|Publication number||US20070258838 A1|
|Application number||US 11/416,753|
|Publication date||Nov 8, 2007|
|Filing date||May 3, 2006|
|Priority date||May 3, 2006|
|Publication number||11416753, 416753, US 2007/0258838 A1, US 2007/258838 A1, US 20070258838 A1, US 20070258838A1, US 2007258838 A1, US 2007258838A1, US-A1-20070258838, US-A1-2007258838, US2007/0258838A1, US2007/258838A1, US20070258838 A1, US20070258838A1, US2007258838 A1, US2007258838A1|
|Inventors||Scott Drake, Christopher Deborski, Donald McKelvey|
|Original Assignee||Sherwood Services Ag|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (13), Classifications (14), Legal Events (1)|
|External Links: USPTO, USPTO Assignment, Espacenet|
1. Technical Field
The present disclosure relates to cooling pumps and systems and, more particularly, to peristaltic cooling pumps and/or systems typically used to circulate sterile fluids and the like to a target surgical site and/or through a surgical instrument for cooling and the like.
2. Background of Related Art
A wide variety of pump types have been used in the past for pumping any number of a variety of different liquids for any of a number of different functions and applications. Typically, a peristaltic-type pump is used in connection with many medical applications and is applied externally of the fluid delivery tube. Thus, the peristaltic pump does not interfere with the sterile state which must be maintained for the infusion fluid within the fluid delivery tube.
Many peristaltic pumps are typically used in medical, biomedical and laboratory applications, including and not limited to, irrigation devices and/or systems, suction devices and/or systems, circulation devices and/or systems, and the like. One example of a peristaltic pump is shown schematically in
More particularly and as seen in
As further seen in
Typically, element 108, including the pump, is an integral part of control system 100. Accordingly, should the pump fail, break down, become contaminated or the like, the entire control system 100 needs to be replaced or extensive work performed on control system 100 in order to replace, remove, sterilize, dispose and/or otherwise treat the pump of element 108.
Accordingly, a need exists for improved pumps and/or systems for use with sterile fluids which overcome at least some of the deficiencies and/or drawbacks of existing pumps and/or systems. A need thus exists for improved pumps and/or pump systems that can be or are sterilized and that are used in connection with the transmission of sterile fluids.
A further need also exists for improved pumps and/or pump systems that can be selectively coupled and un-coupled to and from an ablation generator as needed and/or desired. Yet another need exists for improved pumps and/or pump systems having interchangeable components, which components may be each individually sterilizable, replaceable and/or disposable. A still further need exists for improved pumps and/or pump systems for use with cool-tip radiofrequency thermosurgery electrode system and improved pumps and/or pump systems having improved fluid management characteristics.
According to an aspect of the present disclosure, a peristaltic cooling pump system is provided and includes an actuation housing rotatably supporting a rotor assembly. The rotor assembly includes a plurality of rollers each having an axis of rotation parallel to an axis of rotation of the rotor assembly. The peristaltic cooling pump system further includes a cartridge selectively operably connectable to the actuation housing. The cartridge is configured to operatively support a tube. The tube is made of a resilient and selectively compressible material. Accordingly, when the cartridge is connected to the actuation housing the tube is in operative association with at least one roller of the rotor assembly.
The cartridge may include a supporting body having a pair of spaced apart arms, wherein a first arm defines a lumen formed near a free end thereof and a second arm defines a passage formed near a free end thereof, wherein the tube is extendable across the pair of arms when the tube is operatively associated with the cartridge.
The lumen formed near the free end of the first arm may be configured and dimensioned to slidably engage the tube when the tube is positioned therein. The passage formed near the free end of the second arm may be configured and dimensioned to fixedly engage the tube when the tube is positioned therein.
The peristaltic cooling pump system may further include a plurality of dividing walls spaced along a length of the rollers. The dividing walls define pumping regions therebetween. A plurality of cartridges may be provided for operative engagement, one each, into a respective pumping region. Each pumping region may be sized to accommodate a different sized tube. Accordingly, each cartridge may have an occlusion surface having a different diameter.
The actuation housing may be configured to support a plurality of cartridges thereon. Each cartridge may accommodate a tube having a different cross-sectional dimension.
The peristaltic cooling pump system may further include a fluid reservoir management system containing a quantity of fluid therein. The fluid reservoir management system is fluidly connected to an inlet and an outlet of the tube. The fluid reservoir management system may include a first reservoir fluidly connectable to an inlet of the tube; a second reservoir fluidly connectable to an outlet of the tube; and a diaphragm separating the first and second reservoirs. In use, prior to the operation of the peristaltic cooling pump system the first reservoir may contain all of the fluid and the second reservoir contains no fluid. Further, during operation of the peristaltic cooling pump system the fluid may travel from the first reservoir, through the tube, to the second reservoir. The diaphragm may be configured to move to contract the first reservoir and expand the second reservoir as fluid is flowing therebetween.
