Instruction Manual Manuel d instructions Manual de instrucciones Εγχειρίδιο οδηγιών Manual de instruções Rx Only
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1 MIDAS REX MR7 Pneumatic High-Speed System Système pneumatique haute vitesse Sistema neumático de alta velocidad Πνευματικό σύστημα υψηλής ταχύτητας Sistema pneumático de alta velocidade Instruction Manual Manuel d instructions Manual de instrucciones Εγχειρίδιο οδηγιών Manual de instruções Rx Only
2 GLOSSARY EC REP GLOSSARY OF OF Authorized UNIVERSAL UNIVERSAL Representative SYMBOLS SYMBOLS in the Eur Symbols DO Attention: Attention: NOT Dispose See See Instructions Instructions to unsorted for for munic use use The following symbols may appear within this manual, on product labeling, or on the! product USA Rx itself: only! USA For U.S. audience only TOOL Rx only Tool For Control U.S. audience only Caution: Caution: Federal Federal Law Law (USA) (USA) restricts restricts t Attention, see Instructions for Use. Tube Control TUBE Tube Control REF REF Catalog Catalog Number, Number, Reference Reference Numbe Numbe GLOSSARY OF UNIVERSAL United States federal SYMBOLS law restricts this device Air Pressure Relief Rx Only to sale by or on the order of a physician. l Lot Lot Number Number Reference Number Use with I n Serial Serial Number Number w Attention: Lot Number See Instructions for use Multi-Use Disposable Attachment Multi-Use Disposable Attachment Quantity! USA Rx only For U.S. audience only Quantity Serial Number Instrument Case Caution: Federal Law (USA) restricts this device to sale Instrument by or kon Case the order Single Single of a use use physician only; only; do do not not reuse reuse REF Catalog Quantity Number, Reference Number, Reorder Number, Lubricant/Diffuser Part Lubricant/Diffuser = Number Is Is approximately approximately equal equal to to l Lot For Number single patient use only. Do not re-use, Non-sterile Dissecting JTool Non-sterile Dissecting Tool re-process, or re-sterilize this product. Reuse, re-processing Number or re-sterilization may q n Serial Sterilized Sterilized by by gamma gamma irradiation irradiation compromise the structural integrity of the Quantity device and/or create a risk of contamination f Use Use by by date date of the device, which could result in patient k Single injury, use illness, only; or death do not reuse m Date Date of of Manufacture Manufacture Approximately equal to Attachment Attachment = Is approximately equal to Storage Storage Temperatures Temperatures Non-Sterile Control Unit Control Unit J Non-sterile Unlock Unlock Sterilized by Gamma Irradiation Refurbished q Sterilized by gamma irradiation Refurbished Lock Lock f Use by date Use by date Accessory On On Accessory m Date Date of of Manufacture manufacture Regulator Off Off Regulator Storage Temperature Temperatures Limitations Bone Mill Finger-Operated Finger-Operated Bone Mill Control Control Unlock Motor Foot-Operated Foot-Operated Motor Control Control Lock Conformité Européene (European Lock Brush Conformité BrushEuropéene (European C This This symbol symbol means means that that the the device device f On MDD 93/42/EEC. On MDD 93/42/EEC. Adapter Adapter Off EC REP EC REP Authorized Representative in the Eu Off Authorized USA Representative Only in the Eu Finger-Operated Control Manufacturer Manufacturer Finger-Operated Control Do not dispose to Foot-Operated Control DO NOT unsorted Dispose municipal DO NOT Dispose to to unsorted unsorted mun mun waste. Conformité Foot-Operated Européene Control (European Conformity) TOOL Tool Control TOOL Tool Control Tool Control This symbol means that the device fully complies with European Council Directive MDD Compliant 93/42/EEC. with European Council Directive TUBE TUBE Tube Tube Control Control Manufacturer EC REP MDD 93/42/EEC. Authorized Authorized Representative Representative in the in the European European Community Consult Community Manufacturer Instructions for Use DO NOT Dispose to unsorted municipal waste w Manufacturer
