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Atlas of Endoscopic Sinus and Skull Base Surgery E-Book

Atlas of Endoscopic Sinus and Skull Base Surgery E-Book

Alexander G. Chiu | James N. Palmer | Nithin D Adappa

(2018)

Additional Information

Book Details

Abstract

Gain a clear understanding of the entire spectrum of today’s rhinology and anterior skull base surgery with Atlas of Endoscopic Sinus and Skull Base Surgery, 2nd Edition. This thoroughly updated title increases your knowledge and skill regarding both basic or advanced procedures, taking you step by step through endoscopic approaches to chronic sinus disease, nasal polyps, pituitary tumors, cerebrospinal fluid leaks, sinonasal tumors, and more.

  • Covers the full range of modern rhinology and anterior skull base surgery, from septoplasty and sphenoethmoidectomy to extended frontal sinus procedures, endoscopic craniofacial resections and complex skull base reconstructions.
  • Clearly conveys the anatomy and detailed steps of each procedure with concise, step-by-step instructions; visual guidance features high-definition, intraoperative endoscopic photos paired with detailed, labeled anatomic illustrations.
  • Includes new content on anterior skull base surgery that reflect new developments in the field.
  • Helps you provide optimal patient care before, during, and after surgery with detailed information on relevant anatomy and surgical indications, instrumentation, potential pitfalls, and post-operative considerations.

Table of Contents

Section Title Page Action Price
Front Cover Cover
IFC ES1
ATLAS OF Endoscopic Sinus and Skull Base Surgery i
ATLAS OF Endoscopic Sinus and Skull Base Surgery iii
Copyright iv
Dedication v
CONTRIBUTORS vii
PREFACE xi
CONTENTS xiii
VIDEO CONTENTS xv
1 - Nasal Surgery 1
1 - Septoplasty 3
INTRODUCTION 3
ANATOMY7–9 3
PREOPERATIVE CONSIDERATIONS 3
RADIOGRAPHIC CONSIDERATIONS4,12 3
INSTRUMENTATION (FIG. 1.3) 4
PEARLS AND POTENTIAL PITFALLS 4
SURGICAL PROCEDURES 5
Traditional Septoplasty5,7,11 5
Step 1: Initial Incision 5
Step 2: Elevation of Mucoperichondrial Flaps 5
Step 3: Removal of Offending Cartilage and Bone 5
Step 4: Closure of the Septal Pocket and Incision 5
Caudal Septal Deformities5,7,11,16 5
Step 1: Initial Incision and Elevation of Mucoperichondrial Flaps 5
Step 2: Reduction of Cartilage Memory 5
Step 3: Swinging Door/Doorstop Techniques 5
2 - Basics of PrimaryEndoscopic Sinus Surgery 39
6 - Maxillary Antrostomy 41
INTRODUCTION 41
ANATOMY (FIGS. 6.1, 6.2, AND 6.3) 41
Radiographic Considerations 41
INSTRUMENTATION (FIG. 6.6) 41
PREOPERATIVE CONSIDERATIONS 41
PEARLS AND POTENTIAL PITFALLS 45
Pearls 45
Potential Pitfalls 46
SURGICAL PROCEDURE 46
Step 1: Medialize the Middle Tubinate 46
Step 2: Outfracture the Inferior Turbinate to Better Visualize the Middle Meatus 46
Step 3: Remove the Uncinate Process and Identify the Natural Ostium 47
Step 4: Reflect and Remove the Superior Uncinate Process (Fig. 6.11) 47
Step 5: Remove the Inferior Uncinate Process (Fig. 6.12) 47
