Technical aspects of single-port thoracoscopic surgery for ...
Thoracoscopic First Assistant -...
Transcript of Thoracoscopic First Assistant -...
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Thoracoscopic First Assistant
S.Scott Balderson PA-CClinical Instructor, Duke Surgical Physician Assistant
ResidencyDivision of Thoracic SurgeryThoracic Oncology Program
Duke Comprehensive Cancer CenterDuke University Medical Center
Durham, NC
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Disclosures
Medtronic– Educational Consultant
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It is all in the preparation; Keys to success!
Proper equipment and instrumentation– List – Normal Operation– Troubleshooting (take ownership!)
Proper room set up– Patient positioning– Monitors– OR Table set up (long curved sponge stick)– The Team!
• Circulator, Scrub, Assistant, Pilot, Surgeon
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Keys to success
Assisting– Piloting– Retraction
• With clamps, suction, graspers, etc.
– Stapling– Troubleshooting
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Equipment and Instrumentation
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Video Tower
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Camera Box, light source, recorder
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10mm 30 degree Thoracoscope; KNOW HOW THE BUTTONS WORK!
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10mm 30 degree Thoracosope
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Alternate Thoracoscopes; know their design and function
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Know the difference between manufacturers.. (chip vs in-line lense)
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In-line design vs chip
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Know which plane you are flying
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Ancillary products for operative issues, ex: Floshield
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Specifically designed thoracoscopicinstruments
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Conventional Design
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VATS Specific Instruments
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VATS Specific Instruments
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Almost any conventional tip is available
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Most frequently used VATS Instruments
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Note the different applications/trade-offs for 10mm vs 5mm suction
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Thoracoscopic Staplers
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Thoracoscopic Staplers
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The manufacturer is not as important as it is critical to have thoracoscopic specifically designed instruments and equipment
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Room Set Up
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The Team
Circulator– Must be familiar with the conduct and steps of the
case.– Must know the staple cartridges and other variable
supplies that will be called for during the case.– Must know how to quickly locate any supplies outside
of the room and anticipate their need.– Be familiar with ordering for par stock etc.
Pilot Surgeon
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The Team
Scrub Tech– Must be familiar with the steps of the procedure– Must know the instruments and equipment including
any local nomenclature. (long curved empty)– Aspire to anticipate which instruments are used for
which maneuvers to facilitate hand off.– Must recognize the importance of table preparation.
(keeping a long curved sponge stick as the instrument closest to the field)
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Patient Positioning
Standard lateral decubitis position– Flex the bed, reversed trendelenburg
• Helps keep the camera from hitting the hip which limits camera angles
– Slightly posteriorly rotated• Makes the anterior incision a little easier to access
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Patient Positioning
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Patient positioning table flexed
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Patient positioning
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Patient positioning-locating strap
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Patient positioning-strap placement
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Patient positioning-check axilla
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Patient Positioning- Secure Arms
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Incision Placement
Two incisions will allow almost any operation– 10 mm camera port
• 7th or 8th intercostal space, posterior axillary line
– 3-4 cm anterior access incision• 4th or 5th intercostal space, anterior axillary line
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Incision Placement
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Room set up- Monitor Placement
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Assisting
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Camera Operations
Camera Pilot needs a working knowledge of the function of the camera/scope/monitors– Proper use of 30 degree, flexible tip or other scope
optimizes the surgeon’s view– In the HD world it is VERY IMPORTANT to understand
how the technology functions and what the technological implications are for the surgeon.
• Ex. Low light = grainy picture = loss of resolution= loss of ability to visualize planes…
– Helpful in troubleshooting
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The stand-by test
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Camera Pilot
Poor Camera operation can make for a painfully long case– When the scope has to be removed to be cleaned– When the pilot has difficulty reintroducing the scope
into a complex hemithorax• Smudge• Reproducing a consistent view in scope angle and horizon
MORE IMPORTANTY, Poor Camera operation can impact the safety of a case– If the surgeon cannot visualize……
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Camera Pilot
Camera Pilot should understand the steps for the intended procedure– Allows anticipation of the surgeon’s next move
The camera view is very much a dance, the surgeon must be allowed to move within the frame as opposed to being led.– The pilot must know (or ask) what should be in the center
of the screen (instrument, structure etc) Goal is for the only perception of movement on the monitor
to be the maneuvers of the surgeon The Pilot must come to appreciate the value and contribution
of controlling the surgeon’s eyes
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Thoracoscope - Design
ALL Thoracoscopes are VERY fragile. 10lbs of force will break a 10mm scope
– The weight of the camera alone can damage the outside casing
– A dent in the casing means that light fibers or the in-line lenses can be broken.
