thus, the angular orientation of front support member 302 is determined by pivot stops 406, and the angular orientation of rear support member 302 is determined by its pivotal coupling with arm rest 116 and pivot housing 304. Those skilled in the art will understand and appreciate herein that each support member 302 is pivotably coupled at each end, and that rotation of one support member 302 necessarily requires rotation of the other.

In another aspect of the pivot housing 304, the components coupled thereto may be substantially reversible to become positioned on either side of the chair 100. More specifically, the pivot stop 406 may be coupled to the pivot housing 304 at a center coupled location when the pivot housing 304 is positioned on either side of the chair 100. However, the pivot housing 304 may also provide first and second offset coupling orientations on either side of a center coupling orientation that corresponds to the respective side of the chair 100 on which the pivot housing 304 is mounted. Thus, if pivot housing 304 is mounted on a first side of chair 100, the pivot stop may be coupled to the center coupling orientation and the first offset coupling orientation to allow arm rest 116 to become oriented in the aforementioned position. Alternatively, if pivot housing 304 is mounted on the second side of the chair, pivot stop 406 may be coupled to the center coupling orientation and the second offset coupling orientation to allow arm rest 116 to become oriented in the aforementioned position. Similarly, the respective support arms 302 may have multiple coupling orientations defined in the pivot housing 304 to allow the same pivot housing 304 to be utilized regardless of the side of the chair 100 on which the pivot housing is mounted.

Referring now to fig. 6, a perspective view of the internal components of the chair 100 is shown. More specifically, a stanchion 602 is shown with the platform 118 and other coverings removed. The stanchion 602 may telescopically alter the height of the chair 100 relative to the underlying ground. Additionally, one or more actuators may be coupled to components of chair 100 to allow further control over the positioning of backrest 110, seat 102, and leg rest 112. More specifically, in one embodiment, the backrest actuator 604 may be coupled to a portion of the seat 102 at one end 608 and coupled to a portion of the backrest 110 at another end 610. In this configuration, the length of the backrest actuator 604 may be selectively controlled to change the angular orientation of the backrest 110 relative to the seat 102. The backrest mount 606 may be coupled to a portion of the backrest 110 at one end and pivotably coupled to the backrest actuator 604 at another end. The back bracket 606 may provide sufficient strength to allow the back actuator 604 to reposition the back 110 relative to the seat 102 while a user is seated in the chair 100.

Referring now to fig. 7, a leg rest actuator 702 is shown. The leg rest actuator 702 may be coupled at one end to a portion of the seat 102 and at another end to a portion of the leg rest 112. The leg rest actuator 702 may also be selectively repositioned to change the angular orientation of the leg rest 112 relative to the seat 102 about the leg rest axis 704.

The seat position actuator 706 is also shown in fig. 7. The seat position actuator 706 may be coupled to a portion of the strut 602 at one end 712 and coupled to a portion of the seat 102 at another end 714. The seat position actuator 706 may also be selectively repositioned to change the angular orientation of the seat 102 relative to the strut 602 about the strut axis 708. The post 602 extends along a post longitudinal axis 710 that is substantially perpendicular to the axis 708.

Thus, the position of the backrest 110 relative to the seat 102 may be changed by the backrest actuator 604, the position of the leg rest 112 relative to the seat 102 may be changed by the leg rest actuator 702, the position of the seat 102 relative to the post 602 may be changed by the seat position actuator 706, and the height of the seat 102 relative to an underlying surface may be changed by the post 602.

As shown in fig. 7 and 6, the seat position actuator 706 includes an end coupled to the post 602, an end 712 coupled to the post 602, and an end 714 coupled to the leg rest 112. The seat position actuator 706 is located in the center of the seat 100, and the leg rest actuator 702 and the backrest actuator 604 are located on opposite sides of the seat position actuator 706.

The actuators shown and described above may be any type of actuator known in the art. More specifically, an electric actuator, a hydraulic actuator, a pneumatic actuator, or the like may be used. Similarly, any other similar components may be used. In one embodiment, a scissor jack or similar rotary jack may be used. Accordingly, the present disclosure is not limited to any particular type of actuator or device for repositioning the above-described components.

Referring now to FIG. 8, a control button layout 800 is shown. More specifically, the control button arrangement 800 may have a plurality of buttons that may send commands to the controller or directly to the actuators to reposition the chair 100 as desired by the user. In one embodiment, the control button arrangement 800 may have chair up and chair down buttons 802. The chair up/down button 802 may control an actuator within the strut 602 to change the height of the chair 100 relative to the underlying ground. The chair up/down button 802 may have a first button to raise the chair 100 and a second button to lower the chair 100.

The control button arrangement 800 may also have back up and back down buttons 804. The backrest up/down button 804 may control the backrest actuator 604 to change the position of the backrest 110 of the chair 100 relative to the seat 102. The backrest up/down button 804 may have a first button to pivot the backrest 110 away from the seat 102 and a second button to pivot the backrest 110 toward the seat 102.