Step 6: Enlarge the Antrostomy by Removing the Posterior Fontanelle (Fig. 6.13) 47
Step 7: DĂ©bride Polyps Within the Maxillary Sinus (If Present; Fig. 6.14) 49
POSTOPERATIVE CONSIDERATIONS 49
SPECIAL CONSIDERATIONS 50
7 - PARTIAL AND COMPLETE ETHMOIDECTOMY 51
INTRODUCTION 51
ANATOMY 51
Anterior Ethmoids 51
Posterior Ethmoids 51
Basal Lamellae 51
Onodi Cell 53
PREOPERATIVE CONSIDERATIONS 53
Radiographic Considerations 53
Cribriform Plate and Skull Base 54
INSTRUMENTATION (FIG. 7.7) 54
PEARLS AND POTENTIAL PITFALLS 55
Pearls 55
Potential Pitfalls 55
SURGICAL PROCEDURE 56
Step 1 56
Step 2 56
Step 3 56
Step 4 56
Step 5 56
Step 6 57
Step 7 57
Step 8 57
POSTOPERATIVE CONSIDERATIONS 57
8 - SPHENOIDOTOMY 59
INTRODUCTION 59
ANATOMY 59
Sphenoid 59
Onodi Cell 59
Vasculature 59
PREOPERATIVE CONSIDERATIONS 59
INSTRUMENTATION 60
PEARLS AND POTENTIAL PITFALLS 60
SURGICAL PROCEDURES 61
Transnasal Sphenoidotomy 61
Step 1 61
Step 2 61
Transethmoid Sphenoidotomy 63
Dilation of the Natural Os 63
Bolger Box Method 63
SPECIAL CONSIDERATIONS—ONODI CELL 63
9 - FRONTAL SINUSOTOMY—DRAF I AND IIA 67
INTRODUCTION 67
ANATOMY 69
Cells of the Frontal Recess 70
Agger Nasi Cell 70
Interfrontal Sinus Septal Cell 70
Supraorbital Ethmoid Cell 70
Suprabullar Cell 70
Frontal Bullar Cell 70
Frontal Recess Cell 70
PREOPERATIVE CONSIDERATIONS 72
Radiographic Considerations 72
INSTRUMENTATION 72
PEARLS AND POTENTIAL PITFALLS 75
Pearls 75
Potential Pitfalls 76
SURGICAL PROCEDURE 77
Step 1: Identifying the Anterior Ethmoid Artery 77
Step 2: Identifying the Natural Drainage Pathway 77
Step 3: Removing the Posterior Wall of the Agger Nasi Cell 77
Step 4: “Enlarging the Box”—Remove Surrounding Bony Partitions to Widen the Frontal Recess 78
Step 5: Removing the Cap of the Agger Nasi Cell 78
Step 6: Expanding the Posterior Frontal Recess 78
Step 7: Performing the Finishing Touches 78
Step 8: Placing a Frontal Sinus Stent (Optional) 80
10 - FRONTAL SINUSOTOMY—DRAF IIB 83
INTRODUCTION 83
ANATOMY 83
Frontal Sinus 83
Anterior Fossa and Cribriform Plate 84
Middle Turbinate 84
INDICATIONS AND CONTRAINDICATIONS FOR EXTENDED FRONTAL SINUS SURGERY 84
PREOPERATIVE CONSIDERATIONS 84
Radiologic Considerations 86
INSTRUMENTATION 87
SURGICAL PROCEDURE 87
Preparation 87
Surgical Technique 87
Step 1: Anterior Ethmoid and Frontal Recess Dissection 87
Step 2: Localization of the Anterior Ethmoid Arteries 87
Step 3: Enlargement of the Frontal Sinus Ostium 88
Step 4: Partial Resection of the Anterior Middle Turbinate 88
Step 5: Initial Frontal Recess Floor Removal 88
Step 6: Further Bone Removal 88
Step 7: Cavity Optimization 89
PEARLS AND POTENTIAL PITFALLS 89
Pearls 89
Potential Pitfalls 89
POSTOPERATIVE CONSIDERATIONS 89
Complications 89
POSTOPERATIVE MANAGEMENT 90
Frontal Sinus Rescue Procedure 91
11 - FRONTAL SINUSOTOMY—DRAF III 93
ENDOSCOPIC COMMON FRONTAL SINUSOTOMY 93
Introduction 93
ANATOMY 93
INDICATIONS AND CONTRAINDICATIONS 94
Indications 94
Contraindications 94
PREOPERATIVE CONSIDERATIONS 94
