CN221106581U - Peritoneal dialysis joint and peritoneal dialysis drainage device - Google Patents
Peritoneal dialysis joint and peritoneal dialysis drainage device Download PDFInfo
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- CN221106581U CN221106581U CN202322235879.5U CN202322235879U CN221106581U CN 221106581 U CN221106581 U CN 221106581U CN 202322235879 U CN202322235879 U CN 202322235879U CN 221106581 U CN221106581 U CN 221106581U
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- 238000000502 dialysis Methods 0.000 title claims abstract description 61
- 239000007788 liquid Substances 0.000 claims abstract description 29
- 239000002699 waste material Substances 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 210000000683 abdominal cavity Anatomy 0.000 claims description 5
- 210000001015 abdomen Anatomy 0.000 claims 2
- 230000006978 adaptation Effects 0.000 claims 1
- 239000003330 peritoneal dialysis fluid Substances 0.000 description 24
- 239000000243 solution Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 5
- 208000004998 Abdominal Pain Diseases 0.000 description 2
- 230000008822 capillary blood flow Effects 0.000 description 2
- 210000004303 peritoneum Anatomy 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 206010014418 Electrolyte imbalance Diseases 0.000 description 1
- 101001121408 Homo sapiens L-amino-acid oxidase Proteins 0.000 description 1
- 101000827703 Homo sapiens Polyphosphoinositide phosphatase Proteins 0.000 description 1
- 102100026388 L-amino-acid oxidase Human genes 0.000 description 1
- 102100023591 Polyphosphoinositide phosphatase Human genes 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 101100012902 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) FIG2 gene Proteins 0.000 description 1
- 101100233916 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) KAR5 gene Proteins 0.000 description 1
- 241000973497 Siphonognathus argyrophanes Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229940085771 feverall Drugs 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 210000004379 membrane Anatomy 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003200 peritoneal cavity Anatomy 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
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Abstract
Description
技术领域Technical Field
本实用新型涉及腹膜透析技术领域,具体为一种腹膜透析接头及腹膜透析引流装置。The utility model relates to the technical field of peritoneal dialysis, in particular to a peritoneal dialysis joint and a peritoneal dialysis drainage device.
背景技术Background technique
腹膜透析是利用腹膜作为半渗透膜的特性,通过重力作用将配制好的透析液规律、定时经导管灌入患者的腹膜腔,由于在腹膜两侧存在溶质的浓度梯度差,高浓度一侧的溶质向低浓度一侧移动,水分则从低渗一侧向高渗一侧移动,通过腹腔透析液不断地更换,以达到清除体内代谢产物、毒性物质及纠正水、电解质平衡紊乱的目的。Peritoneal dialysis utilizes the properties of the peritoneum as a semi-permeable membrane. The prepared dialysate is regularly and regularly infused into the patient's peritoneal cavity through a catheter via gravity. Due to the difference in solute concentration gradient on both sides of the peritoneum, the solute on the high-concentration side moves to the low-concentration side, and the water moves from the hypotonic side to the hypertonic side. The peritoneal dialysis fluid is continuously replaced to achieve the purpose of removing metabolic products and toxic substances from the body and correcting water and electrolyte imbalances.
现有的一种腹膜透析接头及腹膜透析引流装置可参考授权公告号为CN219022980U的中国实用新型专利,其公开了一种腹膜透析接头及腹膜透析引流装置,“腹膜透析接头包括腹膜透析接口和腹膜透析保护帽;所述腹膜透析接口用于连接出液管、进液管和腹膜透析外接短管;所述腹膜透析接口与腹膜透析外接短管连接的一端设置有延长段,当腹膜透析外接短管与腹膜透析接口连接后,腹膜透析外接短管的端口能完全置于延长段内;所述腹膜透析保护帽的一端为开口端,另一端为封闭端,所述腹膜透析保护帽采用间隙配合方式设置在腹膜透析接口的外壁。本发明的腹膜透析接头的管口进行了加长设计,能够避免腹膜透析外接短管端口暴露在外,且采用保护帽封闭,不会导致腹膜透析接口被污染。”An existing peritoneal dialysis connector and peritoneal dialysis drainage device can refer to the Chinese utility model patent with the authorization announcement number CN219022980U, which discloses a peritoneal dialysis connector and a peritoneal dialysis drainage device, "The peritoneal dialysis connector includes a peritoneal dialysis interface and a peritoneal dialysis protective cap; the peritoneal dialysis interface is used to connect the liquid outlet tube, the liquid inlet tube and the peritoneal dialysis external short tube; the peritoneal dialysis interface is provided with an extension section at one end connected to the peritoneal dialysis external short tube, and when the peritoneal dialysis external short tube is connected to the peritoneal dialysis interface, the port of the peritoneal dialysis external short tube can be completely placed in the extension section; one end of the peritoneal dialysis protective cap is an open end, and the other end is a closed end, and the peritoneal dialysis protective cap is arranged on the outer wall of the peritoneal dialysis interface in a gap-fitting manner. The tube mouth of the peritoneal dialysis connector of the present invention is lengthened to prevent the peritoneal dialysis external short tube port from being exposed to the outside, and is closed with a protective cap, which will not cause the peritoneal dialysis interface to be contaminated."
