|Year : 2012 | Volume
| Issue : 2 | Page : 104-107
Infralabrynthine approach as a conservative management of petrositis, our clinical experience in five patients
Mohammad Saad Hasaballah, Tamer Abdel Wahab Abo El Ezz
Department of Otolaryngology, Ain Shams University, Cairo, Egypt
|Date of Submission||11-Nov-2011|
|Date of Acceptance||26-Feb-2012|
|Date of Web Publication||17-Jun-2014|
Tamer Abdel Wahab Abo El Ezz
Department of Otolaryngology, Ain Shams University, Cairo
Source of Support: None, Conflict of Interest: None
Although apical petrositis has been typically managed with aggressive surgical intervention, the advent of antibiotics facilitated the conservative management of selected cases, however some resistant cases may still need conservative surgical intervention.
To present our experience with apical petrositis successfully treated via an infralabyrithine approach with the preservation of both middle and the inner ear after failure of aggressive medical treatment.
A retrospective study done by collecting the data of five patients with Gradenigo's syndrome who underwent surgical drainage by the authors via an infralabrynthine approach. The aim of this approach was to preserve the cochleovestibular function instead of translabrynthine approach as the five patients had variable degrees of pure conductive deafness without any evidence of labrynthine affection.
All patients started showing an improvement immediately after surgery, with the disappearance of diplopia and the lateral rectus palsy being the first outcome to be noted. In our series, only one patient developed mild vertigo and vomiting that lasted for 3 days, and was treated with sedation and antiemetics.
Infralabrynthine approach is a safe and direct way to drain inflammatory exudates from petrious apex.
Keywords: Gradenigo′s, infralabrynthine, petrositis
|How to cite this article:|
Hasaballah MS, Abo El Ezz TA. Infralabrynthine approach as a conservative management of petrositis, our clinical experience in five patients. Egypt J Otolaryngol 2012;28:104-7
|How to cite this URL:|
Hasaballah MS, Abo El Ezz TA. Infralabrynthine approach as a conservative management of petrositis, our clinical experience in five patients. Egypt J Otolaryngol [serial online] 2012 [cited 2020 Jun 4];28:104-7. Available from: http://www.ejo.eg.net/text.asp?2012/28/2/104/134544
| Introduction|| |
The petrous apex represents one of the most surgically inaccessible areas of the skull base. The diagnosis and management of lesions in this area are particularly challenging 1. In 1904, Gradenigo 2 described a syndrome characterized by a triad of the sixth nerve palsy, pain in the distribution of the fifth nerve, and otitis media that came to be known as Gradenigo syndrome. Apical petrositis was a common complication of acute mastoiditis before the widespread use of antibiotics. The trigeminal ganglion and the sixth cranial nerve are separated from the bony petrous apex only by the dura mater, that's why they are vulnerable to inflammatory processes occurring within this region 3. The involvement of the sixth cranial nerve is caused by the spread of inflammation through the Dorello’s canal under the petroclinoid ligament 4. The absence of abducent palsy, however, does not automatically exclude apical petrositis from the findings 5.
The petrous apex is a pyramidal projection of bone that comprises the most medial portion of the temporal bone. The lateral base of this pyramid is defined by the inner ear, the eustachian tube, and the intratemporal carotid artery 6.
Computed tomography (CT) and MRI are useful in the diagnosis and management of Gradenigo’s syndrome 7. The interpretation of imaging studies of the petrous apex, however, is complicated by normal anatomical variations and the degree of pneumatization in this region. Although 80% of the temporal bones are pneumatized, air cells extending to the petrous apex occur in only 30% of cases 8. There are two main groups of apical cells: those around the semicircular canals and those around the cochlea. The bony labyrinth forms a natural barrier to the free drainage of mucus or pus from these cells 9.
Although the disease has been typically managed with aggressive surgical intervention, the advent of antibiotics has facilitated the conservative management of selected cases and it appears that the issue of optimal treatment of the disease is yet to be settled 10.
Here, we report five patients with apical petrositis presenting with the typical Gradenigo’s triad who were successfully treated using an infralabyrithine approach with the preservation of both the middle and the inner ear after failure of aggressive medical treatment.
| Methodology and results|| |
This is a retrospective study carried out by collecting the data of five patients with Gradenigo’s syndrome who underwent surgical drainage carried out by the authors during the period from April 2009 till April 2011. The study was carried out at Ain Shams University Hospitals following institutional review board approval; the nature of the procedure was explained to the patients and an informed consent was signed before the operation.