The presently disclosed sterilizable pumps and systems, together with attendant advantages, are best understood by reference to the following detailed description in conjunction with the figures.
Referring again to
RF generator 107 supplies RF power to electrode shaft 104, as shown by the RF power connection “P”. At the same time, electrode shaft 104 which includes a temperature sensor (not shown), feeds temperature information back to RF generator 107 and/or a controller circuit 109 relating to a temperature reading To or multiple temperature readings of the tissue coolant fluid or tip arrangement. According to the temperature reading, any modulation of the RF output power “P” is accorded by controller 109. More particularly, controller 109 modulates the RF voltage, current, and/or power level to stabilize the ablation volume or process. If temperature reading To rises to a boiling point, the power is either shut off or severely cut back to generator 107 by controller 109. Thus a feedback loop between power and temperature (or any other set of parameters associated with the lesion process) can be implemented to monitor the overall process.
In addition, as seen in
With continued reference to
Control system 100 may also include a reservoir of coolant fluid 110 which may have possible interior temperature regulation within the fluid bath. Bath temperatures and control signals are fed back and forth to controller system 109. These parameters also could be integrated in the overall control of the ablation process. Indwelling controllers, electronics, microprocessors, or software may be included to govern the entire process or allow preplanned parameters to be configured by the operator based on the selection of a tip geometry and overall ablation volume which are typically selected according to a tumor or pathological volume to be destroyed. Many variants or interconnections of the block diagram shown in
Turning now to
As seen in
Cartridge 300 functions to hold tube “T” in position during connection with the remainder of peristaltic pump system 200, such that a user does not have to hold tube “T”.
Turning now to
As seen in
While only two rollers 222 are shown in
As seen in
As seen in
With continued reference to
As seen in
With reference now to
Adjustment of the rate of fluid flow through tube “T” is accomplished by further rotation of engagement mechanism 240 about the rotational axis “X”, in the direction of arrow “A”. The greater the degree of rotation of engagement mechanism 240 about the rotational axis “X”, the more actuation housing 202 is approximated toward rollers 222 of rotor assembly 220 and the greater the degree of compression of tube “T” by rollers 222 of rotor assembly 220 against occlusion surface 334 of frame 330. In operation, the greater the degree of compression of tube “T” between rollers 222 of rotor assembly 220 against occlusion surface 334 of frame 330 the greater the rate of fluid flow through tube “T”.
In operation, when fluid “F” is pumped through tube “T”, fluid “F” is pumped to the operative site (i.e., to electrode shaft 104) to thereby maintain the operative site at a substantially constant temperature during the surgical procedure. Engagement mechanism 240 may be provided with tactile feedback structure (not shown), which provides the user with sensory feedback during the rotation of engagement mechanism 240 about the rotational “X” axis.
Turning now to
Chambers or reservoirs 412, 422 are fluidly separated from one another. Bladders 410, 420 may be fabricated from any material known by one having skill in the art, including and not limited to pliable, flexible and/or elastomeric materials; rigid, non-flexible materials or any combinations thereof.
A first end of tube “T” is connectable to nozzle 414 of first reservoir 412, through valve 430 a, while a second end of tube “T is connectable to second reservoir 422, through valve 430 b. Prior to operation or use of fluid reservoir management system 200 first reservoir 412 of first bladder 410 is filled with a fluid, such as distilled or sterile water, while second reservoir 422 of second bladder 420 is empty. In use, as pump system 200 is in operation, fluid “Fout” is drawn out of first reservoir 412 and communicated through tube “T” passing through pump system 200, and fluid “Fin” is deposited into second reservoir 422. Pump system 200 also delivers fluid to the target surgical site before returning the fluid to the second reservoir 422.
Effectively, fluid management reservoir 400 is a single use-type reservoir. Once the initial fluid contained within first reservoir 412 is completely used and deposited within second reservoir 422, fluid management reservoir 400 is replaced with a new fluid management reservoir.
Fluid management reservoir 400 includes a diaphragm 450 separating first reservoir 410 from second reservoir 420. In operation, as fluid flows from first reservoir 412 to second reservoir 422, thereby emptying first reservoir 412 and filling second reservoir 422, diaphragm 450 moves from second reservoir 422 toward first reservoir 412 thereby constricting first reservoir 412 and expanding second reservoir 422.