INSTRUMENTATION 95
SURGICAL PROCEDURE 95
Step 1: Patient Positioning and Preparation 95
Step 2: Anterior Ethmoid Dissection and Defining the Medial Orbital Wall 95
Step 3: Exposing the Nasofrontal Beak and Defining the Posterior Limit of Dissection (the First Olfactory Neuron) 95
Step 4: Creation of the Septal Window 96
Step 5: Drilling to Define the Lateral Limits 97
Step 6: Drilling Away the Nasofrontal Beak 98
Step 7: Closure and Dressing 99
PEARLS AND PITFALLS 99
POSTOPERATIVE CARE 100
REFERENCES 100
12 - POSTOPERATIVE DÉBRIDEMENT 101
INTRODUCTION 101
ANATOMY 101
PREOPERATIVE CONSIDERATIONS 101
INSTRUMENTATION 101
PEARLS AND POTENTIAL PITFALLS 101
Pearls 101
SURGICAL PROCEDURE 102
Step 1 102
Step 2 102
Step 3 102
Step 4 102
Step 5 102
Step 6 102
Step 7 103
Step 8 103
POSTOPERATIVE CONSIDERATIONS 103
Postprocedure Epistaxis 103
Postoperative Medical Therapy 103
SPECIAL CONSIDERATIONS 104
REFERENCES 104
13 - BALLOON DILATATION OF THE MAXILLARY, FRONTAL, AND SPHENOID SINUSES 105
INTRODUCTION 105
PREOPERATIVE CONSIDERATIONS 105
INSTRUMENTATION 106
PEARLS AND POTENTIAL PITFALLS 106
SURGICAL PROCEDURES 108
Balloon-Only Procedure 108
Step 1 108
Step 2 108
Step 3 108
Step 4 108
Step 5 108
Step 6 108
Step 7 108
Step 8 108
Balloon Hybrid Procedure 110
POSTOPERATIVE CONSIDERATIONS 112
SPECIAL CONSIDERATIONS 112
3 - Revision Endoscopic Sinus Surgery: forInflammatory Disease 113
14 - Revision Functional Endoscopic Sinus Surgery: Completion Sphenoethmoidectomy 115
INTRODUCTION 115
ANATOMY 115
PREOPERATIVE CONSIDERATIONS 115
Radiographic Considerations 115
INSTRUMENTATION 116
SURGICAL PROCEDURE 116
Step 1: Debulk Polyps in the Nasal Cavity With a Microdébrider 116
Step 2: Revise the Maxillary Antrostomy 117
Step 3: Remove the Posterior Maxillary Air Scoop 117
Step 4: Skeletonize the Medial Orbital Wall 117
Step 5: Dissect the Remaining Posterior Ethmoid Air Cells Down to the Sphenoid Face 117
Step 6: Enlarge the Sphenoidotomy 117
Step 7: Skeletonize the Skull Base of Superior Ethmoid Partitions 119
Step 8: Remove the Superior Uncinate Process 119
POSTOPERATIVE CONSIDERATIONS 119
REFERENCES 121
15 - MODIFIED MEDIAL MAXILLECTOMY FOR RECALCITRANT MAXILLARY SINUSITIS 123
INTRODUCTION 123
ANATOMY 123
PREOPERATIVE CONSIDERATIONS 123
Radiographic Considerations 123
INSTRUMENTATION 125
PEARLS AND POTENTIAL PITFALLS 125
Pearls 125
Potential Pitfalls 125
SURGICAL PROCEDURE 125
Step 1: Perform a Maxillary Antrostomy With Complete Removal of the Uncinate Process 125
Step 2: Resect the Posterior Two-Thirds of the Inferior Turbinate (Fig. 15.3) 125
Step 3: Resect the Inferior Turbinate and Cauterize the Inferior Turbinate Remnant 125
Step 4: Create a Nasal Floor Mucosal Flap 125
Step 5: Identify the Location of the Anterior Cut of the Medial Maxillary Wall 126
Step 6: Create an Inferior Osteotomy 126
Step 7: Make the Anterior Osteotomy in the Medial Maxillary Wall 126
Step 8: Reflect the Wall Medially 126
Step 9: Make the Posterior Cut of the Medial Maxillary Wall 126
