Combination of a negative pressure suction device and endoscope can accurately locate the bleeding site of refractory epistaxis

To the Editor.— The current recommended therapy for patients with meconium aspiration consists of extensive suctioning of the oropharynx and nasopharynx after delivery of the head, with subsequent endotracheal intubation and deep suction with the endotracheal tube as the suction catheter. The upper airway is commonly cleared with a bulb syringe and/or a Delee suction device. With both the Delee and the currently recommended endotracheal suction methods, the physician's mouth is the source of negative pressure.

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EUS-guided fine needle tissue acquisition by using high negative pressure suction for the evaluation of solid masses: a pilot study

Gastrointestinal Endoscopy ◽

10.1016/j.gie.2005.05.014 ◽

2005 ◽

Vol 62 (5) ◽

pp. 768-774 ◽

Cited By ~ 45

Author(s):

Alberto Larghi ◽

Amy Noffsinger ◽

Charles E. Dye ◽

John Hart ◽

Irving Waxman

Keyword(s):

Pilot Study ◽

Negative Pressure ◽

Fine Needle ◽

Tissue Acquisition ◽

Pressure Suction ◽

High Negative Pressure

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Cardiac Arrest after Connecting Negative Pressure to the Subgaleal Drain during Craniotomy Closure

Case Reports in Anesthesiology ◽

10.1155/2014/146870 ◽

2014 ◽

Vol 2014 ◽

pp. 1-3 ◽

Cited By ~ 3

Author(s):

Monu Yadav ◽

Sapna A. Nikhar ◽

Dilip Kumar Kulkarni ◽

R. Gopinath

Keyword(s):

Cardiac Arrest ◽

Negative Pressure ◽

Surgical Procedure ◽

Vacuum System ◽

Suction Drain ◽

Pressure Application ◽

Neurosurgical Patients ◽

One Year ◽

Pressure Suction ◽

Subgaleal Space

A one-year-old child operated on for arachnoid cyst in right frontoparietotemporal region had sudden bradycardia followed by cardiac arrest leading to death after connecting negative pressure to the subgaleal drain during craniotomy closure. The surgical procedure was uneventful. It is a common practice to place epidural or subgaleal drains connected to a vacuum system towards the end of craniotomy to prevent accumulation of intracranial and extracranial blood. The phenomenon of bradycardia with hypotension is known to occur following negative pressure application to the epidural, epicranial, or subgaleal space after craniotomy closure. However cardiac arrest as a complication of negative pressure suction drain in neurosurgical patients is not described in the literature.

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Suction Device for Epidermal Grafting in Vitiligo: Employing a Syringe and a Manometer to Provide an Adequate Negative Pressure

Dermatologic Surgery ◽

10.1046/j.1524-4725.2000.00018.x ◽

2000 ◽

Vol 26 (7) ◽

pp. 702-704 ◽

Cited By ~ 25

Author(s):

Han-uk Kim ◽

Seok-Kweon Yun

Keyword(s):

Negative Pressure ◽

Suction Device

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Prospective randomized trial of high versus low negative pressure suction in management of chyle fistula after neck dissection for metastatic thyroid carcinoma

Head & Neck ◽

10.1002/hed.21979 ◽

2011 ◽

Vol 34 (12) ◽

pp. 1711-1715 ◽

Cited By ~ 13

Author(s):

Gaosong Wu ◽

Xiaofei Chang ◽

Yun Xia ◽

Wei Huang ◽

Wayne M. Koch

Keyword(s):

Thyroid Carcinoma ◽

Randomized Trial ◽

Neck Dissection ◽

Negative Pressure ◽

Prospective Randomized Trial ◽

Pressure Suction ◽

Chyle Fistula

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Design and Optimization of Strength type Negative Pressure Suction Force Pluck Port based on Tesla Valve

10.21203/rs.3.rs-213596/v1 ◽

2021 ◽

Author(s):