3 MIDAS REX MR7 Contents Symbols...2 General Information...5 Indications for Use...5 Contraindications...5 Special Notices...5 General Safety Precautions...6 No Latex Policy...6 System Components...7 Non-Disposable Components...7 Disposable Components Legend Dissecting Tools General Guidelines For Attachment and Tool Applications Setting up the Operating Room Power Source Requirements Pneumatic Connections Setting up the MR7 System Installing the Lubricant/Diffuser Cartridge Connecting the Motor Installing an Attachment and Tool Straight Attachments Specialized Attachments Activating the Motor Disassembling the MR7 System Depressurize the System Disconnect Hoses Discard the Lubricant/Diffuser Cartridge Remove the Attachment and Tool Cleaning & Sterilizing the MR7 System MR7 Motor Pneumatic Control Unit / N2 DISS Pressure Hose / Triton Adapter
4 Attachments / Tubes Transmissible Spongiform Encaphalopathies (TSE) Return Policy Troubleshooting Refurbishing or Repairs Preventative Maintenance Limited Warranty Appendix A Specialized Attachments Angled Attachments Variable Exposure Attachments Footed Attachments Rotating Footed Attachments Contra-Angle Attachments (16-MF) Metal Cutting Attachments Telescoping Attachments Perforator Driver Attachments Jacobs Chuck Attachments MIDAS REX MR7
5 General Information Read and understand this manual before use of the MR7 System. The Midas Rex MR7 system is designed for use by medical professionals familiar with powered surgical instrumentation. The surgeon is responsible for learning the proper techniques in the use of this system, as inappropriate use may potentially be harmful. It is strongly recommended that the surgeon and dedicated operating room personnel are knowledgeable with the use of this equipment by being trained in Medtronic Midas Rex Hands-On Workshops or by one of the local authorized representatives. The MR7 system consists of the following components: MR7 or MR7 Touch Motor MR7 Pneumatic Control Unit with Various Connectors MR7 Regulator Hose MR7 Lubricant/Diffuser Cartridge MR7 Triton Adapter (optional) Legend Attachments* Legend Dissecting Tools* *The MR7 system uses the same attachments and dissecting tools as the Legend Pneumatic High-Speed System. Indications for Use The Medtronic Midas Rex MR7 System is a pneumatically operated surgical instrument system. The pneumatic motors provide power to operate removable rotating surgical cutting tools and their accessories intended for use in neurosurgery, including craniotomy and spinal surgery; as well as Ear, Nose and Throat (ENT), orthopedic and general surgical applications including maxillofacial, craniofacial and sternotomy surgeries. Contraindications None Special Notices The words warning, caution and note have special meanings in this manual, and should be carefully reviewed: WARNING A warning indicates that the personal safety of the patient or physician may be involved. Disregarding this information could result in injury to the patient or physician. CAUTION A caution indicates that there is a risk of damaging equipment. NOTE A note is intended to provide additional information, which may be useful, but is not essential to complete the procedure. MIDAS REX MR7 5
6 General Safety Precautions WARNING Do not use the Midas Rex MR7 System before proper cleaning and sterilization. Do not operate the Midas Rex MR7 System in the presence of Magnetic Resonance Imaging devices. Do not use damaged, faulty, or modified Midas Rex MR7 System components. Inspect the Midas Rex MR7 System for damage prior to each use: Check the motor s exhaust hose for cracks or tears. Visually inspect attachments and tools. Do not use bent or damaged tools. Install attachment and dissecting tool, then briefly run motor. * Check motor for overheating and leaking lubricant. * Check attachment for overheating. * Check dissecting tool for flail. Do not operate the Midas Rex MR7 System without eye protection. Motors and attachments which fail due to extended use may allow a component to detach and fall from the motor or attachment, and may cause patient injury. Heavy side loads and/or long operating periods may cause the device to overheat. If overheating occurs: Never place an overheated motor on the patient or draping during surgery. Discontinue use and rest the motor by using intermittently, or wrap the motor/attachment interface with a moist sterile towel. If the motor is passed off, the receiver should grasp the motor by the proximal end close to the motor hose. To avoid injury to the patient or user, do not place the handpiece on the patient or in an unsecured location, when not in use. Midas Rex MR7 motors should only be operated when the attachment is in the position. If a dissecting tool package is opened, but the tool is not used or contaminated, the tool can be re-sterilized by steam sterilization. Remove tool from all original packaging and place into an approved autoclave package. Steam sterilize as follows: High Vacuum Steam: 270 F (132 C) for 5 minutes Gravity Displacement: 270 F (132 C) for 15 minutes The re-sterilized tool must be used promptly following re-sterilization. If rust or corrosion is encountered after re-sterilization, do not use the re-sterilized tool. No Latex Policy Legend and MR7 products, packaging materials, labels, package inserts, and similar items manufactured by and/or for MPSS do not contain latex. 