Step 10: Remove the Medial Maxillary Wall (With or Without the Inferior Turbinate; Fig. 15.12) 127
Step 11: Drill the Remainder of the Inferior Maxillary Ridge Flush With the Nasal Floor If Necessary 127
Step 12: Replace the Nasal Floor Mucosal Flap 127
POSTOPERATIVE CONSIDERATIONS 127
SPECIAL CONSIDERATIONS 131
REFERENCES 131
16 - EXTENDED SPHENOID SINUS ANTROSTOMY AND RADICAL SPHENOIDECTOMY 133
ANATOMY 133
PREOPERATIVE CONSIDERATIONS 134
Preoperative Radiographic Considerations 134
INSTRUMENTATION 135
PEARLS 135
POTENTIAL PITFALLS 135
SURGICAL STEPS, VARIATION 1: UNILATERAL EXTENDED SPHENOID ANTROSTOMY 135
Step 1: Identify the Natural Sphenoid Ostium 135
Step 2: Harvest a Short Pedicled Nasoseptal Flap (Figs. 16.4 and 16.5) 135
Step 3: Widely Open the Sphenoid 136
Step 4: Irrigate the Sphenoid Sinus 136
Step 5: Place the Nasoseptal Flap Across the Inferior Bony Opening of the Sphenoid Sinus (Figs. 16.6 and 16.7) 136
SURGICAL STEPS, VARIATION 2: BILATERAL EXTENDED SPHENOID ANTROSTOMY (SPHENOID “DRILL-OUT”) 136
Step 1: Raise a Single Pedicled Nasoseptal Flap 136
Step 2: Perform Bilateral Wide Sphenoid Antrostomies as Previously Described 137
Step 3: With Both Sphenoid Sinuses Opened, a Posterior Septectomy Can Be Performed 137
Step 4: Remove the Sphenoid Rostrum and Connect the Right and Left Sphenoid Openings 137
Step 5: Remove the Sphenoid Intersinus Septum (Fig. 16.9) 137
Step 6: Remove All Disease From the Sphenoid Sinus 138
Step 7: Place the Pedicled Nasoseptal Flap Across the Inferiorly Exposed Bone of the Newly Created Unisphenoid Sinus (Fig. 16.10... 138
RADICAL SPHENOIDECTOMY OR SPHENOID MARSUPIALIZATION 138
Step 1: Apply Local Anesthesia and Perform an Ethmoidectomy on the Diseased Side 138
Step 2: Identify and Ligate the Nasoseptal Artery 138
Step 3: Create a Nasopharyngeal Mucoperiosteal Flap (Figs. 16.11 and 16.12) 138
Step 4: Remove Bone of the Sphenoid Sinus Floor (Fig. 16.13) 138
Step 5: Set the Nasopharyngeal Mucoperiosteal Flap (Fig. 16.14) 138
Step 6: Repeat Aforementioned Steps on Contralateral Side If Necessary 138
POSTOPERATIVE CONSIDERATIONS 140
REFERENCES 140
4 - Orbital Surgery 141
17 - Endoscopic Dacryocystorhinostomy 143
INTRODUCTION 143
ANATOMY 143
PREOPERATIVE CONSIDERATIONS 143
Radiographic Considerations 143
INSTRUMENTATION 143
PEARLS AND POTENTIAL PITFALLS 144
SURGICAL PROCEDURE 144
Step 1: Create a Posteriorly Based Mucosal Flap to Expose the Lacrimal Bone and Frontal Process of the Maxilla 144
Step 2: Raise the Mucosal Flap 144
Step 3: Remove Overlying Bone 145
Step 4: Use a Hajek-Koffler Punch to Remove the Hard Bone of the Frontal Process of the Maxilla Overlying the Anterior-Inferior ... 145
Step 5: Expose the Agger Nasi Cell 145
Step 6: Marsupialize the Lacrimal Sac 145
Step 7: Trim the Mucosal Flap to Appose the Lacrimal Sac Mucosa 146
Step 8: Pass Crawford Silastic Tubes 146
POSTOPERATIVE CONSIDERATIONS 146
SPECIAL CONSIDERATIONS 147
Revision Surgery 147
REFERENCES 147
18 - ENDOSCOPIC ORBITAL DECOMPRESSION 149
INTRODUCTION 149
ANATOMY 149