上述设备在使用时,利用腹膜透析接头管口加长设计,从而避免腹膜透析外接短管端口暴露在外,并利用保护帽封闭,但上述装置在使用过程中,腹透液在使用前需要记性加热,腹透液过冷或过热灌入腹腔时,都会给患者造成不良影响,如果温度太低,患者会出现寒颤、腹痛,温度过高,患者有全身发热感,且腹腔内毛细血管血流速度加快,蛋白质从腹透液丢失增加,且腹透液在使用过程中,腹透液本体温度易发生变化,从而影响腹透液的使用,进而影响装置的稳定使用。When the above-mentioned equipment is in use, the peritoneal dialysis connector tube port is lengthened to avoid exposure of the peritoneal dialysis external short tube port to the outside, and the device is sealed with a protective cap. However, during the use of the above-mentioned device, the peritoneal dialysis fluid needs to be heated before use. When the peritoneal dialysis fluid is too cold or too hot and poured into the abdominal cavity, it will cause adverse effects on the patient. If the temperature is too low, the patient will experience chills and abdominal pain. If the temperature is too high, the patient will feel feverish all over the body, and the capillary blood flow rate in the abdominal cavity will accelerate, and the loss of protein from the peritoneal dialysis fluid will increase. In addition, during the use of the peritoneal dialysis fluid, the temperature of the peritoneal dialysis fluid itself is prone to change, thereby affecting the use of the peritoneal dialysis fluid and further affecting the stable use of the device.
因此,亟需一种腹膜透析接头及腹膜透析引流装置。Therefore, there is an urgent need for a peritoneal dialysis connector and a peritoneal dialysis drainage device.
实用新型内容Utility Model Content
针对现有技术的不足,本实用新型提供了一种腹膜透析接头及腹膜透析引流装置,以解决上述背景技术中提出的问题。In view of the deficiencies of the prior art, the utility model provides a peritoneal dialysis connector and a peritoneal dialysis drainage device to solve the problems raised in the above background technology.
本实用新型提供如下技术方案:一种腹膜透析接头及腹膜透析引流装置,包括外壳,所述外壳的内壁粘贴有加热板,所述外壳的底部开设有槽口,所述外壳的内壁搭接有腹透液袋,所述腹透液袋的顶部固定装配有挂接板,所述腹透液袋的底部出液口固定套接有连接管一,所述外壳的侧面设置有废液袋,所述废液袋的底部出液口固定套接有连接管二,所述外壳的外沿固定装配有放置框。The utility model provides the following technical solutions: a peritoneal dialysis connector and a peritoneal dialysis drainage device, comprising a shell, an inner wall of the shell is pasted with a heating plate, a bottom of the shell is provided with a notch, a peritoneal dialysis fluid bag is overlapped on the inner wall of the shell, a hanging plate is fixedly mounted on the top of the peritoneal dialysis fluid bag, a connecting pipe 1 is fixedly sleeved on the bottom liquid outlet of the peritoneal dialysis fluid bag, a waste liquid bag is arranged on the side of the shell, a connecting pipe 2 is fixedly sleeved on the bottom liquid outlet of the waste liquid bag, and a placement frame is fixedly mounted on the outer edge of the shell.
作为本实用新型的一种优选技术方案,所述外壳的内壁固定装配有定磁铁一,所述外壳内壁远离定磁铁一的一端固定装配有定磁铁二,且定磁铁二的形状大小与定磁铁一的形状大小相适配。As a preferred technical solution of the utility model, the inner wall of the shell is fixedly equipped with a fixed magnet 1, and the end of the inner wall of the shell away from the fixed magnet 1 is fixedly equipped with a fixed magnet 2, and the shape and size of the fixed magnet 2 are compatible with the shape and size of the fixed magnet 1.
