Saugerlautstärke bei Gehörgangsreinigung

Hansen, S. E.; Stupp, A.; Schwarze, Sieglinde; Schipper, Jörg

doi:10.1055/s-0031-1295464

Cited by 5 publications

(3 citation statements)

References 2 publications

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“…Flow stoppages and turbulence lead to audible vibrations. The sound pollution of suctioning increases up to 120 dB(A) (100 cm) [4, 5, 7, 12], sound levels in suction devices peaked with smaller diameter (2 mm) between 4 and 6 kHz, with wider diameter (4 mm) around 3 kHz [13], although the diameter was positively correlated with sound energy [3], all perceived as noise. Noise is defined as “unwanted or undesirable sound” as well as “wrong sound in wrong place at wrong time” [14] for it may cause annoyance and decrease in work efficiency.…”

Section: Discussionmentioning

confidence: 99%

“…The closer the noise to the hearing organ itself is, the opposite effect is to be considered (increase of the sound pressure by 6 dB at half the distance). Suction noise near the inner ear (>100 dB(A), [3], especially in children during ear and neurosurgical procedures, has been described to result in lasting hearing loss [39]. However, tracheal suctioning in children (4–10 kHz, peak 96 dB) has not lead to measurable restrictions in hearing capacity/capability (24).…”

Section: Discussionmentioning

confidence: 99%

“…To prevent this, several rows of supplementary holes were introduced in commercially available suction tubes. The fact that this leads to massive noise increases, however, has been accepted up to now, although it is well known that forced suction at the liquid-air boundary results in a massive increase of noise emissions with levels up to 120 dB(A) [3–7]. Loud noise is a significant stressor in the operation theatre (OT) [4].…”

Section: Introductionmentioning

confidence: 99%

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Modifications of Surgical Suction Tip Geometry for Flow Optimisation: Influence on Suction-Induced Noise Pollution

Friedrich

Tirilomis

Kollmeier

et al. 2018

Surgery Research and Practice

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Introduction Suction devices for clearing the surgical field are among the most commonly used tools of every surgeon because a better view of the surgical field is essential. Forced suction may produce disturbingly loud noise, which acts as a nonnegligible stressor. Especially, in emergency situations with heavy bleeding, this loud noise has been described as an impeding factor in the medical decision-making process. In addition, there are reports of inner ear damage in patients due to suction noises during operations in the head area. These problems have not been solved yet. The purpose of this study was to analyse flow-dependent suction noise effects of different surgical suction tips. Furthermore, we developed design improvements to these devices. Methods We compared five different geometries of suction tips using an in vitro standardised setup. Two commercially available standard suction tips were compared to three adapted new devices regarding their flow-dependent (10–2000 mL/min) noise emission (dB, weighting filter (A), distance 10 cm) and acoustic quality of resulting noises (Hamilton fast Fourier analysis) during active suction at the liquid-air boundary. Noise maps at different flow rates were created for all five suction devices, and the proportion of extracted air was measured. The geometries of the three custom-made suction tips (new models 1, 2, and 3) were designed considering the insights after determining the key characteristics of the two standard suction models. Results The geometry of a suction device tip has significant impact on its noise emission. For the standard models, the frequency spectrum at higher flow rates significantly changes to high-frequency noise patterns (>3 kHz). A number of small side holes designed to prevent tissue adhesion lead to increased levels of high-frequency noise. Due to modifications of the tip geometry in our new models, we are able to achieve a highly significant reduction of noise level at low flow rates (new model 2 vs. standard models p < 0.001) and also the acoustic quality improved. Additionally, we attain a highly significant reduction of secondary air intake (new model 2 vs. the other models p < 0.001). Conclusion Improving flow-relevant features of the geometry of suction heads is a suitable way to reduce noise emissions. Optimized suction tips are significantly quieter. This may help us to reduce noise-induced hearing damage in patients as well as stress of medical staff during surgery and should lead to quieter operation theatres overall. Furthermore, the turbulence reduction and reduced secondary air intake during the suction process are expected to result in protective effects on the collected blood and thus could improve the quality of autologous blood retransfusions. We are on the way to evaluate potential benefits.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modifications of Surgical Suction Tip Geometry for Flow Optimisation: Influence on Suction-Induced Noise Pollution

Friedrich

Tirilomis

Kollmeier

et al. 2018

Surgery Research and Practice

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Sound levels with aural suctioning: Effects of suction size, canal moisture, and distance from the eardrum

Young

Reeve

Yang

et al. 2020

Laryngoscope Investig Oto

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Objective To determine sound levels resulting from aural suctioning of the external auditory canal. Methods Unweighted decibels (dB) and A‐weighted decibels (dBA) sound pressure level measurements were recorded using a retrotympanic microphone in cadaveric human temporal bones. Sound measurements were made with common otologic suctions, size 3, 5, and 7 French, within the external ear canal at the tympanic membrane, 5, and 10 mm from the tympanic membrane in the dry condition. In the wet condition, the ear canal was filled with fluid and completely suctioned clear to determine sound effects of suctioning liquid from the ear canal. Results Sound levels generated from ear canal suctioning ranged from 68.3 to 97 dB and 62.6 to 95.1 dBA. Otologic suctions positioned closer to the tympanic membrane resulted in louder sound levels, but was not statistically significant (P > .05). Using larger diameter suctions generated louder dB and dBA sound levels (P < .001) and the addition of liquid in the ear canal during the suction process generated louder dB and dBA sound levels (P < .001). Conclusions Smaller caliber suction sizes and nonsuctioning techniques should be utilized for in‐office aural toilet to reduce noise trauma and patient discomfort. Level of evidence 5

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Innenohrerkrankung durch Lärm

Michel

2023

Gutachten in Der HNO

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Saugerlautstärke bei Gehörgangsreinigung

Abstract: This study demonstrates objective and reproducible data for suction-generated noise levels and could help to evaluate patients' complaints.

Cited by 5 publications

References 2 publications

Modifications of Surgical Suction Tip Geometry for Flow Optimisation: Influence on Suction-Induced Noise Pollution

Modifications of Surgical Suction Tip Geometry for Flow Optimisation: Influence on Suction-Induced Noise Pollution

Sound levels with aural suctioning: Effects of suction size, canal moisture, and distance from the eardrum

Innenohrerkrankung durch Lärm

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