Transcript
Operating Instructions and Technical Description
CO2 Micromanipulator Micro Point
Martin Micro Point Operating Instructions
0 Table of Contents 0
Table of Contents ...............................................................................2
1
Introduction.........................................................................................4
1.1 1.2 1.3
General Information...............................................................................................4 Lens-Based CO2 Laser Beam Delivery .................................................................4 Micro Point Operating Advantages ......................................................................6
2
Unpacking ...........................................................................................9
2.1 2.2 2.3 2.4
Packaging...............................................................................................................9 Shipment Check & User’s Inspection ................................................................10 Micro Point Microscope Compatibility...............................................................10 CO2 Laser Compatibility ......................................................................................10
3
Installation ........................................................................................11
3.1 3.2 3.3 3.4
Step 1: Inspection ................................................................................................11 Step 2: Attaching the Micro Point to Microscope .............................................13 Step 3: Checking Laser Beam Alignment ..........................................................17 Step 4: Attaching the Micro Point to Laser........................................................21
4
Safety Measures ...............................................................................23
4.1 4.2 4.3 4.4
Warnings and Operational Cautions ..................................................................23 Power Density Versus Spot Size ........................................................................24 Smoke Evacuation ...............................................................................................24 Micro Point Labels ...............................................................................................26
5
Operation ..........................................................................................27
5.1 5.2 5.3 5.4 5.5
Step 1: Setting the Focal Distance .....................................................................27 Step 2: Setting the Treatment Beam Spot Size .................................................28 Step 3: Controlling the Laser Beams .................................................................29 Step 4: Mounting the Hand Rest on Opposite Side ..........................................31 Step 5: Post-Procedure Disassembly ................................................................32
6
Maintenance, Repair, and Warranty ................................................33
6.1 6.2 6.3 6.4 6.5
Maintenance Requirements ................................................................................33 Cleaning the Housing and Telescope ................................................................33 Cleaning the Beam Splitter .................................................................................33 Repairs and Replacements .................................................................................35 Specifications.......................................................................................................36
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6.6 6.7 6.8
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Replacement Parts & Accessories .....................................................................37 Product Liability & Warranty...............................................................................37 Troubleshooting...................................................................................................37
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Martin Micro Point Operating Instructions
1 Introduction 1.1
General Information
Welcome to your Martin Micro Point laser micromanipulator. With the appropriate adapter, your Micro Point couples any CO2 infrared surgical laser to any OR microscope. As a reflective (mirrorbased) rather than transmissive (lens-based) beam delivery device, your Micro Point has important performance, operating and cost advantages compared to other CO2 laser micromanipulators that you may have used previously. To help you derive the maximum benefit from your Micro Point, Section 1 of this manual discusses the key differences between conventional lens-based micromanipulators and the performance you can expect from your Micro Point. Sections 2 through 5, respectively, describe Micro Point unpacking, installation, safety requirements, and operation. Section 6 covers maintenance and repair procedures, your equipment warranty, and Micro Point troubleshooting. Should you have any questions regarding the proper operation and maintenance of your Micro Point, please contact Martin Medizin-Technik or your authorized service representative.
1.2
Lens-Based CO2 Laser Beam Delivery
In contrast to our (mirror-based) Micro Point micromanipulator, conventional systems employ multiple optical lenses to focus the laser light in the focal plane of the OR microscope. Due to the physics of lens-based (i.e. refraction-based) delivery systems, chromatic aberration, beam deflection, shallow depth-of-focus and low transmittance are inescapable limitations. These problems cause large spot sizes and poor aiming and treatment beam spot coincidence on the target tissue. They also impose restrictions on surgical operating procedures and the extent to which various pathologies are amenable to laser treatment.