作为本实用新型的一种优选技术方案,所述连接管一远离外壳的一端固定装配有圆框,所述圆框的内壁转动连接有限位框,所述限位框的内壁开设有圆槽,且圆槽内壁的直径大小与连接管一内壁的直径大小相适配,所述圆框的侧面固定装配有引流管,且引流管的内壁与限位框的内壁相连通。As a preferred technical solution of the utility model, a circular frame is fixedly installed at one end of the connecting tube away from the outer shell, the inner wall of the circular frame is rotatably connected to the limiting frame, a circular groove is opened on the inner wall of the limiting frame, and the diameter of the inner wall of the circular groove is adapted to the diameter of the inner wall of the connecting tube, a drainage tube is fixedly installed on the side of the circular frame, and the inner wall of the drainage tube is connected to the inner wall of the limiting frame.
作为本实用新型的一种优选技术方案,所述限位框的外沿固定装配有卡框,所述卡框的内壁固定连接有弹簧,所述弹簧远离卡框内壁的一端固定连接有扇型卡块。As a preferred technical solution of the utility model, a card frame is fixedly installed on the outer edge of the limit frame, a spring is fixedly connected to the inner wall of the card frame, and a fan-shaped card block is fixedly connected to one end of the spring away from the inner wall of the card frame.
作为本实用新型的一种优选技术方案,所述圆框的内壁开设有卡槽,且扇型卡块的外沿与卡槽的内壁转动连接。As a preferred technical solution of the utility model, a clamping groove is provided on the inner wall of the circular frame, and the outer edge of the fan-shaped clamping block is rotatably connected to the inner wall of the clamping groove.
作为本实用新型的一种优选技术方案,所述圆框的内壁滑动连接有推杆,所述推杆的侧面固定装配有推板。As a preferred technical solution of the utility model, a push rod is slidably connected to the inner wall of the circular frame, and a push plate is fixedly mounted on the side of the push rod.
与现有技术对比,本实用新型具备以下有益效果:Compared with the prior art, the utility model has the following beneficial effects:
1、该腹膜透析接头及腹膜透析引流装置,通过推杆与推板的配合使用,向圆框内壁的方向移动推杆,从而使推杆带动推板移动,进而利用推板带动扇型卡块移动,之后转动限位框,从而使圆槽的内壁由连接管一转变为连接管二,进而利用连接管二辅助废液排出至废液袋,相比较传统的装置,利用蓝夹子与短管的辅助配合调节,本装置调节更加便捷。1. The peritoneal dialysis connector and the peritoneal dialysis drainage device, through the cooperation of the push rod and the push plate, move the push rod toward the inner wall of the circular frame, so that the push rod drives the push plate to move, and then the push plate drives the fan-shaped block to move, and then the limit frame is rotated, so that the inner wall of the circular groove is transformed from the connecting tube 1 to the connecting tube 2, and then the connecting tube 2 is used to assist the waste liquid to be discharged into the waste liquid bag. Compared with the traditional device, the device is more convenient to adjust by using the auxiliary cooperation of the blue clamp and the short tube.
2、该腹膜透析接头及腹膜透析引流装置,通过加热板与外壳的配合使用,将腹透液袋放置于外壳的内壁中,直至腹透液袋的底部与外壳内壁的底部搭接,之后转动外壳,直至定磁铁一的侧面与定磁铁二的侧面相吸附,从而利用外壳对腹透液袋稳定限位,且利用加热板对腹透液袋稳定辅助控温,从而保障腹透液袋稳定使用。2. The peritoneal dialysis connector and the peritoneal dialysis drainage device, through the coordinated use of the heating plate and the outer shell, place the peritoneal dialysis fluid bag in the inner wall of the outer shell until the bottom of the peritoneal dialysis fluid bag overlaps with the bottom of the inner wall of the outer shell, and then rotate the outer shell until the side of the fixed magnet one is attracted to the side of the fixed magnet two, so that the outer shell is used to stably limit the peritoneal dialysis fluid bag, and the heating plate is used to stably assist in temperature control of the peritoneal dialysis fluid bag, thereby ensuring stable use of the peritoneal dialysis fluid bag.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1为本实用新型立体结构示意图;FIG1 is a schematic diagram of the three-dimensional structure of the utility model;
图2为本实用新型另一角度立体结构示意图;FIG2 is a schematic diagram of the three-dimensional structure of the utility model from another angle;
图3为本实用新型正剖结构示意图;Fig. 3 is a schematic diagram of the front cross-section structure of the utility model;
图4为本实用新型图3中A处放大结构示意图;FIG4 is an enlarged schematic diagram of the structure of point A in FIG3 of the present invention;
图5为本实用新型圆框正剖结构示意图;Figure 5 is a schematic diagram of the front cross-sectional structure of the circular frame of the utility model;
图6为本实用新型图5中B处放大结构示意图。FIG6 is an enlarged structural schematic diagram of point B in FIG5 of the present invention.