Zijie Niu ◽

XU Shengming ◽

JIANG jiangang ◽

ZHANG Jun

Keyword(s):

Negative Pressure ◽

Simulation Analysis ◽

Flow Speed ◽

Air Pressure ◽

Maximum Pressure ◽

Structure Parameters ◽

Strengthening Effect ◽

Suction Force ◽

Pressure Suction ◽

Tesla Valve

Abstract An apple pluck port based on negative pressure suction force can realize contactless apple plucking and also reduce possible damage to the apple. Accordingly, in this study, a strength type pneumatic pluck port was designed on the basis of a Tesla valve. First, a low air pressure block for mechanization of the Tesla valve structure at the intersection between the main and curved air passageway was theoretically modelled and analyzed. Then, the air pressure and the flow speed distribution were analyzed for three different types of structure parameters under various distances of the Tesla pluck port from the apple; on the basis of a fluent simulation, the maximum pressure difference at both sides of the apple was also simulated. Finally, the structure parameters under an optimal negative pressure field according to the simulation analysis were proposed, and a manufactured experimental test was conducted to compare the results with the simulation. The simulation and experimental data prove that when the included angle between the main and curved air passageway of the Tesla pluck port is lower than 45°, the low air pressure block at the intersection between the main and curved air passageway of the Tesla valve affects the flow of the pluck port and extends the length of the low air pressure block. The Tesla pluck port guarantees a flow in the pipe when the pipe port diameter is 10–15 mm larger than the apple diameter, ensuring the negative strengthening effect of the Tesla pluck port. The experiment proves that the Tesla pluck port designed in this study exhibits a better negative pressure strengthening effect than that achieved via previously existing methods, which can strengthen the plucking effect.

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Biomechanical and morphological changes of rabbit corneas under collagenase type II and negative pressure: three months follow-up observation

10.21203/rs.2.22389/v3 ◽

2020 ◽

Author(s):

Xinyan Chen ◽

Xiao Qin ◽

Mengyao Yu ◽

Haixia Zhang ◽

Lin Li

Keyword(s):

Elastic Modulus ◽

Negative Pressure ◽

Repeated Measures ◽

Morphological Changes ◽

Corneal Thickness ◽

Central Area ◽

Type Ii ◽

Short Period ◽

Significant Difference ◽

Pressure Suction

Abstract Background To investigate biomechanical and morphological changes of rabbit cornea ectasia induced by collagenase type II and negative pressure during 3 months after treatment. Method Eighteen New Zealand white rabbits were randomly and evenly arranged into three groups. The left corneas were continuously treated by negative pressure suction (NP group) with 500 mmHg for 30 min once two days, three times in total. The central area of left corneas were soaked in the collagenase type II (CII group) solution (200 μL of 3 mg/ml) for 30 min. The left corneas (CP group) were disposed as CII group firstly, then applied negative pressure suction as NP group for once after 5 days. All right corneas were treated as control eyes. Corneal morphology parameters and Ocular Response Analyzer (ORA) output parameters were collected in vivo once a week for three weeks after treatment and before execution. Histology and biomechanics were tested in vitro at the third month after treatment. Paired t-test and repeated measures analysis were used to determine if there were differences in biomechanical and morphological related parameters across time. Results In NP group, corneal thickness and diopter changed to some extent after treatment immediately, and the elastic modulus increased and relaxation degree slowed after 3 months. In CII group, corneal diopter increased, corneal central thickness (CCT) and corneal hysteresis (CH) decreased at the second week after treatment, which showed the characters of ectatic corneas. Then the degree of ectasia decreased with time. No regular changes was found on experimental corneas in CP group. Conclusions Collagenase type II results in ectatic corneas around two weeks after treatment, but the degree of ectasia decreased with time, and there was no significant difference compared with the controls after 3 months. After negative pressure suction, corneal morphology changed in a short period, and elastic modulus increased and relaxation time increased after a three months recovery, indicating that the negative pressure suction do have a certain effect on corneas.

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