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Martin Micro Point Operating Instructions Figure 1 (not-to-scale) illustrates the problem of chromatic aberration in lens-based micromanipulators. Due to the different focal distances of the lenses used for the CO2 treatment beam and the (HeNe) aiming beam, it is not possible to achieve spot coincidence on the tissue surface. Rather, the user observes differently sized spot diameters, with the CO2 beam spot being much smaller than the HeNe beam spot, and the areas of the two spots continue to change during the treatment (as the tissue surface is penetrated, or as tissue topography changes).
Optical lens
Aiming beam (HeNe)
Cutting beam (CO2)
Spot sizes on tissue surface
Fig. 1
Lens-based CO2 laser micromanipulator
The uncertainty of treatment beam spot location is compounded by beam alignment errors introduced through the mechanical articulated arm commonly employed with CO2 lasers. These movements cause deflection of both beams from the optical axis of the micromanipulator. As the beams separate and become less coaxial, obtaining acceptable spot coincidence on the tissue is made increasingly difficult. Surgical precision is further hampered by the shallow depth-of-focus that characterizes lens-based delivery systems. If working distance changes or the tissue topography has pronounced irregulari-
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Martin Micro Point Operating Instructions ties, variations in beam spot size and spot coincidence can become significant. Again, the Micro Point’s reflective optics method of laser beam delivery avoids these problems.
1.3
Micro Point Operating Advantages
Exact beam coincidence and small spot size, versatile matching to many OR microscopes, high transmittance and simplicity of use are special Micro Point features that enhance the precision and safety of any laser surgery. Your Micro Point is a color-corrected delivery device that employs patented mirror-based technology for aligning and steering laser beams. Mirror optics are routinely used in the finest astronomical and photographic systems. This design enables laser beams of different wavelengths to be collectively focused at a single point across a wide range of working distances.
Due to the underlying physics of the Micro Point’s reflective beam delivery, uncertainties of treatment beam location vis-à-vis the aiming (or pilot) beam are eliminated. You are assured of continuous spot coincidence on the tissue. You can reliably plan your surgical intervention, because what you see with the HeNe aiming beam is exactly what you get when you fire the CO2 treatment beam.
The Micro Point produces very small spot sizes across the entire 200-mm to 400-mm working distance range – up to 50% smaller in diameter than those obtainable with lens-based micromanipulators. Also important, your Micro Point delivers about 85% of available laser energy to the tissue. This high transmittance permits you to use lasers of lower power to achieve the same surgical effect that only higher-powered, more costly systems now yield. In other words, less laser energy needs to be delivered to the tissue to achieve the same results.
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Martin Micro Point Operating Instructions Figure 1.1 shows how the laser light is focused in the target area by the Micro Point’s mirror system.
Laser input
Secondary mirror Primary mirror
Aiming beam
Cutting beam (CO2)
Beam spot sizes on tissue surface
Fig. 1.1
Micromanipulator with mirror-based beam delivery
If you employ a microscope equipped with multi-observer optics as depicted in Figure 1.2, or make photographic records of procedures, the Micro Point offers another significant advantage compared to conventional CO2 laser micromanipulators. These micromanipulators utilize a reflective opaque spot in the center of the beam splitter to reflect the (HeNe) pilot beam. Although the spot does not interfere with the stereoscopic view of the primary surgeon, other observers – or imaging equipment attached to the microscope’s observation tube – will have their pseudo-stereoscopic view of the tissue partially obstructed by the spot. As a result, the effectiveness of surgical assistance is reduced, and a clear photographic record of the procedure – so often helpful to patients, physicians and insurance companies – cannot be obtained.
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Fig. 1.2
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Operating microscope with multi-observer optics
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2 Unpacking 2.1
Packaging
Your Micro Point comes packaged in a protective double-walled polyethylene carrying case featuring a firm foam insert with cutouts that contain all of the items you need to install and operate your unit. Figure 2 depicts the packing container and the individual items shipped.