Maxillary Sinus Landmarks 149
Ethmoid Sinus Landmarks 149
Sphenoid Sinus Landmarks 149
PREOPERATIVE CONSIDERATIONS 149
INSTRUMENTATION (FIG. 18.2) 151
PEARLS AND POTENTIAL PITFALLS 151
Pearls 151
Potential Pitfalls 151
SURGICAL PROCEDURE 151
Step 1: Resection of the Middle Turbinate, Maxillary Antrostomy, Complete Ethmoidectomy, and Sphenoidotomy 152
Step 2: Penetration of the Medial Orbital Wall 152
Step 3: Removal of Medial Orbital Wall Fragments 152
Step 4: Downfracture of the Orbital Floor 152
Step 5: Incision of the Periorbita (Fig. 18.5) 154
Step 6: Orbital Fat Prolapse Into the Ethmoid and Maxillary Cavities 155
Hemostasis 155
POSTOPERATIVE CONSIDERATIONS 155
Postoperative Care 155
Outcomes 155
SPECIAL CONSIDERATIONS 156
CONCLUSIONS 156
REFERENCES 156
19 - OPTIC NERVE DECOMPRESSION 157
INTRODUCTION 157
ANATOMY 157
Orbit and Orbital Apex 157
Optic Nerve 157
Sinus 157
INDICATIONS AND CONTRAINDICATIONS FOR OPTIC NERVE DECOMPRESSION 157
PREOPERATIVE CONSIDERATIONS 158
Radiographic Considerations 158
INSTRUMENTATION (FIG. 19.8) 159
PEARLS AND POTENTIAL PITFALLS 162
Pearls 162
Potential Pitfalls 162
SURGICAL PROCEDURE 162
Step 1: Perform a Complete Ethmoidectomy 162
Step 2: Perform a Wide Sphenoidotomy 162
Step 3: Identify the Optic Nerve, Carotid Prominence, and Opticocarotid Recess (Fig. 19.9) 162
Step 4: Fracture the Lamina in the Posterior Ethmoid 162
Step 5: Remove Bone Overlying the Intracanalicular Segment of the Nerve 162
Step 6: Consider the Need to Incise the Optic Sheath 163
Step 7: Dressings 164
COMPLICATIONS 164
Postoperative Considerations 164
20 - ENDOSCOPIC APPROACH AND REMOVAL OF ORBITAL TUMORS 165
INTRODUCTION 165
ANATOMY 165
INDICATIONS AND CONTRAINDICATIONS 165
PREOPERATIVE CONSIDERATIONS 165
INSTRUMENTATION 167
PEARLS AND POTENTIAL PITFALLS 168
Pearls 168
Potential Pitfalls 168
SURGICAL PROCEDURE 168
Step 1: Perform a Complete Ethmoidectomy, Maxillary Antrostomy, and Sphenoidectomy 168
Step 2: Fracture and Remove the Lamina Papyracea (See Fig. 20.5) 169
Step 3: Incise the Periorbita With a Sickle Knife (See Fig. 20.7) 169
Step 4: Dissect the Extraconal Fat (See Fig. 20.8) 169
Step 5: Identify the Inferior Border of the Medial Rectus Muscle and Retract It With a Double-Ball Probe (See Fig. 20.9) 169
Step 6: Identify the Oculomotor Nerve, the Inferomedial Trunk of the Ophthalmic Artery, and the Tumor 169
Step 7: Bluntly Dissect the Tumor Using a Binarial, 4-Handed Approach 169
Step 8: Gently Retract the Lesion Anteriorly in a Plane Parallel to the Optic Nerve (Fig. 20.10) 169
Step 9: Reconstruct the Orbit With a Nasoseptal Flap, If Required 169
Step 10: Nasal Packing May Be Cautiously Used 169
COMPLICATIONS 169
POSTOPERATIVE CONSIDERATIONS 169
REFERENCES 170
5 - Sinonasal Tumors 171
21 - Endoscopic Medial Maxillectomy 173
INTRODUCTION 173
ANATOMY5 173
PREOPERATIVE CONSIDERATIONS 173
INSTRUMENTATION 174
PEARLS 174
POTENTIAL PITFALLS 174
SURGICAL STEPS 176
Step 1: Debulk the Tumor or Polyps 176
Step 2: Remove the Uncinate Process and Identify the Natural Ostium 176
