- •Acknowledgment
- •Abbreviations and Glossary
- •Contents
- •Introduction
- •1: Should You Become a VR Surgeon?
- •2.2 A Word of Caution
- •Introduction
- •3: Fundamental Rules for the VR Surgeon
- •3.4 The “What, When, How – and Why” Questions
- •3.5 Don’t Start What You Cannot Finish
- •3.6 Common Sense vs Dogma
- •3.7 Maximal Concentration During the Entire Operation
- •3.8 Make Life as Easy for Yourself as Possible
- •3.9 Under Peer Pressure: To Yield or Not to Yield
- •3.10 Referral of the Patient
- •3.11 The Rest of the Eyeball…
- •4.1 What If the Surgeon Has Tremor?
- •4.2 How Important Is Good Dexterity?
- •4.5 Combined Surgery or Cataract Surgery Separately?
- •4.7 How Much Confidence in Himself Should the VR Surgeon Have?
- •4.8 How Long Do Vitrectomies Take?
- •4.9 Was Surgery Successful?
- •5.1 The “Target” of Counseling
- •5.2 The Patient Does Not Know Most of What Is so Obvious to the Surgeon
- •5.3 Communicating with the Patient
- •5.4 Coaching vs Trying to Be Objective
- •5.5 The Ultimate Treatment Decision: “Whose Eye Is It?”
- •5.6 Which of the Two Eyes to Operate on First?
- •5.7 What if the Eye Has Two Diseases?
- •5.8 What if the Eye Has Severe Visual Loss and the Chance of Improvement with Another Surgery Is Low?
- •5.9 Empathy: The Single Most Important Component of Counseling
- •5.10 The Prognosis with the Chosen Surgical Option
- •5.11 If the Patient Chooses to Undergo Surgery
- •5.12 The Benefits of Proper Counseling
- •5.14 The Dogmas
- •6: The VR Surgeon’s Relation to His Nurse
- •7: Examination
- •8: The Indication Whether to Operate
- •8.1 The Argument in Favor of Surgery
- •8.3 The Age of the Patient
- •8.4 The Condition of the Fellow Eye
- •11: The Surgeon’s Relation to Himself
- •11.3 Self-Examination
- •Introduction
- •12.1.1 The Pump
- •12.1.1.1 Peristaltic Pump: Flow Control
- •12.1.2 The Probe
- •12.1.2.2 Port Location
- •12.1.2.3 Port Configuration and Size
- •12.1.2.4 Cut Rate
- •12.1.2.6 Probe Length
- •12.1.3 The Light Source/Pipe
- •12.1.4 The Infusion Supply
- •12.1.5 The Trocar
- •12.1.6 The Cannula
- •12.1.7 System to Inject/Extract Viscous Fluid
- •12.1.8 The Pedal
- •12.1.10 Endodiathermy Probe
- •12.1.11 The User Interface of the Vitrectomy Console
- •12.1.12 Troubleshooting
- •12.2 The Microscope
- •13: Instruments, Tools, and Their Use
- •13.2.1.1 General Concepts of Working with Squeezable Instruments
- •13.2.1.2 The Handle
- •13.2.1.3 Forceps
- •13.2.1.4 Scissors
- •13.2.2 Hybrid Instruments
- •13.2.2.2 Retractable Instruments
- •13.2.3 Non-squeezable Hand Instruments
- •13.2.3.1 Bent (Hooked, Barbed) Needle
- •13.2.3.2 Membrane Scraper
- •13.2.3.3 Spatula/Pic
- •13.2.3.4 Intraocular Magnet
- •13.3.1 Membrane Dissection (“Viscosurgery”): Viscoelastics as a Spatula
- •13.3.2 Opening a Closed Funnel
- •14: Materials and Their Use
- •14.2 Intravitreal Gas
- •14.3 Silicone Oil
- •14.3.1 Types of Silicone Oil
- •14.3.3 Complications Related to Silicone Oil Use
- •14.3.4 Complications Related to Silicone Oil Use Removal
- •14.4 PFCL
- •14.6 Sutures
- •15: Anesthesia
- •15.1 How to Decide the Type of Anesthesia
- •15.2 If Local Anesthesia Is Chosen
- •15.3 Medications If Local Anesthesia Is Used