图中:1、外壳;2、加热板;3、槽口;4、挂接板;5、腹透液袋;6、废液袋;7、连接管一;8、连接管二;9、圆框;10、限位框;11、圆槽;12、卡框;13、弹簧;14、扇型卡块;15、推杆;16、推板;17、引流管;18、放置框;19、卡槽。In the figure: 1. shell; 2. heating plate; 3. notch; 4. mounting plate; 5. peritoneal dialysis fluid bag; 6. waste fluid bag; 7. connecting tube 1; 8. connecting tube 2; 9. round frame; 10. limit frame; 11. round groove; 12. clamping frame; 13. spring; 14. fan-shaped clamping block; 15. push rod; 16. push plate; 17. drainage tube; 18. placement frame; 19. clamping slot.
具体实施方式Detailed ways
下面将结合本实用新型实施例中的附图,对本实用新型实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本实用新型一部分实施例,而不是全部的实施例。基于本实用新型中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本实用新型保护的范围。The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
请参阅图1-6,一种腹膜透析接头及腹膜透析引流装置,包括外壳1,外壳1的内壁粘贴有加热板2,外壳1的底部开设有槽口3,外壳1的内壁搭接有腹透液袋5,腹透液袋5的顶部固定装配有挂接板4,腹透液袋5的底部出液口固定套接有连接管一7,外壳1的侧面设置有废液袋6,废液袋6的底部出液口固定套接有连接管二8,外壳1的外沿固定装配有放置框18,通过加热板2的加装,加热板2采用硅橡胶加热片,且加热板2控制温度为36°-38°,从而避免腹透液温度太低,患者会出现寒颤、腹痛,腹透液温度过高,患者有全身发热感,且腹腔内毛细血管血流速度加快,蛋白质从腹透液丢失增加。Please refer to Figures 1-6, a peritoneal dialysis connector and a peritoneal dialysis drainage device, including a shell 1, a heating plate 2 is pasted on the inner wall of the shell 1, a notch 3 is opened at the bottom of the shell 1, a peritoneal dialysis bag 5 is overlapped on the inner wall of the shell 1, a hanging plate 4 is fixedly installed on the top of the peritoneal dialysis bag 5, a connecting pipe 7 is fixedly sleeved on the bottom liquid outlet of the peritoneal dialysis bag 5, a waste liquid bag 6 is arranged on the side of the shell 1, a connecting pipe 2 8 is fixedly sleeved on the bottom liquid outlet of the waste liquid bag 6, and a placement frame 18 is fixedly installed on the outer edge of the shell 1. By adding the heating plate 2, the heating plate 2 adopts a silicone rubber heating plate, and the heating plate 2 controls the temperature to 36°-38°, so as to avoid the peritoneal dialysis fluid temperature being too low, the patient will experience chills and abdominal pain, and the peritoneal dialysis fluid temperature is too high, the patient will feel fever all over the body, and the capillary blood flow velocity in the abdominal cavity will be accelerated, and the protein loss from the peritoneal dialysis fluid will increase.
请参阅图1,外壳1的内壁固定装配有定磁铁一,外壳1内壁远离定磁铁一的一端固定装配有定磁铁二,且定磁铁二的形状大小与定磁铁一的形状大小相适配,通过定磁铁一与定磁铁二的配合使用,利用定磁铁一的侧面与定磁铁二的侧面相吸附,从而辅助外壳1对腹透液袋5稳定限位。Please refer to Figure 1. The inner wall of the shell 1 is fixedly equipped with a fixed magnet 1, and the end of the inner wall of the shell 1 away from the fixed magnet 1 is fixedly equipped with a fixed magnet 2, and the shape and size of the fixed magnet 2 are adapted to the shape and size of the fixed magnet 1. By using the fixed magnet 1 and the fixed magnet 2 in coordination, the side of the fixed magnet 1 is adsorbed with the side of the fixed magnet 2, thereby assisting the shell 1 to stably limit the peritoneal dialysis fluid bag 5.