1 Micro Point Operating Instructions 2 Zeiss microscope adapter 3 Micromanipulator (housing, mirrors, telescope assembly)
Fig. 2
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4 Articulated arm adapter 5 Adjusting adapter 6 Hex socket keys
Packaging
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Martin Micro Point Operating Instructions
2.2
Shipment Check & User’s Inspection
Check the delivered items against the packing list included to verify proper receipt of goods. If any items are missing, immediately notify your authorized service representative or Martin’s Customer Service Center located at the factory. Inspect all items for any visible damage; if noted, please report the damage to the shipper and to your local service partner or to the Martin Customer Service Center.
Save all packaging materials. They allow the safe storage of your Micro Point and may be needed later to return the unit to the factory for repair.
2.3
Micro Point Microscope Compatibility
The Micro Point is shipped with a standard adapter plate for Zeiss OR microscopes. However, adapters are available for the following OR microscopes on request:
Microscopes Zeiss; OPMI (with/without dovetail plate) Wild Model 680 Siemens Storz Moeller-Wedel Topcon Olympus Weck Table A
2.4
Micro Point adapters for operating microscopes
CO2 Laser Compatibility
The micromanipulator’s scope of delivery includes an adapter (4, Fig. 2) for connecting the Micro Point to Martin’s CO2 lasers (MCO 25 or MCO 50). However, adapters for third-party CO2 lasers are also available on request.
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3 Installation 3.1
Step 1: Inspection
Refer to Figure 3 for identification of your Micro Point parts and sub-assemblies. Step-by-step Micro Point installation procedures are as follows:
Inspect housing and telescope assembly Prior to each surgical procedure, inspect the exterior of the Micro Point for visible damage or foreign material. If damage is noted, notify your authorized Martin service representative or Martin’s Customer Service Center. If cleaning of the housing and/or telescope is necessary, please refer to Section 6.2 for cleaning instructions.
Inspect beam splitter It is extremely important that the mirrored beam splitter surfaces be free of contaminants. The following inspection steps are recommended:
Step (1): Prepare a work area that is clean, lint-free and padded with a soft cloth. Illuminate with a halogen lamp of at least 75 watts.
Step (2): Under illumination, inspect the upper and lower beam splitter surfaces for burn spots and contaminants. Never touch the polished surfaces of the beam splitter.
Step (3): If cleaning is indicated, refer to Section 6.3 for cleaning instructions.
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Martin Micro Point Operating Instructions
1 Laser arm receptacle 2 CO2 laser arm adapter 3 Working distance selector
Fig. 3
12
4 Serial number label 5 Focus/defocus selector & lever 6 “Laser aperture“ label
7 Hand rest 8 Spring clip 9 Joystick assembly
Micro Point micromanipulator components
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3.2
Step 2: Attaching the Micro Point to Microscope
1. Select microscope adapter: If you use a Zeiss microscope, the correct dovetail adapter is already included in the Micro Point set delivered. Just mount this adapter on the bottom of the microscope body, using the screws supplied. If you use a Moeller-Wedel microscope, an intermediate plate (76-401-03) is required, which needs to be installed between the OR microscope and the dovetail plate as depicted in Figures 3.1 and 3.2.
Fig. 3.1
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Bottom side of Moeller-Wedel VM 900 operating microscope with screw threads for adapter plate 76-401-03
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Knurled thumbscrew
Fig. 3.2
2 adapter plates are required for installing the micromanipulator
2. Attach Micro Point to microscope: Mount the Micro Point to the dovetail plate 08-501-00-11 so that its optics are positioned centrically below the microscope’s objective lens. Note:
Fig. 3.3
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Please verify that the thumbscrew with which the Micro Point is secured on the mounting plate is firmly tightened.
Micro Point micromanipulator mounted on Moeller-Wedel VM900 operating microscope
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Fig. 3.4
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Micromanipulator mounted on Zeiss operating microscope (old model)
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Martin Micro Point Operating Instructions
Fig. 3.5
1 Dovetail adapter
3 Objective lens
2 Dovetail mounting plate
4 Thumbscrew
Micromanipulator/Zeiss microscope attachment
Figure 3.5 shows how the Micro Point must be attached to the dovetail plate (2) of a Zeiss microscope. The optics (see arrow) must be aligned centrically to each other. To achieve this, the micromanipulator can be moved axially in the dovetail adapter track.