- •16: The Surgeon at the Operating Table
- •16.1 The OR Personnel
- •16.2 The Operating Table and the Surgeon’s Chair
- •16.2.1 The Operating Table
- •16.2.2 The Surgeon’s Chair
- •16.4 The Microscope
- •16.5 The BIOM
- •16.5.1 BIOM: The Advantages
- •16.5.2 BIOM Use: Practical Information
- •16.5.3 BIOM: Setting Up for Daily Use
- •16.5.4 BIOM: Checklist
- •16.5.5 BIOM: Troubleshooting
- •16.6 The Patient
- •16.7 The Surgeon
- •16.7.2 At the Start of Vitrectomy
- •16.7.3 Staring into the Microscope
- •16.8 Music in the OR
- •16.9 The Brightness in the OR
- •16.10 The Quality of the Air in the OR
- •16.12 The Blueprint of the OR
- •16.13 The Captain in the OR
- •16.14 The Fundamental Technical Rules of Performing Intravitreal Surgery
- •Introduction
- •17.3 The Endoscope Approach (EAV)
- •17.4 Portable Systems
- •17.5 3D Viewing
- •18.1 Disinfection and Draping
- •18.2 The Monocular Patient
- •18.3 At the Conclusion of the Operation
- •19: The Speculum and Its Placement
- •19.1 General Considerations
- •19.2 Speculum Placement
- •20.3 Injecting into the Vitreous Cavity During Surgery
- •21: Sclerotomies and the Cannulas
- •21.2 Location of the Sclerotomies
- •21.2.1 Distance from the Limbus
- •21.2.2 Location in Clock Hours
- •21.2.3 In Case of a Reoperation
- •21.2.4 In Case of Scleral Thinning
- •21.3 Inserting the Cannula
- •21.4 The Order of Cannula Placement
- •21.5 If the Palpebral Opening Is Small
- •21.6 Checking the (Infusion) Cannula
- •21.6.1 Cannula Under the Choroid/Retina: Prevention
- •21.6.2 Cannula Under the Choroid/Retina: Management
- •21.6.3 Infusion Going Under the Choroid/Retina: Management
- •21.7 The Cannulas in Use
- •21.8 The Removal of the Cannulas
- •21.8.1 Hypotony: The Causes
- •21.8.2 Hypotony: The Consequences
- •21.8.3 Hypotony: Prevention
- •21.8.4 Hypotony: Postoperative Management
- •22: Illumination
- •22.1 The Light Pipe
- •22.3 Light Built into the Handheld Instruments
- •24: Using the Vitrectomy Probe
- •24.1 Removal of the Vitreous
- •24.2 Removal of Proliferative Membranes
- •24.3 Removal of the Retina
- •24.4 Removal of the Lens
- •25: Maintaining Good Visualization
- •25.1.1 The Microscope
- •25.1.2 The Contact Lens
- •25.1.3 The Corneal Surface
- •25.1.4 The Corneal Stroma
- •25.2 Internal Factors
- •25.2.2 Pupil
- •25.2.2.1 Mechanical Forces Preventing Pupil Dilation
- •25.2.2.2 Intracameral Adrenalin or Visco
- •25.2.2.4 Iris Ring
- •25.2.2.5 Iridotomy
- •25.2.3 Lens
- •25.2.3.1 Cataract
- •25.2.3.2 “Feathering”
- •25.2.3.3 “Gas Cataract”
- •25.2.3.4 “Lens Touch”
- •25.2.4.1 Phimosis of the Anterior Capsule
- •25.2.4.2 Deposit on the Anterior IOL Surface
- •25.2.4.3 Problems with the IOL Itself
- •25.2.4.4 Fluid Condensation
- •25.2.5 The Posterior Capsule
- •25.2.6 The Vitreous Cavity
- •25.2.7 Epiretinal (Subhyaloidal) Materials
- •25.2.7.1 Blood
- •25.2.8 The Surgeon’s Actions
- •25.2.9 “Chromovitrectomy”
- •26.1.1 Vitreous Macroanatomy
- •26.1.2 Vitreous Biochemistry and Its Anatomical and Functional Implications
- •26.1.3 Retinal Histology and Macroanatomy
- •26.1.4 Anterior Segment Dimensions
- •26.2 External Anatomy for the VR Surgeon
- •26.3 Physiology: What Keeps the Retina Attached?