The control button arrangement 800 may also have tilt up and tilt down buttons 806. The tilt up/down button 806 may control the seat position actuator 706 to change the position of the seat 102 of the chair 100 relative to the seat post 602 and, in turn, relative to an underlying surface. The tilt up/down button 806 may have a first button to tilt the seat 110 toward the backrest 110 and a second button to tilt the seat 102 toward the leg rest 112. The tilt up/down button 806 may also tilt the backrest 110 and leg rest 112 along with the seat 102. More specifically, because the leg rest actuator 702 and the backrest actuator 604 are coupled to the seat 102, when the seat 102 tilts, the leg rest 112 and the backrest 110 will also tilt therewith.

The control button arrangement 800 may also have leg rest up and leg rest down buttons 808. A leg rest up/down button 808 may control the leg rest actuator 702 to change the position of the leg rest 112 of the chair 100 relative to the seat 102. Leg rest up/down button 808 may have a first button that pivots leg rest 112 away from platform 118 and a second button that pivots leg rest 112 toward platform 118.

The control button arrangement 800 may also have one or more program buttons 810, a trendelenberg button 812, and a main button 814. The user may select the program button 810 to reposition the chair 100 to a previously stored position. More specifically, a user may utilize chair up/down button 802, back up/down button 804, tilt up/down button 806, and leg rest up/down button 808 to position chair 100 in any desired position. Once the user has positioned the chair 100 as desired, the user may program that position to one of the program buttons 810. The particular orientation of the chair 100 may be saved to a memory unit and each time the user selects, the corresponding program button 810 may return the chair 100 to that position.

Similarly, the trendelenberg button 812 may automatically utilize the actuators described above to orient the chair 100 in the trendelenberg position. The user may select the home button 814 to return the chair to the home position. A lock or stop button 816 is also provided.

In one embodiment, the control button layout 800 may be positioned on a manual controller for manipulation by a user. The manual controller may communicate with the chair 100 via wire or any known wireless method to reposition the chair as instructed. Alternatively or additionally, the control button arrangement 800 may be positioned on a foot switch for manipulation by a user. The foot pedal may also communicate with the chair 100 via wire or any known wireless method to reposition the chair as instructed.

While the buttons 802 and 816 have been shown and described above, the present disclosure is not limited to the use of buttons. More specifically, in one embodiment, a touch screen or other similar device may be used. Further, in one embodiment, the control system may be mounted on any type of computing device to control the position of the chair 100. More specifically, desktop computers, cell phones, tablets, laptops, etc. may have a control system mounted thereon that allows the device to control the positioning of the chair 100.

Figures 9, 10, 11, and 12 show the chair 100 in a raised position with the post 602 and housing 310 in an extended position. As shown in fig. 2 and 3. Each of the housing 310 and the strut 602 are in a folded or collapsed position. The housing 310 and the post 602 are positioned adjacently, which reduces the area required to support the chair with the platform 118. The reduced area, along with the configuration of the contoured edge 120, increases the amount of area available for medical personnel to provide surgery to an individual supported by the chair.

The strut 602 includes a plurality of supports including a first support 902, a second support 904, and a third support 906. To move the chair up and/or down, the buttons 802 control actuators within the struts 602 to change the height of the chair 100 relative to the platform 118. Because the seat actuator 706 is coupled to the third support 906, movement of the third support 906 raises the seat relative to the platform 118 as the actuator extends the strut 602 from the lowermost position to the extended position.

Figure 13 illustrates another position of the chair 100 using the control button arrangement 800. In this position, the backrest button 804 is used to move the backrest 110 into planar alignment with the seat 102. With leg rest button 808, leg rest 112 is in a downward position.

Figure 14 shows the trendelenberg position of the chair 100. The location is selected using the trendelenberg button 812. In one embodiment, button 812 sets the trendelenberg position to a 15 degree tilt. In this position, the back 110, seat 102 and leg rest 112 provide a planar support surface, but are angled at a head down position.

Although exemplary embodiments incorporating the principles of the present disclosure have been disclosed herein, the present disclosure is not limited to the disclosed embodiments. On the contrary, this application is intended to cover any variations, uses, or adaptations of the disclosure using its general principles. Further, this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains.

The terminology used herein is for the purpose of describing particular illustrative embodiments only and is not intended to be limiting. As used herein, the singular forms "a," "an," and "the" may also be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be employed.

When an element or layer is referred to as being "on," "engaged to," "connected to" or "coupled to" another element or layer, it can be directly on, engaged, connected or coupled to the other element or layer or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on," "directly engaged to," "directly connected to" or "directly coupled to" another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between.. versus" directly between.. versus, "adjacent" versus "directly adjacent," etc.). As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. As used herein, terms such as "first," "second," and other numerical terms do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

Spatially relative terms, such as "inner," "outer," "below," "lower," "above," "upper," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s), as illustrated. Spatially relative terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations).