Step 3: Identify the Hasner Valve 176
Step 4: Perform a Subtotal Inferior Turbinectomy 177
Step 5: Create a Nasal Floor Mucosal Flap 178
Step 6: Mega-Antrostomy 178
Step 7: Adjunctive Approaches: Inferior Meatal Window, Septal Window, Canine Fossa Puncture, Anterior Maxillotomy, and the Denke... 178
Step 8: Removal of the Tumor Pedicle 181
Step 9: Ethmoid Involvement 181
Step 10: Endoscopic Dacryocystorhinostomy (When Necessary) 182
POSTOPERATIVE CONSIDERATIONS 182
REFERENCES 182
22 - ENDOSCOPIC DENKER APPROACH FOR ANTERIOR MAXILLA TUMORS 183
INTRODUCTION 183
GENERAL PRINCIPLES 183
SURGICAL TECHNIQUE 183
Step 1: Mucosal Cuts 183
Step 2: Soft Tissue Dissection Over the Maxilla 184
Step 3: Bony Cuts to the Maxilla 184
COMPARISON TO OTHER ENDOSCOPIC PROCEDURES 186
“Cross-Court”/Transseptal Approaches 186
ADVANTAGES OF THE ENDOSCOPIC DENKER APPROACH 187
COMPLICATIONS 187
SURGICAL INDICATIONS 190
CONCLUSIONS 190
REFERENCES 190
23 - ENDOSCOPIC VIDIAN NEURECTOMY 191
INTRODUCTION 191
ANATOMY 191
PREOPERATIVE CONSIDERATIONS 191
INSTRUMENTATION 191
PEARLS AND POTENTIAL PITFALLS 191
SURGICAL PROCEDURE 192
Step 1: Perform a Wide Maxillary Antrostomy 192
Step 2: Raise a Mucosal Flap and Ligate the Sphenopalatine Artery 192
Step 3: Identify the Pharyngeal Nerves and the Vidian Nerve 192
Step 4: Apply Bone Wax 192
Step 5: Replace the Mucosal Flap and Dressing 193
POSTOPERATIVE CONSIDERATIONS 193
REFERENCES 193
24 - PTERYGOPALATINE/PTERYGOMAXILLARY SPACE APPROACHES, MAXILLARY ARTERY LIGATION, AND APPROACH TO JUVENILE NASOPHARYNGEAL ANGIOFIBROMA 195
ANATOMY 195
PREOPERATIVE CONSIDERATIONS 196
Radiographic Considerations 197
INSTRUMENTATION 198
PEARLS AND POTENTIAL PITFALLS 198
SURGICAL PROCEDURE 198
Step 1: Wide Maxillary Antrostomy and Sphenoidotomy 198
Step 2: Elevation of Mucosa of the Posterior Wall of the Maxillary Sinus and Drilling 199
Step 3: Enlargement of the Window Into the PPS 200
Step 4: Incision of the Anterior Pterygopalatine Fossa Periosteum 200
Step 5: Identification of the Maxillary Artery 200
Step 6: Ligation of the Maxillary Artery 200
Step 7: Removal of the Disease Process in the PPS 200
Step 8: Access of the LSR 201
Step 9: Closure 201
APPROACH TO JUVENILE NASOPHARYNGEAL ANGIOFIBROMA 201
Introduction 201
Anatomy 202
Preoperative Considerations 203
Radiographic Considerations 203
Additional Instrumentation 203
Pearls and Potential Pitfalls 203
SURGICAL STEPS 205
Step 1: Perform a Wide Maxillary Antrostomy, Ethmoidectomy, and Sphenoidotomy 205
Step 2: Expose the Sphenopalatine and/or Maxillary Artery 205
Step 3: Perform a Sphenopalatine or Maxillary Artery Ligation 206
Step 4: Dissect the Posterior Nasopharyngeal Component Free From Surrounding Tissues 206
Step 5: Dissect the Intranasal Portions of the Tumor From the Surrounding Tissues 206
Step 6: Remove the Tumor Either Transnasally or Transorally Depending on Its Size 207
Step 7: Evaluate the Pterygoid Processes and Vidian Canal 207
Step 8: Cover the Surgical Defect 207
Postoperative Considerations 207