- •26.3.1 The RPE Pump
- •26.3.3 Presence of the Vitreous Gel
- •27: The Basics of Vitreous Removal
- •27.1 The Rationale for PPV
- •27.2 How Much Vitreous to Remove?
- •27.3 Recognizing the Presence of the Vitreous Gel
- •27.3.1 Mechanical Aids
- •27.3.2 Air (Pneumovitrectomy)
- •27.3.3 Stains and Markers
- •27.4 The Sequence of Vitreous Removal
- •27.5.2 Vitrectomy Anterior to the Equator
- •27.5.3 Vitrectomy Behind the Lens
- •28: Scleral Indentation
- •28.1 The Advantages of Scleral Indentation
- •28.2 The Mechanics of Vitrectomy with Scleral Indentation
- •28.3 Internal vs External Illumination
- •28.5 External Illumination and Nurse Indentation
- •28.6 Instrumentation and Technique
- •29: Cryopexy
- •29.1 Indication in RD
- •29.2 Surgical Technique
- •29.3 Cryopexy as a Destructive Force
- •30: Endolaser
- •30.1 The Consequences of Laser Treatment
- •30.2 The Setup
- •30.3 The Technique of Endolaser Treatment
- •30.3.1 General Considerations
- •30.3.2 Panretinal Treatment
- •30.3.3 Endolaser Cerclage and Its Complications
- •30.3.4 Endolaser as a Walling-Off (Barricading) Tool
- •30.3.5 Endolaser as a Welding Tool
- •30.4 Peripheral Laser and the Beginner VR Surgeon
- •30.5 Endocyclophotocoagulation
- •30.6 Laser Cerclage at the Slit Lamp
- •31: Working With and Under Air
- •31.1.1 Attached Retina
- •31.3 The Utilization of an Air Bubble
- •32: Working with Membranes
- •32.1.1 Instrumentation and Infrastructure
- •32.1.2 Opening the ILM
- •32.1.2.1 Sharp Opening: Incision First
- •32.1.2.2 Blunt Opening: No Incision
- •The Scraper
- •32.1.3 Peeling the Membrane
- •32.1.4 The Extent of ILM Peeling
- •32.1.5 What If the ILM Cannot Be Peeled?
- •32.1.6 ILM Removal in Eyes with Detached Macula
- •32.1.6.1 Reattaching the Macula First
- •32.1.6.2 Peeling When the Macula Is Still Detached
- •32.2.2 Removal Technique
- •32.2.2.1 Staining or Not?
