The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform

Holger Rambold - One of the best experts on this subject based on the ideXlab platform.

  • SHORT REPORT Persistence of Perilymph Fistula mechanism in a completely paretic posterior semicircular canal
    2016
    Co-Authors: Christoph Helmchen, E. Gehrking, S. Gottschalk, Holger Rambold
    Abstract:

    The three dimensional eye movements (search coil technique) of a patient with a completely paretic left posterior semicircular canal as a result of a Perilymph Fistula (PLF) were studied. The patient still exhibited pressure induced nystagmus that obeyed Ewald’s first law. This finding cannot be explained by otolith stimulation, but might indicate that PLF mechanisms either persist in canal plugging or act on the ampulla by directly deflecting the cupula. P erilymph Fistulas (PLFs) are pathological connections between the Perilymphatic space of the labyrinth and the middle ear (outer Fistula) or the cerebrospinal fluid (inner Fistula). These abnormal connections transmit pres-sure to excite the affected semicircular canal, which clinically leads to paroxysmal vertigo of short duration. PLF nystagmus enables the validity of Ewald’s first law to be investigated,1 2 which helps the clinician to differentiate between a periph-eral and a central vestibular lesion. This law states that the axis of the elicited nystagmus should reflect the anatomical orientation of the canal that generates it. However, previous PLF studies have not focused on the relation between canal function and the mechanism that elicits PLF nystagmus. Specifically, how much canal and otolith function is required to still elicit PLF nystagmus? We report on the three dimensional eye movements of an exceptional patient who suffered from a PLF of the left posterior canal. This is the first report showing that PLF nystagmus of the posterior canal can still be elicited in a completely paretic canal. This finding indicates that PLF might also act directly on the cupula, without using endolymphatic flow in the semicircular canal

  • Persistence of Perilymph Fistula mechanism in a completely paretic posterior semicircular canal
    Journal of Neurology Neurosurgery & Psychiatry, 2005
    Co-Authors: Christoph Helmchen, E. Gehrking, S. Gottschalk, Holger Rambold
    Abstract:

    The three dimensional eye movements (search coil technique) of a patient with a completely paretic left posterior semicircular canal as a result of a Perilymph Fistula (PLF) were studied. The patient still exhibited pressure induced nystagmus that obeyed Ewald's first law. This finding cannot be explained by otolith stimulation, but might indicate that PLF mechanisms either persist in canal plugging or act on the ampulla by directly deflecting the cupula.

Won-ho Chung - One of the best experts on this subject based on the ideXlab platform.

  • Diagnostic criteria of barotraumatic Perilymph Fistula based on clinical manifestations.
    Acta Oto-laryngologica, 2016
    Co-Authors: Ji-eun Choi, Il Joon Moon, Won-ho Chung
    Abstract:

    AbstractConclusions: Patients with sudden hearing loss and dizziness after barotrauma should be suspected of barotraumatic Perilymph Fistula (PLF). Early surgical repair of PLF showed better hearing outcomes. Therefore, diagnostic criteria should help surgical indications of barotraumatic PLF.Objectives: The aim of this study was to establish diagnostic criteria for barotraumatic PLF.Methods: Twenty-four patients (26 ears) underwent surgery on suspicion of barotraumatic PLF. The causes of barotrauma and clinical symptoms were analyzed by surgical findings. Diagnostic criteria of PLF were proposed according to its clinical manifestations.Results: Definite PLF (17 subjects) was confirmed by any evidence of Perilymph leak through oval and round windows. For the other seven subjects (probable PLF), even though there was no evidence of Perilymph leak, their clinical manifestations were similar to definite PLF. High frequency hearing loss occurred as an early symptom after barotrauma. Positional dizziness occur...

  • Effects of early surgical exploration in suspected barotraumatic Perilymph Fistulas.
    Clinical and experimental otorhinolaryngology, 2012
    Co-Authors: Ga Young Park, Il Joon Moon, Hayoung Byun, Sung Hwa Hong, Yang Sun Cho, Won-ho Chung
    Abstract:

    Objectives Treatment of traumatic Perilymph Fistula (PLF) remains controversial between surgical repair and conservative therapy. The aim of this study is to analyze the outcomes of early surgical exploration in suspected barotraumatic PLF.

  • images in clinical medicine Perilymph Fistula test
    The New England Journal of Medicine, 2012
    Co-Authors: Hosuk Chu, Won-ho Chung
    Abstract:

    A 42-year-old man presented with severe nausea and vertigo, which were precipitated by the application of pressure just anterior to the left external auditory canal. Otoscopic examination revealed a cholesteatoma arising from the pars flaccida of the left tympanic membrane.