请参阅图4,连接管一7远离外壳1的一端固定装配有圆框9,圆框9的内壁转动连接有限位框10,限位框10的内壁开设有圆槽11,且圆槽11内壁的直径大小与连接管一7内壁的直径大小相适配,圆框9的侧面固定装配有引流管17,且引流管17的内壁与限位框10的内壁相连通,通过限位框10与圆框9的配合使用,利用圆框9对限位框10辅助限位,从而利用限位框10控制圆槽11的内壁与连接管一7或连接管二8对接,进而控制装置内部引流。Please refer to Figure 4. A circular frame 9 is fixedly installed at one end of the connecting tube 7 away from the outer shell 1. The inner wall of the circular frame 9 is rotatably connected to a limiting frame 10. A circular groove 11 is opened on the inner wall of the limiting frame 10, and the diameter of the inner wall of the circular groove 11 is adapted to the diameter of the inner wall of the connecting tube 7. A drainage tube 17 is fixedly installed on the side of the circular frame 9, and the inner wall of the drainage tube 17 is connected to the inner wall of the limiting frame 10. By using the limiting frame 10 in coordination with the circular frame 9, the circular frame 9 is used to assist in limiting the limiting frame 10, so that the limiting frame 10 is used to control the inner wall of the circular groove 11 to dock with the connecting tube 1 7 or the connecting tube 2 8, thereby controlling the internal drainage of the device.
请参阅图6,限位框10的外沿固定装配有卡框12,卡框12的内壁固定连接有弹簧13,弹簧13远离卡框12内壁的一端固定连接有扇型卡块14,通过弹簧13与扇型卡块14的配合使用,利用弹簧13推动扇型卡块14,从而保障扇型卡块14的外沿与卡槽19的内壁稳定限位。Please refer to Figure 6. The outer edge of the limit frame 10 is fixedly equipped with a card frame 12, and the inner wall of the card frame 12 is fixedly connected to a spring 13. The end of the spring 13 away from the inner wall of the card frame 12 is fixedly connected to a fan-shaped card block 14. By using the spring 13 and the fan-shaped card block 14 in coordination, the spring 13 is used to push the fan-shaped card block 14, thereby ensuring that the outer edge of the fan-shaped card block 14 and the inner wall of the card slot 19 are stably limited.
请参阅图6,圆框9的内壁开设有卡槽19,且扇型卡块14的外沿与卡槽19的内壁转动连接,通过卡槽19的开设,从而利用卡槽19的内壁辅助扇型卡块14进行限位,进而辅助限位框10限位和调节。Please refer to Figure 6. A slot 19 is opened on the inner wall of the circular frame 9, and the outer edge of the fan-shaped block 14 is rotatably connected to the inner wall of the slot 19. By opening the slot 19, the inner wall of the slot 19 is used to assist the fan-shaped block 14 in limiting, thereby assisting the limiting frame 10 in limiting and adjusting.
请参阅图6,圆框9的内壁滑动连接有推杆15,推杆15的侧面固定装配有推板16,通过推杆15与推板16的加装,利用推杆15带动推板16,进而利用推板16辅助扇型卡块14进行位置调节。Please refer to Figure 6. The inner wall of the circular frame 9 is slidably connected with a push rod 15, and the side of the push rod 15 is fixedly equipped with a push plate 16. By installing the push rod 15 and the push plate 16, the push rod 15 drives the push plate 16, and then the push plate 16 assists the fan-shaped block 14 to adjust its position.
工作原理,当需要使用该装置时,将腹透液袋放5置于外壳1的内壁中,直至腹透液袋5的底部与外壳1内壁的底部搭接,之后转动外壳1,直至定磁铁一的侧面与定磁铁二的侧面相吸附,从而利用外壳1对腹透液袋5稳定限位,且利用加热板2对腹透液袋5稳定辅助控温,向圆框9内壁的方向移动推杆15,从而使推杆15带动推板16移动,进而利用推板16带动扇型卡块14移动,之后转动限位框10,从而使圆槽11的内壁由连接管一7转变为连接管二8,进而利用连接管二8辅助废液排出至废液袋6。Working principle: when the device is needed, the peritoneal dialysis fluid bag 5 is placed in the inner wall of the shell 1 until the bottom of the peritoneal dialysis fluid bag 5 overlaps with the bottom of the inner wall of the shell 1, and then the shell 1 is rotated until the side of the fixed magnet one is attracted to the side of the fixed magnet two, so that the shell 1 is used to stabilize the peritoneal dialysis fluid bag 5, and the heating plate 2 is used to stabilize and assist in temperature control of the peritoneal dialysis fluid bag 5, and the push rod 15 is moved toward the inner wall of the circular frame 9, so that the push rod 15 drives the push plate 16 to move, and then the push plate 16 drives the fan-shaped block 14 to move, and then the limit frame 10 is rotated, so that the inner wall of the circular groove 11 is transformed from the connecting tube 1 7 to the connecting tube 2 8, and then the connecting tube 2 8 is used to assist in the discharge of waste liquid into the waste liquid bag 6.
尽管已经示出和描述了本实用新型的实施例,对于本领域的普通技术人员而言,可以理解在不脱离本实用新型的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型,本实用新型的范围由所附权利要求及其等同物限定。Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
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