- •32.2.2.2 Instrumentation
- •32.2.2.3 Location of the Point of Attack
- •32.2.2.4 The Major Risks When First Grabbing an EMP
- •32.2.2.5 The Direction of Peeling: Centripetal vs Centrifugal
- •32.2.2.6 The Speed of Peeling
- •32.2.2.7 The Extent of Peeling
- •32.2.2.8 ILM Peeling
- •32.2.2.9 Completion of Surgery
- •32.3.1.1 Recognition
- •32.3.1.2 The Goals of Surgery
- •32.3.1.3 Instrumentation
- •32.3.1.4 Surgical Steps
- •32.3.1.5 Closed Funnel/Retinal Incarceration
- •32.3.1.6 ILM Removal
- •32.4 Subretinal Membranes/Strands
- •33.1 Retinectomy
- •34: Chromovitrectomy
- •34.1 Posterior Vitreous Cortex
- •34.3.1 False-Positive Staining with ICG
- •34.3.2 Injection Technique for Staining the ILM
- •34.4 Newly Formed (PVR) Membranes
- •35: Tamponades
- •35.2 Gases
- •35.2.1 General Considerations
- •35.2.3 Gas Injection into the Nonvitrectomized Eye
- •35.2.4 The Eye with Gaseous Tamponade
- •35.3.1 Indications to Use Heavier-Than-Water Liquids
- •35.3.2 Surgical Technique
- •35.3.2.1 Implantation
- •35.4 Silicone Oil
- •35.4.1 Selecting the Type of Silicone Oil to Implant
- •35.4.2 General Considerations
- •35.4.3 Indications
- •35.4.3.1 Semipermanent Tamponade
- •35.4.3.2 Permanent Tamponade
- •35.4.4 Implantation
- •35.4.5 With Silicone Oil in the Eye
- •35.4.5.1 General Considerations
- •35.4.5.2 Emulsification
- •35.4.6 Removal
- •35.4.6.1 Timing
- •35.4.6.2 Surgical Technique
- •35.5 Exchanges
- •35.6 If the Eye Is Aphakic
- •36: Submacular Hemorrhage
- •36.1 The Nonsurgical Approach: Intravitreal Gas and tPA
- •36.2 Removal of the Clot In Toto
- •36.4 The Minimalistic Surgical Approach
- •37: Subretinal Biopsy
- •38: Combined Surgery
- •38.1 Phacoemulsification
- •38.2 Lensectomy
- •38.2.1 Lens In Situ
- •38.3.1 Lens In Situ
- •38.3.2 Lens in Vitreous
- •38.4.2 No IOL Implantation
- •38.5 Capsule Removal
- •38.5.1 Indications
- •38.5.2 Surgical Technique
- •38.6.1 Advantages
- •38.6.2 Surgical Technique
- •38.6.3 Subsequent Sub/luxation of an Iris-Claw IOL
- •38.6.3.1 Subluxated Lens
- •38.6.3.2 Luxated Lens
- •39: AC Basics
- •39.1 Paracentesis
- •39.2 Iris Prolapse
- •39.3 Anterior Synechia
- •39.5 Material in the AC
- •40.2 Retinal Tear
- •40.3 Reopening of a Posterior Scleral Wound
- •40.4 Lens/IOL Trauma
- •41: Pediatric Patients
- •42: The Highly Myopic Eye
- •42.1 The Risk of RD If Cataract Surgery Is Needed
- •42.2 Vitrectomy in the Highly Myopic Eye
- •42.3 Posterior RD over a Staphyloma
- •43: Intravitreal Injections
- •Introduction
- •44: Dropped Nucleus and Dislocated IOL
- •44.1 General Considerations
- •44.1.2 Dislocated IOL
- •44.2 Surgical Technique
- •44.2.1 Dropped Nucleus
- •45: Endophthalmitis
- •45.1 General Considerations
- •45.1.1 Etiology
- •45.1.2 Clinical Diagnosis
- •45.1.3 Timing
- •45.1.4 Treatment Options and Management Philosophy
- •45.2 Surgical Technique
- •45.3 Posttraumatic Endophthalmitis
- •46: Floaters
- •46.1 General Considerations
- •46.1.1 Indication for Surgery
- •46.1.2 Timing of Surgery
- •46.2 Surgical Technique
- •47: Hyphema
- •47.1 General Considerations
- •47.1.1 The Rationale for Surgical Removal
- •47.1.2 Medical Treatment
- •47.2 Surgical Technique
- •47.2.1 Liquid Blood
- •47.2.1.1 Monomanual Technique
- •47.2.1.2 Bimanual Technique
- •47.2.2 Clotted Blood
- •48: Iris Abnormalities
- •48.1 General Considerations
- •48.1.2 Timing of Iris Reconstruction
- •48.2 Surgical Technique
- •48.2.2 Iridodialysis
- •48.2.3 Permanent Mydriasis
- •49: Macular Disorders: Edema
- •49.1 General Considerations
- •49.1.1 Etiology
- •49.1.2 Indications for Treatment: Surgical or Nonsurgical?
