Pneumoperitoneum Increases Mean Expiratory Flow Rate
Conditions
Keywords
mechanical ventilation; body mass index; chest compliance; pneumoperitoneum; expiratory flow rate, intraabdominal pressure, laparoscopic surgery
Brief summary
Upon introducing pneumoperitoneum our research team noticed a reduction in expiration time displayed on the screen of the anesthesia machine. Since most respirators do not directly indicate the length of expiratory time and the average expiratory flow rate, we decided to investigate whether pneumoperitoneum really accelerates expiratory flow rate and thus shortens expiratory time.
Detailed description
Furthermore we also intended to investigate which ventilation parameters these changes can be correlated with, elucidating the factors contributing to the acceleration of expiration.. This study aims to uncover the physiological mechanisms behind alterations in respiratory dynamics during and after pneumoperitoneum, offering valuable insights that may aid in refining ventilation strategies in the context of laparoscopic procedures.
Interventions
PROCEDUREAbdominal Laparascopy
pneumoperitoneum
Sponsors
Balázs Sütő
Study design
Observational model
CASE_CONTROL
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
* elective laparoscopic abdominal surgery, healthy lung patients, age over 18 years. Obrained, written informed consent to partake in the research.
Exclusion criteria
chronic obstructive pulmonary disease, bronchial asthma, silicosis, and those with a history of previous lung surgery, patients under 18 years of age, those who had not provided consent, and pregnant individuals were excluded from the study. \-
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Pneumoperitoneum increases mean expiratory flow rate | during surgery | Elevated intraabdominal pressure leads to a decrease in respiratory compliance and an increase in peak inspiratory pressure., therefore (consequently), expiration commences with a higher pressure difference. |
| Expiration time would be shortened, resulting in a potentially higher flow rate | during surgery | We assumed (hypothesized) that the expiration time would be shortened, resulting in a potentially higher flow rate compared to pre-pneumoperitoneum conditions. Additionally, we also conducted calculations to establish correlations between respiratory parameters and the mean increment in expiratory flow rate relative to the baseline. |
Countries
Hungary
Outcome results
None listed