6 MIDAS REX MR7
7 Non-Disposable Components System Components MR7 Motor The MR7 motor is a high-speed, high-torque motor used to dissect bone and biomaterials Collet Motor Case Swivel Hose Finger Control Lever Safety Slide (MR7 Touch Only) Figure 1: Motor Components In addition to the components listed in Figure 1, each MR7 motor has a lubricant/diffuser housing at the end of the motor hose, as seen in Figure 2. Figure 2: Lubricant/Diffuser Housing MIDAS REX MR7 7
8 WARNING Use only Medtronic Midas Rex Legend or MR7 devices with an MR7 motor. Use of other devices may cause injury or damage equipment, and will void the manufacturer s warranty. Pneumatic Control Unit The pneumatic control unit (Figure 3) provides variable speed motor control controls through a foot pedal. It also allows the user to switch between finger and foot control of the motor (if applicable). Regulator The regulator (Figure 4) controls the delivery pressure of compressed gas to the pneumatic control unit. The pressure gauges monitor cylinder pressure (right gauge) and delivery pressure (left gauge). Figure 3: Pneumatic Control Unit Instrument Case The instrument case (Figure 5) is used to organize equipment. Regulator Hose (N2 DISS Pressure Hose) Connects from the gas source to the pneumatic control unit to deliver compressed gas. Figure 4: Regulator Figure 5: Instrument Case 8 MIDAS REX MR7
9 N2 DISS to Male Schrader Adapter The N2 DISS to male Schrader adapter (Figure 6) allows for the regulator hose to be attached to a female Schrader in-house gas connection. A N2 DISS to female Schrader adapter is also available for connection of the regulator hose to a male Schrader in-house gas connection. N2 DISS to Air DISS Adapter The N2 DISS to air DISS adapter (Figure 7) allows for the regulator hose to be attached to an Air DISS in-house gas connection. Figure 6: N2 DISS to Male Schrader Adapter N2 DISS to WF4 Adapter The N2 DISS to WF4 adapter (Figure 8) allows for the regulator hose to be attached to a Midas Rex safety valve regulator previously used for Midas Rex Classic or Midas Rex III motors. The in-line oiler must be removed from the safety valve regulator. Attachment Cleaning Nozzle The attachment cleaning nozzle (Figure 9) allows for recommended aerosol spray cleaner to be used in cleaning procedures. Motor Wrench The motor wrench (Figure 10) is used to align arrows on motor collet flats prior to installation of a Legend attachment. Triton Adapter The Triton adapter (Figure 11) allows the Triton handpiece to be driven by the MR7 pneumatic control unit. It functions much the same way as the Triton port on the Legend pneumatic control unit, except that it is connected between the control unit and the gas source, rather than being integrated into the control unit Figure 7: N2 DISS to Air DISS Adapter Figure 8: N2 DISS to WF4 Adapter Figure 9: Attachment Cleaning Nozzle Figure 10: Motor Wrench Figure 11: Triton Adapter MIDAS REX MR7 9
10 Legend Attachments Legend motor attachments are available in various designs to facilitate a variety of surgical procedures. Attachments vary in length, diameter, and overall design. They are marked and color-coded to correspond with their associated dissecting tools. A few of the Legend attachments available are listed in the table below. Attachment Example Other Details/Options Standard Straight Attachments AS09 Standard Angled Attachments AA14 Straight Variable Exposure Attachments AVS07 Angled Variable Exposure Attachments AVA07 Fixed Footed Attachments AF01. Rotating Footed Attachments AF01R Telescoping Attachments AT10 (base) TT12A (tube) The telescoping attachment requires the use of the AT10 attachment base, as well as a telescoping tube. Tubes are available in