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3.3
Step 3: Checking Laser Beam Alignment
Before starting the procedure, it is extremely important that you determine the extent to which your laser system’s beams may be misaligned at the distal end of the articulated arm. Excessive misalignment of the beams exiting the laser can cause severe deformation of the beam spots on the tissue, regardless of the beam delivery device used.
1. Select and install laser arm adapter: Refer to Figure 3.6. Depending on the make and model of your CO2 laser, select the appropriate arm adapter shipped with your Micro Point micromanipulator. Install the adapter, proceeding as follows:
Step (1): Make sure power to the laser is off.
Never perform the alignment check with the CO2 laser beam! Always use the pilot laser (aiming beam) for this purpose!
Step (2): Inspect the distal end of the laser’s articulated arm (1) and the laser arm adapter (2); the external threads must be clean and undamaged. Carefully screw the laser arm adapter (2) into the laser arm receptacle (1) and secure finger-tight.
2. Install beam alignment indicator: Screw the threaded male end of the beam alignment indicator (3) supplied with your micromanipulator into the laser arm adapter (2) and secure finger-tight.
Laser arm receptacle
Fig. 3.6
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Laser arm adapter
Beam alignment indicator
Attaching arm adapter and beam alignment indicator to laser
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Martin Micro Point Operating Instructions 3. Check beam alignment: Refer to Figures 3.7 through 3.10. Determine laser beam alignment per the following procedure:
Step (1): Turn on power to the laser system. Use the (visible) aiming beam only! Select the lowest possible power for better identification of the aiming beam on the alignment indicator screen.
Step (2): Verify the presence of a visible beam spot on the flat white indicator screen. Note the position of the spot within the concentric rings of the screen (see Figure 3.7). The location of the beam spot indicates the extent to which your laser is misaligned.
Fig. 3.7
Beam alignment indicator screen
Step (3): Depending on the location of your beam spot on the indicator screen, take the appropriate action as called for in either Figure 3.8, 3.9 or 3.10.
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3-mm ring: Spot location in this area indicates proper alignment of your system’s laser beams. No corrective action is required.
Fig. 3.8
Laser beam alignment: No adjustment required
6-mm ring: Micro Point performance is unaffected by the degree of beam misalignment indicated by any spot located in this ring. However, some realignment of your laser may be necessary to prevent further degradation. Call your authorized laser service representative or the laser manufacturer to arrange preventive maintenance.
Fig. 3.9
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Laser beam alignment: Preventive maintenance recommended
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Outer & 9-mm rings: Spot location in these areas indicates severe beam misalignment. Neither the Micro Point nor any other laser delivery device can operate with a laser showing this degree of misalignment. Call laser manufacturer for technical service and complete beam realignment prior to using laser.
Fig. 3.10
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Laser beam alignment: Consult laser manufacturer
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3.4
Step 4: Attaching the Micro Point to Laser
1. Mount laser arm adapter: Install the laser arm adapter on the articulated arm of your MCO 25/50 laser.
2. Attach Micro Point to laser: Carefully engage the laser articulated arm with the adapter receptacle (3) of the Micro Point and secure arm with half a turn.
To laser source
1 Articulated laser arm
Fig. 3.11
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2 Laser arm adapter
3 Adapter receptacle
Attaching Micro Point to laser arm
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Fig. 3.12
22
Laser arm on Micro Point
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4 Safety Measures 4.1
Warnings and Operational Cautions
WARNING • Protective eyewear (anti-laser goggles) must be worn at all times by all operating personnel in the vicinity of energized lasers. Never look directly into the CO2 or HeNe light sources or the laser aperture when the laser is energized: • Never activate the CO2 laser in the presence of flammable anesthetics – fire/explosion could occur. • The relationship between cutting beam spot size and power density is non-linear: e.g., reducing spot size by one-half quadruples power density. Refer to Table C for power density versus spot size data. • Spot size and laser power are independently controlled. If spot size is decreased with the Micro Point micromanipulator, laser power must also be decreased in order to avoid unintentionally severe burns. After the tissue reaction has been determined, laser power may be increased.