The study included five patients ranging in age from 19 to 55 years, two women and three men. These five patients with clinical presentations indicating Gradenigo’s syndrome presented to our clinic with a history of ear discharge and deafness together with ear pain associated with visual problems. The discharge was purulent and profuse. Gradenigo’s syndrome was initially considered; full otorhinolaryngological examination and ophthalmological examination confirmed the diagnosis of otitis media together with paralysis of lateral rectus muscle (abducent nerve palsy). This clinical diagnosis was confirmed by a high-resolution CT of their temporal bones, which showed the spread of the inflammatory process to the pneumatized petrious apex. After the failure of a short course of aggressive medical therapy for 48 h, our patients were scheduled for an emergency transmastoid infralabyrinthine approach.
The aim of this approach was to preserve the cochleovestibular function instead of the translabrynthine approach as the five patients had variable degrees of pure conductive deafness without any evidence of labrynthine deterioration of nerve function [Figure 1].
|Figure 1: Coronal and axial cuts in a 55-year-old man showing right-sided petrositis.|
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Complete mastoidectomy was performed for all patients under general anesthesia for identification, without exposure of the sigmoid sinus jugular bulb, lateral, and posterior semicircular canals and blue lining of the posterior aspect of the mastoid segment of the facial nerve. Drilling was extended inferiorly and medially following the sigmoid sinus in order to expose the jugular bulb. These structures (mastoid segment of VII, posterior semicircular canal, and jugular bulb) corresponded to the anterior, superior, and inferior margins of our triangle, where the mouth of the track led to the petrious apex. A fine boney curette was used to excentrate the air cells, creating a tract directed along the long axis of the petrious bone in the direction of the petrious apex [Figure 2] and [Figure 3].
|Figure 3: Cadaveric dissection showing the borders of the infralabrynthine approach.|
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The air cells along the tract were stuffed with purulent exudates in three of our patients. Two of the five cases showed no excaudate at all, although the patients had the same clinical picture and showed the same improvement after surgery. Repeated irrigation with normal saline with suction of the purulent discharge was performed. Following the operation, all patients received ceftriaxone 1 g/24 h for 5 successive days together with diclofenac potassium 50 ml oral tablets every 12 h for 5 days. A postoperative CT scan carried out after surgery showed the successful infralabyrinthine path to the petrous apex. The mean follow-up period was 3 months (ranging from 1 to 6 months). All patients started showing an improvement immediately after surgery, with the disappearance of diplopia and the lateral rectus palsy being the first outcome to be noted.
In our series, only one patient developed mild vertigo and vomiting that lasted for 3 days, and was treated with sedation and antiemetics. Otherwise, there were no intraoperative or postoperative complications such as facial nerve palsy or cerebrospinal fluid leak.
| Discussion|| |
The petrous apex is anatomically defined as the portion of the temporal bone lying anteromedial to the inner ear, between the sphenoid bone anteriorly and the occipital bone posteriorly, with the extreme apex terminating at the foramen lacerum. Because the petrious apex is not amenable to direct clinical inspection, imaging studies are a valuable addition to the workup of petrious apex disease. Apical petrositis has been associated with severe and life-threatening complications, such as meningitis, brain abscess, lateral sinus thrombosis, or even cavernous sinus thrombosis, unless the area has been surgically decompressed and drained. Frenckner described an approach through the superior semicircular canal. Meanwhile, Eagleton described a middle fossa approach, whereas Dearmin and Farrior described an approach between the posterior semicircular canal and the jugular bulb. These latter approaches attempted to preserve hearing 11.
The use of proper antibiotic treatment markedly changed the incidence of the disease and its dramatic course, but surgical drainage of the petrous apex was still needed in resistant cases. The technique that we adopted is much easier to perform and is applicable for all ages. Our aforementioned technique offers a safe and direct approach to the petrious apex, which maintains permanent pneumatization and drainage to the petrious apex with much less incidence of complications and an easier approach to decrease the operative time and to ensure preservation of the audio vestibular function of the targeted ear, and providing a better alternative to the older destructive approaches. However, our technique is not suitable for drainage of other petrious apex space-occupying lesions as it is not a straight approach and it is still narrow in comparison with the translabrynthine approach. The use of otoendoscopes may improve the visualization and add more advantages to the technique.
We recommend this approach as the second-line therapy in the management of apical petrositis after a trial of aggressive antibiotic and steroid therapy for no longer than 48 h.
| Conclusion|| |
The infralabrynthine approach is a safe and direct way to drain inflammatory exudates from the petrious apex but cannot provide an alternative approach to the translabrynthine one to exenterate a mass lesion in this area.
In our series, pertositis secondary to otitis media could be safely and effectively managed by draining the petrious apex using an infralabrynthine approach with preservation of the middle and inner ear function.
The symptoms gradually disappear starting with the diplopia, which usually improves on the same day as the surgery.
| References|| |
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[Figure 1], [Figure 2], [Figure 3]