Pressures Exerted by Endobronchial Devices

Roscoe, Andrew; Kanellakos, George W.; McRae, Karen; Slinger, Peter

doi:10.1213/01.ane.0000255171.94527.c7

Cited by 39 publications

(26 citation statements)

References 8 publications

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“…Pressures exerted by the BB cuffs ranged from 39 to 194 mmHg. At intra-cuff volumes required to create a seal to 25 cmH 2 O positive pressure, the pressures exerted by the cuffs of all the devices were less than 30 mmHg [10]. In the present study we found that average cuff pressures were 39.79 ± 4 mmHg on the left side and 84.6 ± 5 mmHg on the right side, respectively.…”

Section: Discussionsupporting

confidence: 43%

“…In the present study we found that average cuff pressures were 39.79 ± 4 mmHg on the left side and 84.6 ± 5 mmHg on the right side, respectively. Taking into consideration that pressures exerted by the cuffs on the tracheal wall usually correspond to 10-20% of the cuff pressures [10], it may be estimated that in our series they correspond to 4-8 and 8.5-16 mmHg, which is far below the critical perfusion pressure of the bronchial wall (30 mmHg). The pressures exerted by the cuffs on the tracheal wall could be affected by the elasticity of cuff materials, and the relationship of the diameters between the cuff and the bronchus; thus, we need some basic research to prove our hypothesis for the EZblocker.…”

Section: Discussionmentioning

confidence: 55%

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Clinical experience with a new endobrochial blocker: the EZ-blocker

et al. 2012

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Section: Discussionsupporting

confidence: 43%

Section: Discussionmentioning

confidence: 55%

Clinical experience with a new endobrochial blocker: the EZ-blocker

et al. 2012

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“…This is much above the recommended maximal intracuff pressure of 30 cm H 2 O for endotracheal tubes. 25 However, Roscoe and colleagues 25 demonstrated that at intracuff volumes needed to create a seal to a positive pressure of 25 cm H 2 O, the transmitted pressure are less than 30 cm H 2 O. Thus, only a small fraction is transmitted to the bronchial wall.…”

Section: A Comparison Between Dlt and Ezbmentioning

confidence: 99%

Efficiency, Efficacy, and Safety of EZ-Blocker Compared with Left-sided Double-lumen Tube for One-lung Ventilation

Mourisse

Liesveld

Verhagen³

et al. 2013

Anesthesiology

124

119

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Background: Double-lumen tubes (DLTs) or bronchial blockers are commonly used for one-lung ventilation. DLTs are sometimes difficult or even impossible to introduce, and the incidence of postoperative hoarseness and airway injuries is higher. Bronchial blockers are more difficult to position and need more frequent intraoperative repositioning. The design of a Y-shaped bronchial blocker, the EZ-Blocker (Teleflex Life Sciences Ltd., Athlone, Ireland) (EZB), combines some advantages of both techniques. The objective of this study was to assess whether EZB performs clinically better than left-sided DLTs (Broncho-cath; Mallinckrodt, Athlone, Ireland) without causing more injury. Primary outcome was the frequency of initial malpositions. Methods: Eligible patients were adults scheduled for surgery requiring one-lung ventilation who met criteria for placement of both devices. In this parallel trial, 100 consecutive and blinded patients were assigned randomly using a computer-generated list to two groups. The incidence of malposition and ease and time of placement were recorded. Blinded assessors investigated quality of lung deflation, postoperative complaints, and damage to the airway.Results: Placement of a DLT was unsuccessful twice. The incidence of initial malposition was high and comparable between EZBs (37 of 50) and DLTs (42 of 49) (P = 0.212). Placing single-lumen tubes and EZBs took more time but was rated easier. Quality of lung deflation was comparable. Fewer patients in the EZB group complained of sore throat at day 1. There was a higher incidence of tracheal hematoma and redness and bronchial hematoma in the DLT group. Conclusions:The EZB is an efficient and effective device for one-lung ventilation and causes less injury and sore throat than a DLT.

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“…BB'ler yüksek volümlü -düşük basınçlı kaflara sahip olsalar da yapılan bir çalışmada kaf basınçlarının 160 mmHg'ya kadar çıktığı ancak balonun elastik geri çekilme özelliğinden dolayı bu basıncın yalnızca % 10-20 kadarının bronş mukozasına yansıdığı belirtilmiştir [26] . Bu konuyla ilgili çok fazla sayıda çalışma bulunmamaktadır.…”

Section: Bronşial Blokerlerunclassified