CAUTION • The Micro Point micromanipulator is intended for use solely by physicians trained in the operation of surgical laser systems and microsurgery. • These Operating Instructions presume that operators have referred to their microscope and laser system operating manuals and are thoroughly familiar with the safe and proper utilization of such equipment. Therefore, no restatement of instructions for lasers or microscopes is contained in this manual.
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4.2
Power Density Versus Spot Size
Since spot size and laser power are independently controlled, it is necessary to evaluate the suitability of the laser power setting whenever spot size is changed. Small changes in spot size can produce relatively large changes in power density (defined as laser power per unit area, i.e. power divided by the area of the cutting beam spot). Table C presents power densities available at selected CO2 beam spots.
Note: Watts of laser power in Table C are those available at the end of the laser articulated arm prior to transmission through the Micro Point micromanipulator.
4.3
Smoke Evacuation
The laser plume is obscuring and noxious. As a potential pollution hazard affecting occupational safety, the plume should be evacuated. Any commercial smoke evacuator designed for use with surgical lasers may be used in conjunction with the Micro Point micromanipulator.
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Laser power
CO2 beam spot diameter (mm) 0.1
0.2
0.3
0.4
0.5
1.0
2.0
3.0
5.0
2
25,465
6,366
2,829
1,592
1,019
255
64
28
10
3
38,197
9,549
4,244
2,387
1,528
382
95
42
15
4
50,929
12,732
5,659
3,183
2,037
509
127
57
20
5
63,662
15,915
7,074
3,979
2,546
637
159
71
25
10
127,324
31,831
14,147
7,958
5,093
1,273
318
141
51
15
190,985
47,746
21,221
11,937
7,639
1,910
477
212
76
20
254,647
63,662
28,294
15,915
10,186
2,546
637
283
102
25
318,309
79,577
35,368
19,894
12,732
3,183
796
354
127
30
381,971
95,493
42,441
23,873
15,279
3,820
955
424
153
35
445,633
111,408
49,515
27,852
17,825
4,456
1,114
495
178
40
509,295
127,324
56,588
31,831
20,372
5,093
1,273
566
204
45
572,956
143,239
63,662
35,810
22,918
5,730
1,432
637
229
50
636,618
159,155
70,735
39,789
25,465
6,366
1,592
707
255
(watts)
Table C
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CO2 laser power densities (watts/cm ) vs. Micro Point spot sizes
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4.4
Micro Point Labels
The one warning label on the Micro Point is shown in Figure 4. Never look into the LASER APERTURE or the micromanipulator when the laser system is energized!
Fig. 4
Fig. 4.1
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“Laser aperture” warning label
Micro Point nameplate
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5 Operation 5.1
Fig. 5
Step 1: Setting the Focal Distance
Setting the focal/working distance on the Micro Point 1 Index mark (arrowhead-shaped) 2 Focal distance indicated on adjusting ring of FDS
Rotate focal distance selector (FDS) Working distance is measured between the objective lens of the operating microscope and the tissue. To set working distance, use the (notched) zoom ring of the FDS located at the rear of the Micro Point telescope (see Figure 5). The focal distance selector is graduated from 200 mm to 400 mm in increments of 50 mm. When using a microscope with fixed marked positions (discrete objective lenses), just rotate the adjusting ring (FDS) until the working distance number matching the lens appears at the arrowhead-shaped index mark. When using a continuously adjustable microscope, first focus your microscope, then rotate the FDS of the Micro Point until the sharp focus (i.e. the smallest spot diameter) is achieved with the aiming beam.
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5.2
Step 2: Setting the Treatment Beam Spot Size
1. Select spot size: The minimum (focused) and maximum (defocused) spot sizes obtainable with your Micro Point micromanipulator are presented in Table D.