Turning now to
As seen in
While only three rollers 522 are shown in
As seen in
As seen in
Each cartridge 530 is configured and adapted for engagement in any of pumping regions 528. In particular, each cartridge 530 includes a locking element 536 b (see
In operation, when tube “T” is positioned in a pumping region 528 and a respective cartridge 530 is moved to a close cooperative arrangement with rollers 522, fluid may be pumped through tube “T” and to the operative site (i.e., to electrode shaft 104) to thereby maintain the operative site at a substantially constant temperature during the surgical procedure.
In accordance with the present embodiment, a plurality of tubes “T” may be placed in respective pumping regions 528 and respective cartridges 530 may be used to operatively engage tubes “T” and create a pumping action through the tubes “T” as the rotor assembly 520 is rotated. In this manner, a plurality of different cooling paths or circuits are defined, more particularly, a plurality of discrete fluid paths are defined. In other words, the fluid from one cooling path does not mix with the fluid from another fluid path.
Tubes “T” of varying diameters may be placed into various pumping regions 528 in order to pump varying volumes of fluid at varying rates. Dividing walls 526 may be spaced by varying amounts in order to define pumping region 528 of varying sizes which in turn can accommodate tubes “T” of various sizes. Accordingly, it is envisioned that cartridges 530 must be provided in varying sizes to cooperate and complement the sizes of the pumping regions 528.
Additionally, occlusion surface 534 of cartridge 530 may have a relatively larger or smaller diameter depending on the size of tube “T” which is being used. For example, if a relatively larger diameter tube “T” is being used, a cartridge 530 having an occlusion surface 534 with a relatively larger diameter will be used. Likewise, if a relatively smaller diameter tube “T” is being used, a cartridge 530 having an occlusion surface 534 with a relatively smaller diameter will be used.
Cartridges 530 may be provided with tactile feedback structure (not shown) which provides the user with sensory feedback during the connection and/or placement of cartridges 530 into pumping regions 528.
As seen in
Although illustrative embodiments of the present disclosure are described herein, the disclosure is not limited to those embodiments, and various other changes and modifications may be affected therein by one skilled in the art without departing from the scope or spirit of the disclosure. All such changes and modifications are intended to be included within the scope of the present disclosure.
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US7699842||Aug 29, 2008||Apr 20, 2010||Covidien Ag||Electrosurgical system employing multiple electrodes and method thereof|
|US8052403 *||Aug 9, 2007||Nov 8, 2011||Becher James J||Peristaltic pump|
|US8062290||Mar 29, 2010||Nov 22, 2011||Covidien Ag||Electrosurgical system employing multiple electrodes|
|US8181995||Sep 7, 2007||May 22, 2012||Tyco Healthcare Group Lp||Cool tip junction|
|US8182477||Sep 26, 2007||May 22, 2012||Covidien Ag||Electrosurgical system employing multiple electrodes and method thereof|
|US8272857 *||Sep 25, 2012||Medtronic Xomed, Inc.||Method and system for loading of tubing into a pumping device|
|US8292880||Nov 25, 2008||Oct 23, 2012||Vivant Medical, Inc.||Targeted cooling of deployable microwave antenna|
|US8398626||Nov 17, 2011||Mar 19, 2013||Covidien Ag||Electrosurgical system employing multiple electrodes|
|US8480665||Apr 30, 2012||Jul 9, 2013||Covidien Lp||Cool tip junction|
|US8757991 *||Jun 29, 2009||Jun 24, 2014||Bien-Air Holding S.A.||Peristaltic pump and insertable irrigation line with a tube portion having a determined profile|
|US9113888||May 14, 2012||Aug 25, 2015||Covidien Ag||Electrosurgical system employing multiple electrodes and method thereof|
|US20110165005 *||Jun 29, 2009||Jul 7, 2011||Bien-Air Holding S.A.||Peristaltic pump and irrigation line|
|EP2284397A1 *||Feb 18, 2009||Feb 16, 2011||Medtronic Xomed, Inc.||System for loading of tubing into a pumping device|
|U.S. Classification||417/477.11, 417/477.2|
|International Classification||F04B43/12, F04B43/08|
|Cooperative Classification||A61M2205/12, A61M5/14232, F04B43/1253, A61B2018/00023, F04B43/0072, A61B18/14, F04B43/1292|
|European Classification||F04B43/12G, F04B43/12G10, F04B43/00D8T|
|May 3, 2006||AS||Assignment|
Owner name: SHERWOOD SERVICES AG, SWITZERLAND
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DRAKE, SCOTT;DEBORSKI, CHRISTOPHER A.;MCKELVEY, DONALD;REEL/FRAME:017842/0624;SIGNING DATES FROM 20060106 TO 20060110