straight, curved, or hooded form. Contra-Angle Attachment AC16 Metal Cutting Attachment ASMC Perforator Attachment AD01 Available in 800 RPM or 1000 RPM form. 5/32 Jacobs Chuck Attachment AD02 Bone Mill Attachment BM100 NOTE Angled and straight attachments with the same length, marking, and color band share the same dissecting tool. Curved and straight telescoping tubes with the same length, marking, and color band also share the same dissecting tool. Example: The 14- AM straight and 14-AM angled attachments are 14 cm long, marked 14-AM and have a green color band. All dissecting tools with the prefix 14 (14MH30) may be used in either the 14-AM straight or 14-AM angled attachment. Be sure to match the color code and nomenclature on the Legend Dissecting Tool packaging with the color band and nomenclature on the Legend Attachment. 10 MIDAS REX MR7
11 Disposable Components WARNING Use only Medtronic Midas Rex Legend or MR7 devices with an MR7 motor. Use of other devices may cause injury or damage equipment, and will void the manufacturer s warranty. Lubricant/Diffuser Cartridge The lubricant/diffuser cartridge (Figure 12) provides lubrication to the motor and filters oil from exhausted air. Telescoping Tubes Telescoping tubes (Figure 13) provide support to the rotating dissecting tool. Telescoping tubes are disposable following multiple uses and should be discarded when heat or excessive vibration is noticed or insertion of tools becomes difficult. Figure 12: Lubricant/Diffuser Cartridge Cleaning Brushes Cleaning brushes (Figure 14) are used to clean debris from lumen of attachments and telescoping tubes. Sized for an internal bore diameter of 3.2 mm, 2.4 mm or 1.2 mm in Legend Attachments and Telescoping Tubes. NOTE Cleaning brushes will not pass through angled, contraangle, metal cutting, perforator, or Jacobs Chuck attachments, because they are not cannulated. Figure 13: Telescoping Tube 3.2mm 2.4mm 1.2mm Figure 14: Cleaning Brushes MIDAS REX MR7 11
12 Legend Dissecting Tools Legend dissecting tools are sterile cutting tools, intended for cutting bone and biomaterials. Dissecting Tool Nomenclature Part numbers for Legend dissecting tools follow a standard naming convention, which is described in the diagram below. A basic part number consists of the associated attachment length, the tool head shape, and the tool head diameter. Part numbers may also include a variety of prefixes to identify specific attachment types, as well as a variety of suffixes to provide additional information about the dissecting tool. Tools that use a design taken from the Mednext line are designated by an additional -MN suffix. Associated Attachment Length Tool Head Diameter (x.x millimeters) Optional Prefix Tool Head Shape Optional Suffix Tool Number Prefixes (not all inclusive) F... MC T For use with footed attachments For use with metal cutting attachments For use with telescoping attachments Tool Head Shapes (not all inclusive) AC Acorn MH Match Head BA Ball OV Oval CY Cylinder RT Reverse Taper HM Hole Maker TA Tapered HS Hole Saw TD Twist Drill Tool Number Suffixes (note that more than one of the suffixes listed may be combined in a single part number) L Long S Spiral D Diamond SH Short X Extra DC Diamond Coarse F Fine DX Diamond Extra Coarse C Carbide MN Mednext Tool Design 12 MIDAS REX MR7
13 WARNING Dissecting tools are for single-use only. Do not attempt to sterilize them. The dissecting tools are packed sterile and are not intended for repeat use. To prevent contamination, use only once. Do not use an attachment and dissecting tool combination that results in tool flail or excessive vibration. Do not attempt to remove a tool while the motor is running. Do not attempt to remove a tool from an overheated motor or attachment. Do not use the device if the package is opened or damaged. General Guidelines For Attachment and Tool Applications These are general guidelines for dissecting tool applications and are not an all-inclusive listing. WARNING Be sure to match the color code and nomenclature on the Legend Dissecting Tool packaging with the color band and nomenclature on the Legend Attachment. Failure to do so could result in injury to the patient or operating room staff. Surgical Application Commonly Used Attachments Commonly Used Dissecting Tools Suggested Motor(s) Spine 8-B, 9-M, 14-AM, 15-A Match Head Elongated spherical design