DF = defokussiert DF = defocussed
Fig. 5.1
Focus/defocus selector setting
Working distance
Table D
CO2 focused/defocused spot sizes (mm) Minimum (focused)
Maximum (defocused)
200 mm
0.100
2.5
250 mm
0.115
3.0
300 mm
0.125
3.5
350 mm
0.130
4.0
400 mm
0.150
4.5
Focused/defocused spot sizes vs. working distance
2. Rotate focus/defocus selector: The treatment beam spot size is set with the focus/defocus (F/DF) lever located on the ring at the front of the Micro Point telescope (see Figure 5.1). The lever may be positioned at any point between the settings marked “F” and “DF” on the Micro Point telescope. The “F” setting represents the tightest focus and smallest spot size; the “DF” setting represents the maximum defocus position and the largest spot size.
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Martin Micro Point Operating Instructions 3. Evaluate power density: The power densities available at selected CO2 beam spot sizes are presented in Table C. As noted above, spot size and laser power are independently controlled. Make power adjustments in accordance with the instructions given in your laser operating manual.
5.3
Step 3: Controlling the Laser Beams
1. Energize laser and adjust microscope: Set the laser energy level and profile in accordance with the instructions in your laser operating manual. Likewise, make focus and other positioning adjustments on the microscope, following the instructions in the appropriate operating manual. To set the OR microscope in conjunction with the Micro Point micromanipulator, the ocular setting needs to be checked first.
Fig. 5.2
Resetting the oculars
Following attachment of the micromanipulator, focus the operating microscope by adjusting the distance between the microscope and the tissue (see Figure 3.4). If you use a 400-mm lens, the distance is approximately 400 mm.
2. Focus control & spot coincidence: Once the working distance is set correctly (matching the lens of the OR microscope), the Micro Point requires no further adjustments during the operation (as spot coincidence is fully maintained).
3. Check focal distances: To check proper focusing of the CO2 laser beam on the target tissue, set the laser to 10 W, single pulse mode and a pulse length of 10 ms, then switch it to “laser ready”. The pilot or aiming beam should be set to maximum brightness.
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Martin Micro Point Operating Instructions Put a sheet of paper or a wooden tongue depressor onto a laser-proof support (table or plate) and place it into the surgical field. The tongue depressor must now be sharply visible through the OR microscope. Activate the laser, then check the sharpness of the burn spot produced on the wooden surface. The burn spot should be small and round. If this is not the case, adjust the Micro Point’s focal distance by rotating the adjusting ring (2, Figure 5) until a clean, small laser burn spot is produced on the tongue depressor.
a
Fig. 5.3
b
c
Burn spots produced when focal plane of laser is (a) before/above, (b) coincident with, and (c) behind the target or application plane (“b” represents the optimum setting)
4. Joystick operation: Beam control is accomplished with the joystick. Rest your hand comfortably on the ring-shaped hand rest and grasp the joystick. The joystick is connected to the deviating mirror; as you manipulate the joystick, the deviating mirror changes position so as to transmit and reflect the aiming and cutting beams onto the target tissue. The beam spots on the tissue precisely track the movement of the joystick. For example, moving the joystick to the left moves the beam spots to the left; moving the joystick toward you raises the spots, and moving the joystick away from you lowers the spots.
5. Gas irrigation: Connect the thin, flexible gas tube attached to the laser articulated arm to the gas connector of the micromanipulator (see (4), Fig. 5.4). This keeps the optical beam path free from tissue particles and smoke, as a gas flow directed at the deviating mirror inside the micromanipulator is initiated whenever the laser is set to “ready”.
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5.4
Step 4: Mounting the Hand Rest on Opposite Side
1
Hand rest (can be mounted on either side)
3
3/32“ hex socket key
2
1/8“ hex socket key
4
Gas connector
Fig. 5.4
Hand rest (UHS)
The hand rest (universal hand stabilizer, or “UHS”) can attach to either side of the housing assembly. It is mounted on the right side at the factory, but the user can easily move it to the left side. Loosen the external hex nut with the socket key (2), then remove the bracket assembly (1). Remove the inner fastening bolt with key (3) and screw it into the appropriate hole on the left side, then re-attach the hand rest.
