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Chapter-09 Complex Forms of Benign Paroxysmal Positional Vertigo

BOOK TITLE: Understanding Benign Paroxysmal Positional Vertigo

Author
1. Dispenza Francesco
2. Stefano Alessandro De
3. Saleh Essam
4. Mohamad Alfarghal
5. Balatsouras Dimitrios G
6. Giglione Maria
7. Stagno Rosetta
8. Bianchini Sebastian
9. Scarnà Calogero Giancario
10. Maira Salvatore
11. Bennici Ettore
ISBN
9789385999055
DOI
10.5005/jp/books/12982_10
Edition
1/e
Publishing Year
2017
Pages
48
Author Affiliations
1. “San Giovanni di Dio” Hospital, “Azienda Sanitaria Locale” of Agrigento, Sicily, Italy, UOC Otorinolaringoiatria–Azienda Universitaria, Ospedaliera Policlinico ‘P Giaccone’, Palermo, Italy
2. Institute of Otolaryngology, “G.d’Annunzio” University of Chieti-Pescara, Italy; “Azienda Sanitaria Locale” of Lecce, Apulia, Italy, Lecce, Italy
3. Alexandria University, Alexandria, Egypt
4. National Guard Hospital, Jeddah, Saudi Arabia
5. Tzanion General Hospital, Piraeus, Greece
6. “San Giovanni di Dio” Hospital of Agrigento, Azienda Sanitaria Locale di Agrigento, Agrigento, Italy
7. “San Giovanni di Dio” Hospital of Agrigento, Azienda Sanitaria Locale di Agrigento, Agrigento, Italy
8. “San Giovanni di Dio” Hospital of Agrigento, Azienda Sanitaria Locale di Agrigento, Agrigento, Italy
9. “San Giovanni di Dio” Hospital of Agrigento, Azienda Sanitaria Locale di Agrigento, Agrigento, Italy
10. “San Giovanni di Dio” Hospital of Agrigento, Azienda Sanitaria Locale di Agrigento, Agrigento, Italy
11. “San Giovanni di Dio” Hospital of Agrigento, Azienda Sanitaria Locale di Agrigento, Agrigento, Italy
Chapter keywords
Benign paroxysmal positional vertigo, BPPV, otoconia, cupulolithiasis, posterior canal cupulolithiasis, lateral canal cupulolithiasis, canal switch, anterior canal BPPV, bilateral horizontal canal BPPV

Abstract

This chapter focuses on complex forms of benign paroxysmal positional vertigo (BPPV) and divided into 4 parts. The first part discusses on cupulolithiasis and cover pathogenesis, posterior canal cupulolithiasis, lateral canal cupulolithiasis and diagnosis. Otoconia, which have specific gravity greater than endolymph, adhere to the cupula of the posterior or lateral canal rendering the cupula gravity sensitive. The term cupulolithiasis was first suggested by Schuknecht who identified basophilic staining mass attached to the cupula of posterior canals in temporal bones of patients with BPPV. The second part presents a detailed description on subjective BPPV. Canal switch and re-entry phenomenon in BPPV have been discussed in the third part. The timing of maneuver performing, in particular the final verification test after therapeutic sessions, is important to prevent the immediate reflux of particles into canals. The last part of this chapter focuses on BPPV involving multiple canals.

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