Accidental spillage of breathing circuit condensate into airway leading to ventilator-associated pneumonia

Khan, Mohd Saif; Karnam, Hasan F.; Verma, Mansi

doi:10.1016/j.jcrc.2015.02.018

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…Respiratory circuit is a necessary equipment for mechanical ventilation of severe patients, which is used to connect the ventilator with the endotracheal tube of patients, and plays an irreplaceable role in providing oxygen, respiratory support and keeping the respiratory tract unobstructed 1 . In the process of respiratory support, the respiratory tract will produce a large number of secretions.…”

Section: Introductionmentioning

confidence: 99%

Development and Application of a New Type of Medical Protective Sputum Suction Respiratory Circuit

Wu¹,

Lu²,

Jin³

et al. 2022

Preprint

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Background: At present, there are few breathing circuits that can protect health care workers. Here, we have developed a new disposable medical protective sputum suction breathing circuit.Methods：The main components of the structure of the novel medical protective breathing circuit are adapter, isolation sleeve, stop sleeve, sealing cover and sealing ring. An isolation sleeve is inserted into the conversion joint. The isolation sleeve inner sleeve has a stop sleeve with an inverted round table structure. The upper nozzle of the adapter is provided with a sealing ring tightly combined with the lower outer edge of the isolation sleeve, and a sealing cover is provided on the sealing ring.Results: The device is easy to operate and can prevent the pollution caused by sputum splashing when sucking sputum.Conclusion: The medical protective sputum suction and breathing circuit is simple in structure, easy to use, and can effectively protect medical staff.

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Section: Introductionmentioning

confidence: 99%

Development and Application of a New Type of Medical Protective Sputum Suction Respiratory Circuit

Wu¹,

Lu²,

Jin³

et al. 2022

Preprint

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Can humidifier reservoir bacteria colonize the circuit during mechanical ventilation: An in vitro study

Jia,

Li,

Lau

et al. 2024

Nursing in Critical Care

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BackgroundAlthough the circuit condensate, an ideal bacterial reservoir during mechanical ventilation, may flow into the humidifier reservoir, no studies have investigated if humidifier reservoir colonized bacteria colonize other circuit locations with airflow.AimsWe aimed to prove whether the humidifier reservoir colonized bacteria colonize other circuit locations with airflow and provide some advice on the disposal of condensate in the clinical setting.Study DesignAn in vitro experiment was conducted. Mechanical ventilation simulators (n = 90) were divided into sterile water group (n = 30) and broth group (n = 60). In the sterile water group, sterile water was used for humidification, either Acinetobacter baumannii or Pseudomonas aeruginosa were inoculated to humidifier water in the humidifier reservoir, each accounted for 50% of the simulators. The broth group was performed the same as the sterile water group except for the addition of broth into the humidified water. After 24, 72, and 168 h of continuous ventilation, the humidifier water and different locations of the circuits were sampled for bacterial culture.ResultsAll bacterial culture results of the sterile water group were negative. Bacteria in the humidifier water continued to proliferate in the broth group. With prolonged ventilation, the bacteria at the humidifier reservoir outlet increased. The bacteria at the humidifier reservoir outlet were much more in the Pseudomonas aeruginosa subgroup than in the Acinetobacter baumannii subgroup and the difference was statistically significant (p < .05). During continuous ventilation, no bacterial growth occurred at 10 cm from the humidifier reservoir outlet and the Y‐piece of the ventilator circuits.ConclusionsSterile water in the humidifier reservoir was not conducive to bacterial growth. Even if bacteria grew in the humidifier reservoir and could reach the humidifier reservoir outlet, colonization of further circuit locations with the airflow was unlikely. During a certain mechanical ventilation time, the amount of bacteria reaching the outlet of the humidifier reservoir varied due to different mobility of bacteria.Relevance to Clinical PracticeIn a clinical setting, nurses should not worry about a small amount of condensate backflow into the humidifier reservoir. Draining condensate into the humidifier reservoir can be used as a low risk and convenient method in clinical practice.

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Accidental spillage of breathing circuit condensate into airway leading to ventilator-associated pneumonia

Cited by 2 publications

References 6 publications

Development and Application of a New Type of Medical Protective Sputum Suction Respiratory Circuit

Development and Application of a New Type of Medical Protective Sputum Suction Respiratory Circuit

Can humidifier reservoir bacteria colonize the circuit during mechanical ventilation: An in vitro study

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