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5.5
Step 5: Post-Procedure Disassembly
Detaching the Micro Point micromanipulator: Upon completion of the surgical procedure, prepare the Micro Point micromanipulator for its next utilization as follows (refer to Figures 3.1 through 3.14 as necessary):
Step (1): Turn off power to the laser system and the microscope.
Step (2): Unscrew the laser arm adapter from the adapter receptacle in the tail of the micromanipulator telescope.
Step (3): The Micro Point micromanipulator can either be left mounted on the microscope, or removed and stored in its original packing case to await a subsequent procedure. To remove the Micro Point micromanipulator from a Zeiss microscope, loosen the thumbscrew on the dovetail mounting plate and slide the Micro Point rearward out of the micromanipulator mounting plate and off the microscope.
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6 Maintenance, Repair, and Warranty 6.1
Maintenance Requirements
WARNING • Never autoclave the Micro Point or clean it with sprays or cleaning agents! Otherwise, irreversible damage to the optical components will occur.
The Micro Point is a precision instrument and should be cared for as you might any fine piece of photographic equipment. The primary maintenance requirement is for proper cleaning of the deviating (or beam splitter) mirror. The mirror is routinely exposed to intensive laser light; any surface contaminants will absorb energy and create “hot spots” that could destroy the mirror coating. If the coating is damaged, laser performance is reduced. Therefore, it is especially important that the beam splitter always be kept clean.
6.2
Cleaning the Housing and Telescope
1. External surfaces: Wipe with a clean cloth. If absolutely necessary, cloth may be slightly dampened with hospital disinfectant.
2. Sterilization: The Micro Point micromanipulator is sterilizable by either gas or gamma radiation. If sterilization is necessary, a commercial gamma radiation sterilizer is recommended. Ethylene oxide gas with aeration in a standard cycle not exceeding 52 °C (125 °F) may also be used.
6.3
Cleaning the Beam Splitter
The beam splitter must be cleaned whenever it comes into contact with contaminants, or whenever power anomalies in the laser system produce burn spots on the mirror surface. Please check this before and after each surgical procedure. Only two methods for cleaning the beam splitter may be used: (a) pressurized air-flow, and/or (b) solvent “drag-wipe” (with methanol or a suitable alcoholwater solution). Pressurized air may be used to blow particulate matter from the mirror surfaces. However, if more complete cleaning is indicated, use the solvent “drag-wipe” procedure described below:
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Martin Micro Point Operating Instructions 1. Preparation of work area and materials required: Prepare a clean, lint-free work area that is wellilluminated. Assemble the following materials:
• Lens-cleaning tissues • Solvent dropper bottle with 100% methanol or acetone-ether solution (1:1 ratio)
2. Mirror flushing: Hold the Micro Point firmly in one hand and the solvent dropper in the other. Preliminary cleaning is accomplished by copiously flushing the upper and lower surfaces of the mirror with solvent. Do not use soap or water.
3. “Drag-wipe” cleaning: Final cleaning is done in the following manner:
Fig. 6.1
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Cleaning the laser mirror
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Place a few drops of the solvent on the portion of the tissue that is in direct contact with the mirror surface, then drag the moistened tissue across the mirror surface toward you until it is replaced by dry tissue, as indicated by the arrow in Figure 6.1. Do not reuse the lens-cleaning tissue: use a clean tissue for each drag-wipe. Repeat this cleaning procedure with a fresh tissue as many times as necessary until the mirror surface is perfectly clean.
Repeat these steps for the other side of the beam splitter mirror.
Do not touch the mirror surfaces with your fingers and do not rub! Rubbing would scratch the mirror surfaces and lead to laser light scatter.