– Think of the times where you THINK the scope is in focus but it is not in certain areas of the field.
3lbs of force will snap a 5 mm scope– Will bow 20 degrees before resistance can be
detected
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10mm vs 5mm
5mm scope is fragile and can be easily damaged 5mm port can be utilized if you are not going to
need to pass a stapler, but the port is more difficult to keep clear. (cotton tipped applicator)
5mm incision can accommodate a 24fr chest tube
10mm optics are better and the port is easier to maintain (lap pad to clean)
10mm scope and camera has better stability and balance
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Visual Field 5mm vs 10mm
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Thoracoscope Design
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What is the problem? It is easy and you can direct the staff as to which piece needs to be switched out Grainy picture = light cord
One part of the picture is in focus and another is not, or there is not a perfect 360 degree circle of field, or there as specks or smudges that can’t be cleaned = scope
The picture is soft and the chest wall capillaries can’t be focused = camera
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Camera Operations
There must be a clear method of communicating the visual (exposure) needs of the surgeon as:
The pilot has three perspectives to maintain: the focal length, camera head rotation and the scope angle.
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Camera Operations Focal Length A depth of field must be developed
– Facilitates depth perception – Close but not too close
• If too close, the camera can affect the instrument angles available to the surgeon
• A tight focal length can be helpful during delicate dissection but hurtful for frame of reference
– Anticipate when to pan in and out• Understanding the action being performed
– Adjusting retraction vs. fine dissection on the artery
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Focal length- loss of reference
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Focal Length – reference(the power of panning out 2cm!!)
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Camera Operations
Camera head rotation controls:Horizon• Refers to the structure on which the
camera view is based.
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Camera Operations
– Third control is the barrel of the light cord which controls the scope angle (exception: Olympus)
– Clock face• Refers to the barrel of the light cord on the
scope relative to the position of the hour hand on a clock
• Functionally, this reference can allow the surgeon to request a different angle without having to reach across to adjust the scope angle.
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Scope Transition 9:00 to 3:00(functionally from right to left)
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Communication
External Cues and Corrective Transitions– Leaning in = tighten up the focal length– Tilted head (in any direction off of neutral = I am
screwing up)– Hyper-extending neck = I need to do something to see
over the top– Head off kilter or “Batman” = Camera Drift= I am off
of the horizon
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Camera Operations
Together the focal length, horizon and scope angle facilitate visual feedback to create as close to a three dimensional view as possible
Optimizing these controls also minimize the incidence of intercostal nerve irritation
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Camera Piloting- small hands, no problem!
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Piloting Technique-One Hand (1)
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Piloting Technique-One Hand (2)
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Piloting Technique-Two hand (angle)
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Piloting Technique-Scope Stabilization
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Piloting Technique-Parallel with one hand stabilization at the scope – know your pilot is in R spin
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Piloting Technique-Isomer View Surgeon is in R spin(how well can you back up a trailer from your rear view mirror)
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Isomer View - Difficult
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Memorize the Path of Entry
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No matter how complicated the Path
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Resist the temptation to remove the scope- smudge or no smudge?
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Intercostal Blocks
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Diaphragmatic Retraction
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The Durability of LingularRetraction
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Synergy of Retraction and Scope Angle
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Retraction to Rotate the Hilum
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Know the function and angles of your instruments!
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Don’t Spill Staples- Nidus for Adhesions
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It Really works
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Use Multiple Instruments for Maximal Advantage (2 for 1)
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Always ask Anesthesia the Question!
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When an endobag is not available..
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Use Sterile Water to Detect Bleeding
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Put it all together- R VATS MLND