allows controlled, delicate dissection. For entry hole, nerve decompression, osteophyte removal, sinus dissection, etc. MR7, MR7 Touch Ball Helical cutting flutes dissect bone or cement effectively from a wide variety of approach angles. For debridement, decortication, sinus dissection, etc. Oval Helical cutting flutes and curved design blend acorn and ball styles to vary dissection efficiency with approach angle. For decortication, laminotomy, entry hole, nerve decompression, osteophyte removal, etc. Hole Maker/Saw Matched sets of Hole Makers and Hole Saws are efficient and effective for interbody fusion. Cylinder Effective bone sculpting and planing. For graft shaping, debridement, corpectomy, decortication, interbody fusion, fusion takedown, etc. Acorn Curved design varies dissection efficiency with varied approach angles. For entry hole, laminotomy, bone shaping, debridement, corpectomy, decortication, fusion takedown, etc. Telescoping Match Head Elongated spherical design allows controlled, delicate dissection. For entry hole, nerve decompression, osteophyte removal, sinus dissection, etc. MR7, MR7 Touch Footed, Straight Tapered Slender design for precise dissection with minimal bone loss. For transection, osteotomy, graft harvesting, bone shaping, entry hole, suture hole, midface advancement, etc. MIDAS REX MR7 13
14 Surgical Application Commonly Used Attachments Commonly Used Dissecting Tools Suggested Motor(s) Neurosurgical Cranial 7-6ST, 8-B, 9-M, 10-9ST, 14-AM, 15-A Match Head Elongated spherical design allows controlled, delicate dissection. For entry hole, nerve decompression, osteophyte removal, sinus dissection, etc. MR7 Ball Helical cutting flutes dissect bone or cement effectively from a wide variety of approach angles. For debridement, decortication, sinus dissection, etc. Twist Drill Helical design with stop produces a hole with a precise depth. Ideal for plating. Acorn Curved design varies dissection efficiency with varied approach angles. For entry hole, laminotomy, bone shaping, debridement, corpectomy, decortication, fusion takedown, etc. Telescoping Match Head Elongated spherical design allows controlled, delicate dissection. For entry hole, nerve decompression, osteophyte removal, sinus dissection, etc. Footed Tapered Slender design for precise dissection with minimal bone loss. For transection, osteotomy, graft harvesting, bone shaping, entry hole, suture hole, midface advancement, etc. General Surgery and Plastic Surgery (Craniofacial/ Maxillofacial/Sternotomy) 7-6ST, 8-B, 9-M, 10-9ST, 14-AM Match Head Elongated spherical design allows controlled, delicate dissection. For entry hole, nerve decompression, osteophyte removal, sinus dissection, etc. MR7, MR7 Touch Ball Helical cutting flutes dissect bone or cement effectively from a wide variety of approach angles. For debridement, decortication, sinus dissection, etc. Tapered Slender design for precise dissection with minimal bone loss. For transection, osteotomy, graft harvesting, bone shaping, entry hole, suture hole, midface advancement, etc. Ear, Nose, and Throat (Otology, Neurootology) 7-6ST, 10-9ST Twist Drill Helical design with stop produces a hole with a precise depth. Ideal for plating. Ball MR7 Helical cutting flutes dissect bone or cement effectively from a wide variety of approach angles. For debridement, decortication, sinus dissection, etc. 14 MIDAS REX MR7
15 Surgical Application Commonly Used Attachments Orthopaedics 8-B, 9-M, 14- AM, 21-TU, 26-R, Footed, Telescoping Ball Commonly Used Dissecting Tools Helical cutting flutes dissect bone or cement effectively from a wide variety of approach angles. For debridement, decortication, sinus dissection, etc. Suggested Motor(s) MR7, MR7 Touch Tapered Slender design for precise dissection with minimal bone loss. For transection, osteotomy, graft harvesting, bone shaping, entry hole, suture hole, midface advancement, etc. Acorn Curved design varies dissection efficiency with varied approach angles. For entry hole, laminotomy, bone shaping, debridement, corpectomy, decortication, fusion takedown, etc. Cylinder Effective bone sculpting and planing. For graft shaping, debridement, corpectomy, decortication, interbody fusion, fusion takedown, etc. Footed Tapered Slender design for precise dissection with minimal bone loss. For transection, osteotomy, graft harvesting, bone shaping, entry hole, suture hole, midface advancement, etc. Biometals/Bioceramics/ Biomaterials MC Metal Cutter Cutting flutes or diamond wheel design remove metals, ceramics and other biomaterials effectively from a variety of approach angles. For cutting rods, pins, plates, implants, screws, etc. MR7, MR7 Touch MIDAS REX MR7 15
