New device for intraoperative blood suction avoiding turbulences

Friedrich, Martin; Bougioukas, Ioannes; Wenig, Peter; Vormfelde, Steffen; Tirilomis, Theodor

doi:10.1136/bmjinnov-2017-000201

Cited by 4 publications

(4 citation statements)

References 31 publications

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“…Budde et al have shown that avoiding turbulence (audible as a noise) reduces blood cell damage [52]. The technical solution for this is the Turbulence Controlled Suction System developed by Friedrich et al [53]. Further studies have to show the impact of suction cup geometry in this relation.…”

Section: Discussionmentioning

confidence: 99%

“…Our working group has shown that it is possible to reduce flow-induced noise and air admixture using a polypragmatic approach. The Turbulence Controlled Suction System (TCSS) adjusts the rotational speed of the roller pump system via a vibration sensor in the suction handle [53]. We can assume that the combination of TCSS and optimized suction head geometry should further reduce the noise level.…”

Section: Discussionmentioning

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%

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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“…Alat hisap dapat digunakan untuk menghisap darah maupun udara pada paru paru dengan menggunakan sistem rol yang terbuat dari sensor piezoelektrik. Sensor ini membantu meminimalkan pencampuran udara dan darah karena memiliki kecepatan motor yang stabil [2].…”

Section: Pendahuluanunclassified

Rancang Bangun Water Seal Drainage (WSD) Khusus Thorax

Ningtias¹,

Wahyudi²,

Firdaus

2020

J. Teori Apl. Fis.

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A Water Seal Drainage (WSD) design was made to remove air and fluid from the pleural cavity in the thorax (lung cavity) using a connecting tube or chest tube to maintain the negative pressure of the cavity. Under normal circumstances, the pleural cavity has negative pressure and only a little pleural fluid is filled. Suction pumps have a high pressure with a pressure range of -10 kPa to -80 kPa. The pressure is large enough so that it is not suitable for thorax because it can cause damage to internal organs due to high pressure. WSD specifically for thorax has a low pressure which is below -5 kPa / -40 mmHg. This WSD is equipped with a hand switch, water level and automatic Arduino Uno based exhaust system which has a pressure below -26.6 kPa / -20 cmHg to suction and pressure below -3.4 kPa / -2.6 cmHg to remove liquid from the bottle . The hand switch itself functions as a manual control to make it easier for the user, while the level sensor functions as a safety level for fluid levels in the tool and also an automatic fluid disposal system so that it is more efficient.

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“…The turbulence-controlled suction system (TCSS) significantly reduces turbulence, is pressure-limited and reduces the proportion of pumped air. 15 The roller pump-based TCSS is a modified suction setup with acoustic-based turbulence detection at the tip of the handgrip. When turbulence is detected, the control setup reduces the speed of the roller pump automatically for minimization of suction pressure and turbulence.…”

Section: Introductionmentioning

confidence: 99%