6.4
Repairs and Replacements
The Micro Point micromanipulator is factory-repairable only. Report any damage or malfunction to your authorized service representative or contact us direct. For our address and telephone/fax numbers, please refer to the back cover page of this manual.
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6.5
Specifications
The following table summarizes the technical data of the Martin Micro Point micromanipulator:
Dimensions
28 x 7.6 x 5.7 cm (11 x 3 x 2.25 inches)
Weight
0.8 kg Shipping Conditions
Temperature
-40 °C to +50 °C
Relative humidity
5% to 99% (non-condensing)
Atmospheric pressure
700-1060 mbar Operating Conditions
Temperature
+8 °C to +40 °C
Relative humidity
5% to 90%
Atmospheric pressure
700-1060 mbar Operating Performance
Laser wavelength Max. laser input power
Average laser power transmission Beam spot sizes
10600 nm 100 watts, continuous wave (CW) at operating wavelength 85% See Table D Sterilization
Either gamma radiation or ethylene oxide gas with aeration in standard cycle not exceeding 52 °C
Table E
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Specifications
V 1.1
Martin Micro Point Operating Instructions
6.6
Replacement Parts & Accessories
The Micro Point micromanipulator parts and accessories are listed in Table F:
Description Adapter, VM 900 Adapter, dovetail Adapter, laser articulated arm Operating Instructions Table F
6.7
Replacement parts and accessories (available on request)
Product Liability & Warranty
Martin will assume responsibility for the safety, reliability and proper functioning of this unit only if: -
readjustments, modifications or repairs are carried out by authorized persons,
-
the electrical installation of the room where the device is operated complies with IEC requirements,
-
the device is used in accordance with these Operating Instructions.
Any unauthorized repair or modification invalidates the warranty!
Note! A period of warranty as specified in Martin’s Standard Terms and Conditions shall apply. Damage or malfunctions due to operator misuse or improper handling are excluded from the warranty. Be sure to read and understand these Operating Instructions before using the unit!
6.8
Troubleshooting
The reflective optics design of the Micro Point micromanipulator eliminates the operational limitations that affect lens-based systems of laser beam delivery. As a result, Micro Point troubleshooting is greatly simplified. In addition, Martin’s rigorous quality control procedure subjects every Micro Point to extensive testing prior to shipment. This further reduces the likelihood of problems. However, in the unlikely event that you encounter performance difficulties, the Table G troubleshooting suggestions should prove helpful.
V 1.1
37
Martin Micro Point Operating Instructions Description of Problem No illumination of field No aiming beam
Beam spot abnormally large
Loose Micro Point mounting Reduced illumination of field
Aiming beam spot not circular
Excessive laser carbonization
Table G
38
Suggested Action Turn on microscope. a) Turn on power to laser. b) Increase aiming beam brightness. a) Check position of focus/defocus selector; smallest spot size is obtained at position “F”. b) Check setting on focal distance selector; focal distance should match microscope objective lens. c) Check microscope focus and adjust as necessary. Check thumbscrew on microscope manipulator mounting plate; tighten finger-tight. Check condition of beam splitter; clean if necessary. Focal plane of aiming beam differs from target plane. a) Check position of focus/defocus selector; smallest spot size is obtained at position “F”. b) Check setting on focal distance selector; focal distance should match microscope objective lens. c) Check microscope focus and adjust as necessary. Focal plane of laser beam above or below target plane. a) Check position of focus/defocus selector; smallest spot size is obtained at position “F”. b) Check setting on focal distance selector; focal distance should match microscope objective lens. c) Check microscope focus and adjust as necessary.
Micro Point troubleshooting
V 1.1
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01.03 · 90-853-52-21 · Printed in Germany Copyright by Gebrüder Martin GmbH & Co. KG Alle Rechte vorbehalten. Technische Änderungen vorbehalten. We reserve the right to make alterations. Cambios técnicos reservados. Sous réserve de modifications techniques. Ci riserviamo il diritto di modifiche tecniche.