16 Power Source Requirements Required Operating (Dynamic) Pressure Setting up the Operating Room Nominal Operating (Dynamic) Pressure Approximate Flow Rate Required Gas Type psi 100 psi 12 cubic feet/min. Nitrogen or Dry-Filtered bar 6.9 bar 340 liters/min. Compressed Air CAUTION Do not run the motor at an operating pressure above or below the required operating pressure range. Operating pressure below 80 psi (5.5 bar) may not provide proper lubrication to the motor. Operating pressure above 120 psi (8.3 bar) may damage or reduce the life of the motor. Pneumatic Connections In-House Compressed Gas Regulator Hose N2 DISS to Male Schrader Adapter Gas Source N2 DISS to Air DISS Adapter Gas Source Gas Source (Pressure regulated with N2 DISS connection) Cylinder Compressed Gas Figure 15: In-House Gas Connection Options Regulator Hose DISS/WF4 Adapter Regulator Figure 16: Cylinder Gas Connection CAUTION If you are using the Midas Rex Safety Valve Regulator instead of the Legend Regulator, you must replace the in-line oiler with the DISS/WF4 adapter before use. 16 MIDAS REX MR7
17 Installing the Oiler Cartridge Setting up the MR7 System WARNING Do not use the MR7 system with the Midas Rex in-line oiler. The MR7 motor is sufficiently lubricated by the lubricant/diffuser on the motor hose, and will be overlubricated if the Midas Rex in-line oiler is used Set the non-running (static) pressure to psi ( bar) at the gas source. Operating (dynamic) pressure may be adjusted later. Hold the lubricant/diffuser cartridge perpendicular to the housing (Figure 17), and press the cartridge s circular fitting onto the housing s circular receptacle (Figure 18), breaking the foil seal. Rotate the cartridge down until it clicks into place. 4. Verify that the symbol on the cartridge is lined up with the notch on the housing (Figure 19). Figure 17: Aligning the Lubricant/Diffuser Cartridge with the Housing WARNING Failure to properly secure the lubricant/diffuser cartridge may cause injury to operator and/or operating room staff. Do not attempt to remove the lubricant/diffuser cartridge while the system is pressurized. CAUTION Do not use an MR7 motor without a lubricant/diffuser installed. Do not use a lubricant/diffuser cartridge for more than one hour of drill time. Do not re-use a lubricant/diffuser cartridge. It is a singleuse product. Do not attempt to refill a used lubricant/diffuser cartridge. Do not use a lubricant/diffuser cartridge if it appears to be damaged, or if the inner foil seal is punctured. Figure 18: Pressing the Cartridge onto the Housing Figure 19: Correctly Installed Lubricant/Diffuser Cartridge MIDAS REX MR7 17
18 Connecting the Motor 1. Connect the motor hose to the motor port on the top of the pneumatic control unit, by swinging the port cover to the side and pressing the end of the hose into the port (Figure 20). WARNING Do not pinch, kink, obstruct, cut, tear, or step on the motor/exhaust hose. This may cause the hose to burst, potentially injuring the patient or user. NOTE If using the MR7 Touch motor, slide the control slide on the pneumatic control unit to the position (Figure 21). This will automatically depress and lock the foot pedal. The control will not lock into the position unless the motor hose is connected into the motor port. When the motor hose is removed from the motor port, the foot pedal will return to normal position. If using the Triton Power Surgical Instrumentation System in conjunction with the MR7 motor, use the optional Triton adapter to connect the Triton hose. Refer to the documentation accompanying the adapter for connection instructions. The motor s exhaust hose may have an oily film on the external surface from pressure and/or temperature differentials following sterilization. Wipe the exhaust hose with a sterile cloth prior to use. If motor continues to have oil on the exhaust hose, return the motor to MPSS for refurbishing. Figure 20: Connecting the Motor Hose to the Motor Port WARNING To avoid injury to the patient or user, do not use the pneumatic control unit to operate systems other than the MR7, Legend, and Triton systems. Prior to installation of a Legend attachment and dissecting tool, ensure that the arrows on the motor collet flats are aligned (Figure 22). If the arrows are not aligned, use the motor wrench to turn the collet flat closest to the motor case until its arrow is aligned with the arrow on the other collet flat. WARNING To avoid injury when using the MR7 Touch motor, ensure the safety slide is in the O position before installing the attachment and tool. Figure 21: Finger/Foot Control Slide Figure 22: Aligning the collet flats 18 MIDAS REX MR7