- •50.1 General Considerations
- •50.1.1 VMTS
- •50.1.2 Cellophane Maculopathy
- •50.1.3 Macular Pucker
- •50.1.4 Macular Hole
- •50.2.1 VMTS
- •50.2.2 Cellophane Maculopathy
- •50.2.3 Macular Pucker
- •50.2.4 Macular Hole
- •50.2.5 If Surgery Failed for a Macular Hole
- •51: Optic Pit
- •51.1 General Considerations
- •51.2 Surgical Technique
- •52.1 General Considerations
- •52.1.1 Indications
- •52.1.2 Preoperative Considerations
- •52.2 Surgical Technique
- •53.1 General Considerations
- •53.2 Surgical Technique
- •54: Retinal Detachment
- •54.1.1 RD Due to a Horseshoe or Giant Tear
- •54.1.2 RD Due to a Dialysis
- •54.1.3 RD Due to a Round Hole
- •54.1.4 RD Due to a Staphyloma
- •54.2 Additional Information About RD
- •54.2.1 History
- •54.2.3 Clinical Course
- •54.2.4 Using Laser to Prevent RD Development
- •54.2.4.1 Prophylaxis in the Affected Eye (RD, Current or Past)
- •54.2.4.2 Prophylaxis in the Fellow Eye
- •54.2.4.3 The Patient with a History of a Retinal Tear (No RD)
- •54.3 Treatment Principles
- •54.3.2 The Goals of Surgery
- •54.3.3 Prognosis
- •54.4.1 Preoperatively
- •54.4.2.1 Initial Steps
- •54.4.2.2 Creating a Chorioretinal Adhesion
- •54.4.2.3 Drainage of the Subretinal Fluid
- •54.4.2.5 Suturing
- •54.4.2.7 Adjusting the Buckle
- •54.4.2.8 Closing the Conjunctiva
- •54.4.2.9 Gas Tamponade
- •54.4.3 Major Intraoperative Complications of SB
- •54.5 Vitrectomy
- •54.5.2.3 Intraoperative Retinal Reattachment
- •54.5.2.4 Laser Retinopexy
- •54.5.2.5 Intraocular Tamponade
- •54.5.2.6 Postoperative Positioning
- •54.5.3 Follow-Up Visits
- •54.5.4 Prognosis
- •54.5.5 RD After Silicone Oil Removal
- •54.6 Pneumatic Retinopexy
- •54.6.1 General Considerations
- •54.6.2 Patient Selection
- •54.6.3 Surgical Options
- •54.6.3.1 Cryopexy, Followed by Gas Injection
- •54.6.3.2 Gas Injection, Followed by Laser
- •54.7 Reoperation
- •55: RD, Tractional and Combined
- •55.1.1 Characteristics of the RD
- •55.1.2 Management Principles
- •56: RD, Central
- •56.1 General Considerations
- •56.2 Surgical Technique
- •57: Retinoschisis
- •57.1.1 Anatomy and Pathophysiology
- •57.1.2 Prophylactic Laser Treatment
- •57.2 Surgical Technique
- •58.1 General Considerations
- •58.1.1 Treatment Options
- •58.1.2 The Vitrectomy Option
- •58.2 Surgical Technique
- •59: Scleroplasty
- •59.1 General Considerations
- •59.2 Surgical Technique
- •60: Suprachoroidal Hemorrhage
- •60.1.1 Indications for Surgery
- •60.1.2 Timing of Surgery
- •60.2 Surgical Technique
- •61: Uveitis, Posterior
- •62: Vitreous Hemorrhage
- •62.1 General Considerations
- •62.2 Surgical Technique
- •62.3 Severe Bleeding in a Young Patient
- •62.4 Rebleeding in a Vitrectomized Eye
- •63: Trauma
- •63.1 The Timing of Surgery
- •63.2 Contusion
- •63.3 Wound Toilette
- •63.5 Suturing the Sclera
- •63.6 Subluxated Lens
- •63.7 IOFB
- •63.7.2 Posterior Segment
- •63.8 Perforating Trauma and Ruptures
- •63.9 NLP and Sympathetic Ophthalmia
- •63.11 Hemorrhagic RD
