Die Rhinoresistometrie — Eine Weiterentwicklung der Rhinomanometrie

Mlynski, G.; Löw, Johannes

doi:10.1007/978-3-642-84996-1_164

Cited by 5 publications

(6 citation statements)

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“…Rhinoresistometry is a further development of active anterior rhinomanometry. Using the rhinomanometrically measured pressure and flow values, complex software calculates functionally important parameters 12 :…”

Section: Methodsmentioning

confidence: 99%

“…10,11 Using rhinoresistometry, we are able to measure the turbulence behavior in the nose. 12 The transition from laminar to turbulent flow occurs mainly in the anterior cavum, i.e., in the zone between nasal isthmus and the head of the middle turbinate, which acts as a diffuser. 10,11,13 The occurrence of turbulence depends on the increase in cross-sectional area in this region and on the flow velocity.…”

Section: Introductionmentioning

confidence: 99%

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Investigating the Nasal Cycle Using Endoscopy, Rhinoresistometry, and Acoustic Rhinometry

et al. 2003

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigating the Nasal Cycle Using Endoscopy, Rhinoresistometry, and Acoustic Rhinometry

et al. 2003

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“…With use of special software, the following parameters could be calculated [8] : (a) airfl ow resistance (R), dependent on fl ow; (b) turbulence grade, dependent on fl ow; (c) hydraulic diameter (dh), as a measure for nasal width, and (d) friction coeffi cient ( ) as a characteristic value for the wall confi guration triggering turbulence.…”

Section: Rhinoresistometry (Rrm)mentioning

confidence: 99%

First Findings Concerning Airflow in Noses with Septal Deviation and Compensatory Turbinate Hypertrophy – A Model Study

Grützenmacher¹,

Robinson

Gräfe³

et al. 2006

ORL

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Background: The nasal septal deviation is a common cause of nasal obstruction. On the other hand, many septal deviations are asymptomatic. It seems a physiological adaptation occurs on both sides. Septal deviation leads to internal nasal asymmetry, which in turn causes compensatory change in turbinate morphology (e.g. turbinate hypertrophy respectively hypotrophy). This mechanism is investigated with the help of fluid dynamic experiments and functional rhinologic diagnostics. Methods: Functional models of the nose (modified Mink’s boxes) were used and assessment was made by acoustic rhinometry and rhinoresistometry, followed by flow dynamic investigations. Septal deviations of varying position, together with turbinates of differing grades of hypertrophy, were simulated and assessed. Results and Conclusions: We observed in models of septal deviation an increase in flow resistance on the ipsilateral side as a result of friction of flow particles in the narrowing. Furthermore, on the opposite side of the deviation, the enlargement of the stream channel did not generally lead to a reduction in flow resistance, but rather to a ‘dead space’, where only a slow-circling eddy was observed. This eddy causes an increase in turbulence. In vivo turbinate hypertrophy occurs to fill this dead space, thereby reducing turbulent flow without a significant increase in resistance. In cases of moderate septal deviation, compensatory mechanisms of the turbinates can lead to a normalization of nasal airflow and surgical therapy would not be indicated. Deviations in the anterior part of the septum seem to be more symptomatic, because the mechanism is missing and due to the physiological narrowing of the nasal isthmus. To differ between physiologic and pathologic deviation, functional diagnostics are needed.

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“…RRM [4] is an objective measurement method. Analogous to RMM, it measures pressure difference and flow during respiration.…”

Section: Methodsmentioning

confidence: 99%

The Combination of Acoustic Rhinometry, Rhinoresistometry and Flow Simulation in Noses before and after Turbinate Surgery: A Model Study

Grützenmacher¹,

Lang²,

Mlynski³

2003

ORL

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Background: Especially to young examiners, the interpretation of rhinometric findings seems to be difficult. In order to understand rhinometric assessments precisely, knowledge of airflow behavior in the nose is necessary. We therefore investigated the influence of nasal concha surgery on acoustic rhinometry and rhinoresistometry in a model. Method: Six nose models were examined with acoustic rhinometry and rhinoresistometry, each of these models with its lateral wall altered to represent various conditions after nasal concha surgery. Besides, all models were rinsed with water and the flow was visualized for observation. Results and Conclusions: The normal nose presented an even flow distribution over the entire nasal cavity. After nasal concha resection, though, an unfavorable flow course and a strong increase in turbulence were seen. Additionally, flow resistance decreased considerably. In the model with general lateral wall hyperplasia, reduction of the inferior and even of the middle nasal concha showed good functional results. The model revealed a good correlation between the result of flow observation and findings in acoustic rhinometry and rhinoresistometry. Both methods complement one another in their diagnostic outcome.

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Die Rhinoresistometrie — Eine Weiterentwicklung der Rhinomanometrie

Cited by 5 publications

References 0 publications

Investigating the Nasal Cycle Using Endoscopy, Rhinoresistometry, and Acoustic Rhinometry

Investigating the Nasal Cycle Using Endoscopy, Rhinoresistometry, and Acoustic Rhinometry

First Findings Concerning Airflow in Noses with Septal Deviation and Compensatory Turbinate Hypertrophy – A Model Study

The Combination of Acoustic Rhinometry, Rhinoresistometry and Flow Simulation in Noses before and after Turbinate Surgery: A Model Study

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