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Infiltration pump having insulated rollers and programmable foot pedalRelated Patent Categories: Pumps, Condition Responsive Control Of Pump Drive Motor, By Control Of Electric Or Magnetic Drive MotorInfiltration pump having insulated rollers and programmable foot pedal description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070110588, Infiltration pump having insulated rollers and programmable foot pedal. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS-REFERENCE TO RELATED APPLICATIONS [0001] Not Applicable STATEMENT RE: FEDERALLY SPONSORED RESEARCH/DEVELOPMENT [0002] Not Applicable BACKGROUND OF THE INVENTION [0003] The present invention relates in general to an improved tumescent anesthesia apparatus and, more particularly, to a tumescent anesthesia infiltration pump including insulated rollers and a foot pedal with a programmable response. [0004] Liposuction is an invasive surgical procedure for removing subcutaneous fat cells by inserting one end of a liposuction cannula into an area of interest of a patient, and attaching the other end of the cannula to a suction device. [0005] It is common that when the fat cells are removed from the patient, blood is inevitably withdrawn. When the amount of the removed fat cells is low, withdrawal of blood is not critical. However, if the removal of a large volume of fat cells is required, complications result and recuperation time is extended and in almost all situations, supplemental blood is added to the patient, thus posing other danger. [0006] To increase safety of the procedure, the Applicant of the present invention, Dr. Jeffrey Klein first introduced the use of the tumescent technique for local anesthesia (Klein, J A, The tumescent technique for liposuction surgery, J Am Acad Comestic Surg 4:263-267, 1987). The tumescent technique involves the infiltration of a solution of extremely dilute lidocaine, epinephrine, and sodium bicarbonate into the subcutaneous fat. Infusion is made through the use of a peristaltic infiltration pump, and the tumescent solution reduces bleeding and also eliminates the need for general anesthetics. [0007] Currently, the peristaltic pump used in the tumescent anesthesia apparatus includes an electric motor and a headstock driven by the electric motor. The headstock allows the tube connecting the cannula extending there through and controls the flow direction of the fluid in the tube. The headstock is made of metal material, such that it is electrically conducted to the live circuitry of the electric motor. Therefore, during the liposuction operation, if the tube extending through the headstock has a breech, or when a leakage occurs to the live circuitry of the electric motor, electric current may be delivered to the patient under operation; and thus causes great danger of the patient. BRIEF SUMMARY OF THE INVENTION [0008] The present invention provides an improved liposuction apparatus, comprising a cannula, a peristaltic pump, a reservoir containing a dilute solution of local anesthetic, a flexible sterile tube connecting the cannula to the reservoir, and a footpad on-off switch. One end of the cannula is in fluid communication with the peristaltic pump via the flexible tube. The peristaltic pump includes a pathway allowing the flexible tubing to extend through and a plurality of non-conductive rollers installed along the pathway to exert force on the flexible tubing. The reservoir is in fluid communication with the cannula via the flexible tubing extending through the peristaltic pump. A flexible non-sterile tube is further included to connect the foot pedal that contains an air bellow therein to the peristaltic pump to control operation by means of a pulse of air pressure. [0009] In the above infiltration apparatus, the foot pedal is operative to switch on the peristaltic pump while being depressed and switch off the peristaltic pump while being released. Therefore, the operator/surgeon can actuate the infiltration of local anesthesia simply by continuously depressing the foot pedal. By simply releasing the foot pedal, the infiltration is stopped. This mode of controlling the infiltration pump is referred to as "momentary" mode. Alternatively, when the infiltration is continued for a longer period of time, the response of the foot pedal can be programmed into another mode referred as the continuous or toggle mode. Under this alternate (continuous) mode, the peristaltic pump is switched on and off in a toggle fashion by alternate depression performed on the foot pedal. That is, in response to each depression performed on the foot pedal, regardless the time the depression lasts, the peristaltic pump is either switched from on to off, or from off to on and remains the off/on status before a next depression event is performed thereon. Once the foot pedal is depressed again, the peristaltic pump is switched to the opposite status and remains on/off before another depression event is performed. [0010] The peristaltic pump further comprises a rotation mechanism driving the non-conductive rollers to rotate clockwise or counterclockwise. As the rollers is made of an electrically non-conductive material, when there is inadvertent fluid leakage from the live circuitry of the peristaltic pump such as when there is breech on the wall of the flexible tubing, electric current is prevented from being delivered to the patient. Therefore, safer pump operation is provided. [0011] In one embodiment of the present invention, the infiltration apparatus comprises a cannula, a flexible tubing connected to the cannula, an infiltration pump comprising a pathway for the flexible tubing to extend through and a plurality of rollers installed along the pathway to exert force on the flexible tubing, a reservoir connected to the flexible tubing extending through the peristaltic pump, and a foot pedal operative to control the on/off status of the infiltration pump in response to depression performed thereon in a plurality of modes. For example, the infiltration pump is switched on when the foot pedal is depressed, and switched off when the foot pedal is released under one of the modes (the momentary mode). In another operational mode (the continuous mode), the infiltration pump is switched and remains on continuously and off continuously by alternate depression performed thereon. [0012] The present invention further provides an infiltration pump comprising a headstock, which comprises a pathway and a plurality of electrically insulated rollers installed along the pathway. The headstock further comprises a rotation mechanism operative to drive the insulated rollers rotating clockwise or counterclockwise, and the infiltration pump further comprises an electric motor operative to drive the rotation mechanism to rotate. [0013] The present invention also provides a plurality of infiltration pump rollers for controlling the direction of a fluid flowing through the infiltration pump, wherein the rollers are made of insulated material. BRIEF DESCRIPTION OF THE DRAWINGS [0014] These, as well as other features of the present invention, will become apparent upon reference to the drawings wherein: [0015] FIG. 1 shows a tumescent liposuction apparatus in use in an operating room; [0016] FIG. 2 shows a cross-sectional view of a headstock of the peristaltic pump of the tumescent liposuction apparatus; [0017] FIG. 3 shows a perspective view of the partially open peristaltic pump; [0018] FIG. 4 shows the infiltration pump insulated rollers of the peristaltic pump; and [0019] FIG. 5 shows the structure of the foot pedal. Continue reading about Infiltration pump having insulated rollers and programmable foot pedal... Full patent description for Infiltration pump having insulated rollers and programmable foot pedal Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Infiltration pump having insulated rollers and programmable foot pedal patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Infiltration pump having insulated rollers and programmable foot pedal or other areas of interest. ### Previous Patent Application: Control unit for compressor Next Patent Application: Integrated bicycle air pump Industry Class: Pumps ### FreshPatents.com Support Thank you for viewing the Infiltration pump having insulated rollers and programmable foot pedal patent info. 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