CONCLUSION 209
REFERENCES 209
25 - ENDOSCOPIC CRANIOFACIAL RESECTION 211
INTRODUCTION 211
ANATOMY 211
PREOPERATIVE CONSIDERATIONS 212
Workup and Staging 212
Radiographic Considerations 212
INSTRUMENTATION 213
PEARLS AND POTENTIAL PITFALLS 213
SURGICAL PROCEDURE 214
Step 1 214
Step 2 214
Step 3 214
Step 4 214
Step 5 214
Step 6 214
Step 7 214
Step 8 217
Step 9 217
Step 10 217
Step 11 217
POSTOPERATIVE CONSIDERATIONS 218
SPECIAL CONSIDERATIONS 220
REFERENCES 220
6 - Skull Base Reconstruction 221
26 - Repair of Cerebrospinal Fluid Leak and Encephalocele of the Cribriform Plate 223
INTRODUCTION 223
ANATOMY 223
PREOPERATIVE CONSIDERATIONS 224
Radiographic Considerations 224
INSTRUMENTATION 225
PEARLS AND POTENTIAL PITFALLS 225
SURGICAL PROCEDURE 225
POSTOPERATIVE CONSIDERATIONS 231
SPECIAL CONSIDERATIONS 231
REFERENCES 232
27 - SPHENOID SINUS CEREBROSPINAL FLUID LEAK AND ENCEPHALOCELE REPAIR 233
INTRODUCTION 233
ANATOMY 233
PREOPERATIVE CONSIDERATIONS 234
Patient History 234
Clinical Diagnosis 234
Intrathecal Fluorescein Administration 235
Radiographic Considerations 235
Computed Tomography 235
Magnetic Resonance Imaging 235
Adjunctive Imaging 236
INSTRUMENTATION 236
PEARLS AND POTENTIAL PITFALLS 236
Pearls 236
Potential Pitfalls 237
SURGICAL PROCEDURE 237
Step 2 237
Step 3 237
Step 4 237
Step 5 237
Step 6 238
Step 7 238
Step 8 238
Step 9 239
POSTOPERATIVE CONSIDERATIONS 239
Packing 239
Antibiotics 239
Lumbar Drain 240
Acetazolamide 240
SPECIAL CONSIDERATIONS 240
REFERENCES 241
7 - Anterior and Central Skull Base Approaches 243
28 - Endoscopic Resection of Pituitary Tumors 245
INTRODUCTION 245
ANATOMY5 245
PREOPERATIVE CONSIDERATIONS 246
Radiographic Considerations 246
INSTRUMENTATION (FIG. 28.5) 247
SURGICAL PROCEDURE 247
Step 1: Vasoconstriction 248
Step 2: Sphenoidotomy 248
Step 3: Posterior Septectomy 248
Step 4: Anterior Sphenoid Resection 250
Step 5: Removal of the Intersinus Septum 250
Step 6: Neurosurgical Resection of the Tumor 250
Step 7: Repair of Cerebrospinal Fluid Leak (If Necessary) 251
Step 8: Application of Absorbable Packing 251
POSTOPERATIVE CONSIDERATIONS 254
SPECIAL CONSIDERATIONS 254
REFERENCES 254
29 - ENDOSCOPIC TRANSPLANUM AND SELLAR APPROACH 255
INTRODUCTION 255
ANATOMY 255
PREOPERATIVE CONSIDERATIONS 256
Radiographic Considerations 257
INSTRUMENTATION (FIG. 29.7) 259
PEARLS AND POTENTIAL PITFALLS 259
Pearls 259
Potential Pitfalls 260
SURGICAL PROCEDURES 260
Step1: Nasal Exposure of the Sphenoid 260
Step 2: Sphenoidotomy 260
Step 3: Nasoseptal Flap Elevation 260
Step 4: Contralateral Working Window 261
Step 5: Completion of the Sphenoidotomy and Removal of the Sphenoid Keel 261
Step 6: Removal of the Sphenoid Inner-Sinus Septum 262
Step 7: Removal of the Sella Wall 262
Step 8: Resection of the Sella Mass 263
Transplanum Approach 263
Skull Base Reconstruction 267
POSTOPERATIVE CONSIDERATIONS 267
REFERENCES 268
30 - ENDOSCOPIC MANAGEMENT OF CLIVAL CHORDOMAS AND CHONDROSARCOMAS 269
INTRODUCTION 269
ADVANTAGES TO ENDOSCOPIC RESECTION OF CLIVAL LESIONS 269