- •63.12 Additional Considerations
- •64: Postoperative Care
- •Further Reading
- •Appendix
- •Part 2. Important Personal Experiences
3.4 The “What, When, How – and Why” Questions |
|
25 |
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|
|
||
Table 3.3 Adapting “eye to surgeon” vs “surgeon to eye”* |
|
|
||
|
Adapting eye to |
|
Adapting |
|
Example |
surgeon |
Comment |
surgeon to eye |
Comment |
Cataract in a eye |
Phacoemulsification |
Because the posterior |
Removal of |
No vitreous, no |
of 20 D |
with in-the-bag IOL |
capsule must be |
the lens in |
traction, which, |
myopia |
implantation; the |
preserved so that |
totoa and not |
along with the |
|
IOL power is 0 D |
an in-the-bag IOL |
implanting |
laser treatment, |
|
|
implantation can |
an IOL at |
virtually |
|
|
be performed |
all; total or |
eliminates the |
|
|
|
subtotal |
RD risk. |
|
|
|
PPVb; |
Preserving the |
|
|
|
prophylactic |
capsule(s) |
|
|
|
endolaser |
brings no |
|
|
|
cerclage |
benefit |
Traumatic |
Anterior vitrectomy; |
The situation usually |
Pars plana |
While this is a |
cataract in an |
phacoemulsification; |
results in a perfect |
lensectomy |
more complex |
eye that |
capsular tension |
anatomical |
and anterior |
surgery than |
suffered a |
ring; in-the-bag IOL |
situation at the |
vitrectomy; |
the one |
contusion; |
implantation |
completion of |
removal of |
described in the |
there is mild |
|
surgery. However, |
the lens |
second column, |
phacodonesis, |
|
the condition of the |
capsules; |
the long-term |
the lens is |
|
remaining zonules |
prophylactic |
risk of IOL |
slightly |
|
is unknown |
endolaser |
dislocation as |
dislocated |
|
intraoperatively: |
cerclage; |
well as the RD |
(tilted |
|
there is a risk of |
implantation |
risk have been |
posteriorly in |
|
postoperative IOL |
of an iris |
properly |
one quadrant), |
|
dislocation. |
claw lens |
addressed – |
and the |
|
Furthermore, the |
|
even if the |
vitreous has |
|
long-term RD risk |
|
latter risk is not |
prolapsed into |
|
has not been |
|
going to be |
the AC |
|
addressed |
|
zero |
RD with rather |
Three radial buckles; |
Even if the |
PPV; |
The PVR risk is |
central |
cryopexy or laser; |
anatomical |
endolaser |
not negligible; |
breaks at 2, |
gas tamponade |
outcome is |
cerclage; |
treatment |
5, and 9 |
|
excellent, the |
gas or |
without |
o’clock |
|
surgery has |
silicone oil |
prevention is |
|
|
significant |
tamponade |
inadequate |
|
|
morbidity |
|
|
*Shortened terms describing a surgeon who applies, pretty much unchanged, his usual approach regardless of the individual circumstances vs a surgeon who changes his approach according to what the individual situation demands.
aTo keep the eye “compartmentalized” was an extremely important issue in the ICCE era when combined surgery was performed but no laser therapy was available – many eyes were lost to neovascular glaucoma. Compartmentalization has lost its significance since.
bSee Table 27.2.