  • Effects of Early Surgical Exploration in Suspected Barotraumatic Perilymph Fistulas
    'Korean Society of Otorhinolaryngology-Head and Neck Surgery', 2012
    Co-Authors: Ga Young Park, Il Joon Moon, Hayoung Byun, Sung Hwa Hong, Yang Sun Cho, Won-ho Chung
    Abstract:

    ObjectivesTreatment of traumatic Perilymph Fistula (PLF) remains controversial between surgical repair and conservative therapy. The aim of this study is to analyze the outcomes of early surgical exploration in suspected barotraumatic PLF.MethodsNine patients (10 cases) who developed sudden sensorineural hearing loss and dizziness following barotrauma and underwent surgical exploration with the clinical impression of PLF were enrolled. Types of antecedent trauma, operative findings, control of dizziness after surgery, postoperative hearing outcomes, and relations to the time interval between traumatic event and surgery were assessed retrospectively.ResultsAll patients had sudden or progressive hearing loss and dizziness following trauma. Types of barotrauma were classified by the origin of the trauma: 4 external (car accident, slap injury) and 6 internal traumas (lifting, nasal blowing, straining). Surgical exploration was performed whenever PLF was suspected with the time interval of 2 to 47 days after the trauma. The possible evidence of PLF was found during surgery in 9 cases: a fibrous web around the oval window (n=3), fluid collection in the round window (RW; n=6) and bulging of the RW pseudomembrane (n=1). In every patient, vestibular symptoms disappeared immediately after surgery. The hearing was improved with a mean gain of 27.0±14.9 dB. When the surgical exploration was performed as early as less than 10 days after the trauma, serviceable hearing (≤40 dB) was obtained in 4 out of 7 cases (57.1%).ConclusionSudden or progressive sensorineural hearing loss accompanied by dizziness following barotrauma should prompt consideration of PLF. Early surgical exploration is recommended to improve hearing and vestibular symptoms

Christoph Helmchen - One of the best experts on this subject based on the ideXlab platform.

  • SHORT REPORT Persistence of Perilymph Fistula mechanism in a completely paretic posterior semicircular canal
    2016
    Co-Authors: Christoph Helmchen, E. Gehrking, S. Gottschalk, Holger Rambold
    Abstract:

    The three dimensional eye movements (search coil technique) of a patient with a completely paretic left posterior semicircular canal as a result of a Perilymph Fistula (PLF) were studied. The patient still exhibited pressure induced nystagmus that obeyed Ewald’s first law. This finding cannot be explained by otolith stimulation, but might indicate that PLF mechanisms either persist in canal plugging or act on the ampulla by directly deflecting the cupula. P erilymph Fistulas (PLFs) are pathological connections between the Perilymphatic space of the labyrinth and the middle ear (outer Fistula) or the cerebrospinal fluid (inner Fistula). These abnormal connections transmit pres-sure to excite the affected semicircular canal, which clinically leads to paroxysmal vertigo of short duration. PLF nystagmus enables the validity of Ewald’s first law to be investigated,1 2 which helps the clinician to differentiate between a periph-eral and a central vestibular lesion. This law states that the axis of the elicited nystagmus should reflect the anatomical orientation of the canal that generates it. However, previous PLF studies have not focused on the relation between canal function and the mechanism that elicits PLF nystagmus. Specifically, how much canal and otolith function is required to still elicit PLF nystagmus? We report on the three dimensional eye movements of an exceptional patient who suffered from a PLF of the left posterior canal. This is the first report showing that PLF nystagmus of the posterior canal can still be elicited in a completely paretic canal. This finding indicates that PLF might also act directly on the cupula, without using endolymphatic flow in the semicircular canal

  • Persistence of Perilymph Fistula mechanism in a completely paretic posterior semicircular canal
    Journal of Neurology Neurosurgery & Psychiatry, 2005
    Co-Authors: Christoph Helmchen, E. Gehrking, S. Gottschalk, Holger Rambold
    Abstract:

    The three dimensional eye movements (search coil technique) of a patient with a completely paretic left posterior semicircular canal as a result of a Perilymph Fistula (PLF) were studied. The patient still exhibited pressure induced nystagmus that obeyed Ewald's first law. This finding cannot be explained by otolith stimulation, but might indicate that PLF mechanisms either persist in canal plugging or act on the ampulla by directly deflecting the cupula.