The appendix, attached hereto and included in this application, includes various additional descriptions and figures that depict other aspects of some of the embodiments of the disclosure. These additional materials are intended to form part of this application and, as such, their contents are expressly incorporated herein by reference in their entirety.

Claims (20)

1. A medical chair having a plurality of adjustable positions, comprising:

a platform configured to support the medical chair;

a seat operatively connected to the platform;

a leg rest pivotably coupled to the seat;

a backrest pivotably coupled to the seat;

a support column comprising a plurality of supports, wherein a first one of the supports is fixedly coupled to the platform and a second one of the supports is operatively coupled to the seat, wherein in a first position of the seat relative to the platform, the plurality of supports are nested to position the seat at a lowest elevation and in a second position, the plurality of supports are extended to position the seat at a highest elevation; and

a leg rest actuator rotatably coupled to the leg rest, a back rest actuator rotatably coupled to a back rest, and a seat position actuator fixedly coupled to one of the plurality of supports of the strut and rotatably coupled to the seat.

2. The medical chair of claim 1, wherein the leg rest actuator is operatively connected to the seat.

3. The medical chair of claim 2, wherein the back actuator is operably coupled to the seat.

4. The chair of claim 1, wherein the plurality of supports telescopically vary the height of the seat relative to the platform.

5. The medical chair of claim 1, wherein the seat position actuator is located in the center of the seat and the leg rest actuator and the backrest actuator are located on opposite sides of the seat position actuator.

6. The medical chair of claim 5, wherein the seat position actuator is selectively repositionable to change an angular orientation of the seat relative to the strut.

7. The medical chair of claim 1, wherein each of the plurality of supports of the strut is aligned along a longitudinal axis that is substantially perpendicular to a lateral axis defined by the strut.

8. The chair of claim 7, wherein the plurality of supports of the strut includes at least three supports, wherein a first of the supports is an innermost support fixedly coupled to the platform and a second of the supports is an outermost support fixedly coupled to the seat position actuator, and a third of the supports is an intermediate support located between the innermost support and the outermost support.

9. The medical chair of claim 8, further comprising an actuator within the strut configured to change the height of the chair.

10. The medichair of claim 1, wherein the platform defines a contoured edge extending along a longitudinal axis of the medichair, including a first portion positioned closer to the longitudinal axis than a second portion positioned to the longitudinal axis.

11. The medical chair of claim 4, wherein the second portion includes a first end disposed toward the leg rest and a second end disposed behind the backrest, wherein the second end includes a raised portion.

12. The medical chair of claim 1, further comprising an attached cable carrier within a housing, wherein the housing extends from the platform toward the seat and is disposed adjacent to the strut.

13. The chair of claim 12, wherein the housing includes at least two housing pieces, wherein the two housing pieces are telescopically extendable when the seat is positioned from the first position to the second position.

14. A medical chair having a plurality of adjustable positions, comprising:

a seat portion;

a platform configured to support the seat;

a support column comprising a plurality of nested supports, wherein a first one of the supports is fixedly coupled to the platform and a second one of the supports is operably coupled to the seat, wherein the nested supports are telescopically extendable when the seat is positioned relative to the platform; and

a linked cable carrier within a housing, wherein the housing extends from the platform toward the seat and is disposed adjacent to the strut.

15. The medical chair of claim 14, wherein the plurality of supports of the strut includes at least three supports, wherein a first one of the supports is an innermost support fixedly coupled to the platform and a second one of the supports is an outermost support fixedly coupled to the seat and a third one of the supports is an intermediate support located between the innermost support and the outermost support.

16. The chair of claim 15, wherein the housing comprises at least two housing pieces, wherein the housing is telescopically extendable relative to the platform.

17. The medical chair of claim 16, further comprising:

a leg rest pivotably coupled to the seat;

a backrest pivotably coupled to the seat;

a leg rest actuator rotatably coupled to the leg rest, a back rest actuator rotatably coupled to a back rest, and a seat position actuator fixedly coupled to the outermost support of the plurality of supports and rotatably coupled to the seat.

18. The medical chair of claim 17, wherein the seat position actuator is located in the center of the seat and the leg rest actuator and the backrest actuator are located on opposite sides of the seat position actuator.

19. The medichair of claim 18, wherein the platform defines a contoured edge extending along a longitudinal axis of the medichair, including a first portion positioned closer to the longitudinal axis than a second portion positioned to the longitudinal axis.

20. The medical chair of claim 19, wherein the second portion includes a first end disposed toward the leg rest and a second end disposed behind the backrest, wherein the second end includes a raised portion.