Pearl
Just as it is unwise to initiate therapy without a diagnosis, it is wrong to perform surgery or any surgical manipulation as a reflex or instinct. The surgeon must make conscious decisions concerning all strategic issues and every tissue manipulation prior to any action.
26 |
3 Fundamental Rules for the VR Surgeon |
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|
In my many visits to many operating rooms as a trainee, I found surprisingly few surgeons who honestly answered my “why?” questions. Several surgeons were clearly annoyed and did not give an answer at all. Many of those who did answer gave useless ones,11 answers that clearly told me: I do not have a rational explanation for why I’m doing what I’m doing (see Table 2.1).
I encourage every visitor in my operating room to ask me the most fundamental question: “Why did you do that?”12 It is extremely rare that I cannot give a rationale for my action.13
3.5Don’t Start What You Cannot Finish
Typically, the first surgery has the best chance of success, and with each successive operation the prognosis gets poorer. If a surgeon cannot complete the intervention because he reached the limit of his expertise or the equipment is lacking,14 the eye’s condition may have worsened.
Removal of a VH in an eye with complete PVD is perhaps the easiest indication for PPV.
However, if the PVD in incomplete and there is VR adherence in an area of noPVD, even an experienced surgeon can cause a retinal break and even intraoperative RD (see Sect. 58.2).
Q&A
Q Which are the easy cases for the inexperienced fellow to operate on?
AIt is impossible to say. What may look easy preoperatively can quickly turn into a disaster in the hands of a surgeon who lacks the proper expertise. This is why the fellow needs to assist in VR surgery for extended periods before gradually being guided into the surgeon’s role. Unsuccessful surgeries early into one’s career are not “only” harmful for the patients but also for the surgeon’s self-confidence (see Sect. 4.7). This is especially true if the stakes for the patient are exceptionally high, such as when he is monocular (see Sect. 8.4).
11“Because I always do it this way”; “because that’s what I was taught”; “what do you mean?”
12Why did you use a bent needle and not a forceps to lift that membrane? Why did you cut the subretinal strand rather than take it out? Why did you just change the direction of peeling the ILM? The fellow must behave in the OR as a young child who is constantly “pestering” his parents with “why?” questions.
13If I cannot answer a visitor’s “why?”question, it forces me to reconsider the issue in question to either find the rationale for it or look for a more effective option.
14Another evidence in favor of planning all aspects of surgery well in advance.
3.7 Maximal Concentration During the Entire Operation |
27 |
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3.6Common Sense vs Dogma
Common-sense thinking is a must-have attribute of the VR surgeon.15 One’s approach to the treatment of a condition must have a rational basis, and this rational does not tolerate dogmas – even if that dogma seems to have a solid scientific foundation.16 First, not all scientific questions are amenable to an answer by a study with level 1 evidence. Second, even if such a study exists and its results seem to have an obvious answer to a particular problem, it still must pass the “smell test,” that of: “Does it make sense to do this?”17 Third, just because a study’s conclusions are statistically valid, there is great variability in how an individual responds to the same therapy.18 This is another reason for each surgeon to develop his own “my way” philosophy (see Sect. 11.4).
3.7Maximal Concentration During the Entire Operation
•Once you are sitting at the operating table, you must have your undivided attention to be focused on the eye and do so throughout the entire procedure.19
•It can lead to tragedy if you lose concentration, regardless of why.
–External factors (e.g., overhearing two nurses gossiping about a colleague).
