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Abdominal Free Air After Surgery

Intra-abdominal Free Air on a Plain Radiograph After Surgery. Could it be a Finding That May Predict Gastrointestinal Perforation?

Status
UNKNOWN
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT01639170
Enrollment
600
Registered
2012-07-12
Start date
2011-06-30
Completion date
Unknown
Last updated
2012-07-17

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Prediction of Gastrointestinal Perforation

Keywords

Pneumoperitoneum, Free air, Surgery, Perforation, Radiograph

Brief summary

The aim of this study is to evaluate if the presence of abdominal free air on a plain chest radiograph predicts gastrointestinal perforation. We aimed to enroll all patients undergoing abdominal surgery reporting major symptoms and signs suggestive of gastrointestinal perforation (abdominal pain, leukocytosis, fever) within the third postoperative day.

Interventions

All enrolled patients underwent erect chest x-rays assessment. In all cases the diagnosis of pneumoperitoneum was based upon the plain film identification of subdiaphragmatic air on the upright posteroanterior chest radiograph. All patients were transported from their hospital rooms to the radiology department in wheelchairs and remained in an upright position for more than 10 min before the chest radiographs were obtained. In all cases upright posteroanterior was obtained with the patient standing, using 183-cm distance, 125 kVp, phototimed exposure, and radiographic film with a wide exposure latitude. The disappearance of intraabdominal free gas will be evaluated every 48h and will be defined as the loss of the

Sponsors

Federico II University
Lead SponsorOTHER

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
DIAGNOSTIC
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to 90 Years
Healthy volunteers
No

Inclusion criteria

* Abdominal surgery and major symptoms and signs suggestive of gastrointestinal perforation within the third postoperative day.

Exclusion criteria

* inability to consent to the study, age ≤18 yr, certain or probable pregnancy, inability to remain in upright position for more than 10 minutes.

Design outcomes

Primary

MeasureTime frameDescription
prediction of gastrointestinal perforationWithin 3 days from surgery• Prediction of the presence of gastrointestinal perforation by the finding of intra-abdominal free air on a chest radiograph after abdominal surgery

Secondary

MeasureTime frameDescription
time taken for the absorption of intra-abdominal free airwithin 3 days from surgeryThe evaluation of time taken for the absorption of intra-abominal free air and its correlation with age, sex, body mass index, previous surgery, operative time, type of surgery and use of peritoneal drainage tubes. The disappearance of intra-abdominal free gas was defined as the loss of the gas bubble under the domes of the hemidiaphragms on an erect chest radiograph

Countries

Italy

Contacts

Primary ContactFrancesco Milone, Prof
milone.marco@alice.it00390817463067

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026