19 WARNING Installing an Attachment and Tool Dissecting tool flutes are sharp and may perforate surgical gloves. Tools may be grasped with a hemostat to aid in installation and removal. Straight Attachments Installation: 1. Slide the attachment over the motor collet, aligning the triangular markers (Figure 23). You will feel and hear the attachment click into place when it is fully seated. 2. Insert the dissecting tool into the attachment with a slight rotational motion (Figure 24). You will feel and hear the tool click into place when it is fully seated in the attachment. 3. Turn the attachment to the position on the motor case (Figure 25). Gently pull on the shaft of the dissecting tool to verify proper installation. Figure 23: Sliding the Attachment over the Motor Collet Removal: Removal is the reverse of installation. Specialized Attachments See Appendix A Specialized Attachments for installation and removal instructions for other attachments. Figure 24: Inserting the Dissecting Tool into the Attachment Figure 25: Attachment in the Locked Position MIDAS REX MR7 19
20 NOTE Activating the Motor In order to activate the MR7 Touch motor, the safety slide on the finger control switch must be in the position, and the control slide on the foot control must be in the position. The control slide will not lock in the position unless a motor is connected to the motor port Activate the motor by pressing on the foot control pedal (Figure 26), or by pressing on the finger control lever (MR7 Touch motor only). Adjust operating pressure as needed at the compressed gas source until supply pressure gauge on pneumatic control unit reads within a range of psi ( bar) as required. Operating pressure (with motor running) will decrease slightly from the non-running (static) pressure setting when the motor is activated. Foot Control Pedal Air Pressure Gauge Control Slide Figure 26: Foot Control Pedal Finger Control Lever Figure 27: MR7 Finger Control Switch WARNING Do not use excessive force to pry or push bone with the attachment or tool during dissection. This could cause the tool to break and cause injury to the patient or operating room staff. Use adequate irrigation during dissection, to prevent thermal necrosis. MR7 motors should only be operated when the attachment is in the position. NOTE To decrease pressure, turn down the in-house compressed gas source or loosen the pressure handle on the regulator. Push down on the pressure relief at the pneumatic control unit to exhaust excess pressure in the hoses. Then re-adjust pressure as needed. 20 MIDAS REX MR7
21 Disassembling the MR7 System Depressurize the System 1. Turn off the compressed gas at the source. 2. Press the pressure relief button on the pneumatic control unit, to release remaining gas. WARNING Do not disassemble equipment before the gas is released from control unit. Disconnect Hoses Release the motor hose from the control unit, by holding the hose firmly and pressing the motor port connection button. Motor Port Connection Button Pressure Relief Button Figure 28: Motor Port Connection and Pressure Relief Buttons Discard the Lubricant/Diffuser Cartridge Remove the lubricant/diffuser cartridge from the housing and discard it. CAUTION Do not re-use a lubricant/diffuser cartridge. It is a single-use product. Remove the Attachment and Tool 1. Follow the applicable removal instructions in the Installing an Attachment and Tool section of this manual to remove the attachment and tool from the motor. WARNING Dissecting tool flutes are sharp and may perforate surgical gloves. Tools may be grasped with a hemostat to aid in installation and removal. 2. Discard used dissecting tools in an appropriate container. MIDAS REX MR7 21
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