E. Gehrking - One of the best experts on this subject based on the ideXlab platform.

  • SHORT REPORT Persistence of Perilymph Fistula mechanism in a completely paretic posterior semicircular canal
    2016
    Co-Authors: Christoph Helmchen, E. Gehrking, S. Gottschalk, Holger Rambold
    Abstract:

    The three dimensional eye movements (search coil technique) of a patient with a completely paretic left posterior semicircular canal as a result of a Perilymph Fistula (PLF) were studied. The patient still exhibited pressure induced nystagmus that obeyed Ewald’s first law. This finding cannot be explained by otolith stimulation, but might indicate that PLF mechanisms either persist in canal plugging or act on the ampulla by directly deflecting the cupula. P erilymph Fistulas (PLFs) are pathological connections between the Perilymphatic space of the labyrinth and the middle ear (outer Fistula) or the cerebrospinal fluid (inner Fistula). These abnormal connections transmit pres-sure to excite the affected semicircular canal, which clinically leads to paroxysmal vertigo of short duration. PLF nystagmus enables the validity of Ewald’s first law to be investigated,1 2 which helps the clinician to differentiate between a periph-eral and a central vestibular lesion. This law states that the axis of the elicited nystagmus should reflect the anatomical orientation of the canal that generates it. However, previous PLF studies have not focused on the relation between canal function and the mechanism that elicits PLF nystagmus. Specifically, how much canal and otolith function is required to still elicit PLF nystagmus? We report on the three dimensional eye movements of an exceptional patient who suffered from a PLF of the left posterior canal. This is the first report showing that PLF nystagmus of the posterior canal can still be elicited in a completely paretic canal. This finding indicates that PLF might also act directly on the cupula, without using endolymphatic flow in the semicircular canal

  • Persistence of Perilymph Fistula mechanism in a completely paretic posterior semicircular canal
    Journal of Neurology Neurosurgery & Psychiatry, 2005
    Co-Authors: Christoph Helmchen, E. Gehrking, S. Gottschalk, Holger Rambold
    Abstract:

    The three dimensional eye movements (search coil technique) of a patient with a completely paretic left posterior semicircular canal as a result of a Perilymph Fistula (PLF) were studied. The patient still exhibited pressure induced nystagmus that obeyed Ewald's first law. This finding cannot be explained by otolith stimulation, but might indicate that PLF mechanisms either persist in canal plugging or act on the ampulla by directly deflecting the cupula.

S. Gottschalk - One of the best experts on this subject based on the ideXlab platform.

  • SHORT REPORT Persistence of Perilymph Fistula mechanism in a completely paretic posterior semicircular canal
    2016
    Co-Authors: Christoph Helmchen, E. Gehrking, S. Gottschalk, Holger Rambold
    Abstract:

    The three dimensional eye movements (search coil technique) of a patient with a completely paretic left posterior semicircular canal as a result of a Perilymph Fistula (PLF) were studied. The patient still exhibited pressure induced nystagmus that obeyed Ewald’s first law. This finding cannot be explained by otolith stimulation, but might indicate that PLF mechanisms either persist in canal plugging or act on the ampulla by directly deflecting the cupula. P erilymph Fistulas (PLFs) are pathological connections between the Perilymphatic space of the labyrinth and the middle ear (outer Fistula) or the cerebrospinal fluid (inner Fistula). These abnormal connections transmit pres-sure to excite the affected semicircular canal, which clinically leads to paroxysmal vertigo of short duration. PLF nystagmus enables the validity of Ewald’s first law to be investigated,1 2 which helps the clinician to differentiate between a periph-eral and a central vestibular lesion. This law states that the axis of the elicited nystagmus should reflect the anatomical orientation of the canal that generates it. However, previous PLF studies have not focused on the relation between canal function and the mechanism that elicits PLF nystagmus. Specifically, how much canal and otolith function is required to still elicit PLF nystagmus? We report on the three dimensional eye movements of an exceptional patient who suffered from a PLF of the left posterior canal. This is the first report showing that PLF nystagmus of the posterior canal can still be elicited in a completely paretic canal. This finding indicates that PLF might also act directly on the cupula, without using endolymphatic flow in the semicircular canal

  • Persistence of Perilymph Fistula mechanism in a completely paretic posterior semicircular canal
    Journal of Neurology Neurosurgery & Psychiatry, 2005
    Co-Authors: Christoph Helmchen, E. Gehrking, S. Gottschalk, Holger Rambold
    Abstract:

    The three dimensional eye movements (search coil technique) of a patient with a completely paretic left posterior semicircular canal as a result of a Perilymph Fistula (PLF) were studied. The patient still exhibited pressure induced nystagmus that obeyed Ewald's first law. This finding cannot be explained by otolith stimulation, but might indicate that PLF mechanisms either persist in canal plugging or act on the ampulla by directly deflecting the cupula.