DISADVANTAGES TO ENDOSCOPIC TRANSCLIVAL APPROACHES 269
CLIVAL CHORDOMAS: BACKGROUND 269
CLIVAL CHONDROSARCOMAS: BACKGROUND 270
ANATOMIC CONSIDERATIONS AND RELATIONSHIPS FOR THE CLIVUS 270
PREOPERATIVE CONSIDERATIONS FOR ENDOSCOPIC TRANSCLIVAL WORK 271
Radiographic Considerations for Transclival Surgery 273
INSTRUMENTATION FOR ENDONASAL TRANSCLIVAL SURGERY 273
PEARLS AND POTENTIAL PITFALLS 273
SURGICAL PROCEDURE 275
Step 1: Complete the Preoperative Setup 275
Step 2: Decongest and Provide Vasoconstriction to the Nasal Cavity 276
Step 3: Harvest a Nasoseptal Flap (Optional) 276
Step 4: Defining the Surgical Corridors to the Sphenoid Sinus and Clivus 277
Step 5: Perform Wide Bilateral Sphenoidotomies 277
Step 6: Perform a Posterior Septectomy 277
Step 7: Reduce the Floor of the Sphenoid Sinus and Begin Drilling the Superior Clivus 279
Step 8: Identify the Vertical Component of Both Internal Carotid Arteries 279
Step 9: Open the Nasopharyngeal Mucosa and Musculature to Expose the Clivus (Optional) 280
Step 10: Drill the Clivus Bone Until the Lesion Is Resected or the Clival Dura Is Exposed 280
Step 11: Incise the Dura to Expose the Posterior Fossa for Intracranial Lesions (Optional) 281
Step 12: Meticulous Decompression Versus Resection of Intradural Clival Lesions With Neurosurgery 282
Step 13: Skull Base Reconstruction of Clival Defects 282
POSTOPERATIVE CONSIDERATIONS 282
SPECIAL CONSIDERATIONS 283
REFERENCES 283
31 - LARGE SKULL BASE DEFECT RECONSTRUCTION WITH AND WITHOUT PEDICLED FLAPS 285
INTRODUCTION 285
ANATOMY 286
PREOPERATIVE CONSIDERATIONS 287
Radiographic Considerations 288
INSTRUMENTATION 289
PEARLS AND POTENTIAL PITFALLS 289
SURGICAL PROCEDURE 291
Local Flaps 291
Posterior Nasoseptal Flap 291
Step 1: Defining the Flap 291
Step 2: Raising the Flap 292
Step 3: Storing the Flap 293
Step 4: Reconstruction of Dural Defect 293
Step 5: Positioning of Intranasal Flap 294
Inferior Turbinate Flap 295
Middle Turbinate Flap 295
Palatal Floor Flap 296
Regional Flaps 296
Pericranial Flap 296
Temporoparietal Flap 296
Free Grafts 296
POSTOPERATIVE CONSIDERATIONS 297
REFERENCES 297
8 - Combined Endoscopic andOpen Approaches—FrontalSinus 299
32 - Frontal Sinus Trephination 301
INTRODUCTION 301
ANATOMY 301
PREOPERATIVE CONSIDERATIONS 302
Indications for Trephination 302
Radiographic Considerations 302
INSTRUMENTATION 303
PEARLS AND POTENTIAL PITFALLS 303
SURGICAL PROCEDURE 303
Step 1: Incision 303
Step 2: Exposure of Bone 304
Step 3: Drilling of the Trephination 304
Step 4: Placement of Drains and Closure 305
POSTOPERATIVE CONSIDERATIONS 305
CONCLUSION 305
REFERENCES 307
33 - OSTEOPLASTIC FLAPS WITH AND WITHOUT OBLITERATION 309
INTRODUCTION 309
ANATOMY 309
PREOPERATIVE CONSIDERATIONS 309
INSTRUMENTATION 310
PEARLS AND PITFALLS 310
SURGICAL PROCEDURE 311
POSTOPERATIVE CONSIDERATIONS 314
REFERENCES 316
INDEX 317
A 317
B 317
C 318
D 319
E 319
F 321
G 322
H 322
I 322
J 322
K 323
L 323
M 323
N 324
O 324
P 325
Q 326
R 326
S 326
T 328
U 328
V 328
W 328
IBC ES2