–Internal factors (e.g., the manipulations are easy and straightforward,20 and the operation is proceeding smoothly with no apparent risk of intraoperative complications).
Unexpected events can rapidly occur, making a problem of minor significance (e.g., during that “easy” EMP removal the surgeon comes across a small area of strong VR adhesion) into a disaster (the peeling force/direction is not changed in time and an easy-to-avoid retinal tear is caused).
15I recently heard a presentation by a well-known retina specialist about a patient with diabetic macular edema. He received 36 monthly intraocular injections (at ~$2,000 each); the plan was to continue the treatment. Common sense tells you that if a therapy is expensive and does not work, you do not “blindly” follow a study’s blanket recommendation but switch therapy.
16This principle extends to include studies that are “evidence-based.” Just because such proof of the efficacy of a certain treatment option once existed, it does not necessarily mean that years after the publication of that study it still holds water.
17The British Medical Journal published a sarcastic article in December 2003 about the “effectiveness of [the] parachutes,” stating that this “has not been subjected to rigorous evaluation by using randomized controlled trials… everyone might benefit if the most radical protagonists of evidencebased medicine organized and participated in a double-blind, randomized, placebo-controlled, crossover trial of the parachute.”
18In other words, Mr. A. will do fine with therapy X, but Mr. B. is better off with therapy Y.
19The football (soccer) coach’s cliché warning to his players is that the game lasts 90 min; whether the other team wins by scoring in the first or last minute does not matter, you still lose.
20Such as panretinal endolaser treatment, which requires very little “brain work.” A surgeon who delivers over 2,000 spots is at risk of losing focus and venturing too close to the fovea (see Sect. 30.3.2.).
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3 Fundamental Rules for the VR Surgeon |
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A corollary to the “maximum concentration” rule is for the surgeon to never take his eye off the operating field as long as any instrument is inside the eye. If he needs an instrument to be exchanged, he must blindly hand it to the nurse and accept blindly what she places in his hand (see Chap. 6 and the Appendix, Part 2).
3.8Make Life as Easy for Yourself as Possible
I often hear surgeons stating that they do not need any extra help (such as mechanical support for their hands, staining of the ILM, support from a well-trained assistant). I do not question these statements: I am also able to remove an unstained ILM without hand support or do scleral indentation myself. However, I still prefer having wrist support (see Sect. 16.2), stain the ILM (see Sect. 34.3), and often ask my assistant to do scleral indentation (see Sect. 28.4) because it makes the operation safer and easier.
Pearl
The surgeon should try to reach his strategic and tactical goals via the least complicated and most effective, safest, and fastest way possible.
3.9Under Peer Pressure: To Yield or Not to Yield
There will be moments when the surgeon feels pressured by his peers, his patients, the industry, or the medical bureaucracy to abandon his own idea (“my way”) and “go mainstream” instead.
Every surgeon must make an individual decision whether to bow to such outside pressure.21
Q&A
Q Should the VR surgeon bow to peer pressure?
AIt is not possible to entirely neglect the outside world. Some of this pressure, for whatever reason, is absolutely overwhelming: the “disposable everything” trend is unstoppable. Some of the pressure can be resisted but is still futile: 20 g PPV will sooner or later disappear as companies will not manufacture the tools for it. The pressure, however, should be resisted if the surgeon feels strongly about it (e.g., using scissors, not the probe, to cut proliferative membranes on the retinal surface). An example why to resist peer pressure is given in Sect. 13.2.3.2.
21 Or insist on his “my way” approach.
- #28.03.202639.38 Mб0The Wills eye manual office and emergency room diagnosis and treatment of eye disease Adam T. Gerstenblith, Michael P. Rabinowitz.chm
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- #28.03.202614.01 Кб0[Офтальмология] Jack J. Kanski Джек Дж. Кански - Клиническая офтальмология систематизированный подход [2006, PDF DjVu, RUS] [rutracker-5395873].torrent
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