The Cost in Oxygen of Surgical Trauma

NCT ID: NCT02238561

Last Updated: 2015-10-30

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

40 participants

Study Classification

OBSERVATIONAL

Study Start Date

2014-11-30

Study Completion Date

2015-08-31

Brief Summary

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The investigators will examine the relationship between post-operative oxygen consumption (using non-invasive measurement technology ) and complications in patients having contemporary major abdominal surgery. The investigators hypothesis is that major surgery may trigger a physiological stress response that results in an increase in post-operative metabolic demand and oxygen consumption (V̇O2) which must be met by an increased oxygen delivery (DO2).

1. To determine the feasibility of non-invasive measurement of oxygen consumption (V̇O2) using indirect calorimetry in a cohort of patients
2. To determine the feasibility of non-invasive measurement of oxygen delivery (DO2) in the same cohort using non-invasive measures of cardiac output, oxygen saturation and haemoglobin (pulse wave transit time and co-oximetry techniques)

Detailed Description

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Prospective observational study of non-invasive measurements of V̇O2 and DO2 pre-operatively and at 8 time points in the 48 hours postoperatively in a cohort of 40 patients undergoing elective major abdominal surgery (both open and laparoscopic) with a pre-operative cardiopulmonary exercise testing (CPET).

As pilot work examining the relationship between post-operative oxygen consumption and complications in patients having contemporary major abdominal surgery , the investigators need to define and grade the severity of complications. The Post-Operative Morbidity Survey (POMS) is a simple outcome scale designed to record the incidence of clinically important complications - specifically complications likely to keep a patient in hospital. A POMS score performed on Day 5 is likely to be discriminative between patients who are recovering well, and those who are developing complications. POMS is easily performed, has good internal validity and is predictive of a prolonged length of stay. POMS is not a simple additive scale; however patients with POMS score of 1 or greater are highly likely to remain in hospital, whereas those with a score of 0 are likely to be able to go home.

Conditions

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Oxygen Consumption (V̇O2) Oxygen Delivery (DO2) Post-operative Complications

Keywords

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non-invasive measurement of oxygen consumption delivery post-operative complications

Study Design

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Observational Model Type

COHORT

Study Time Perspective

PROSPECTIVE

Study Groups

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Elective major abdominal surgery

Patients undergoing elective major open or laparoscopic abdominal surgery at Plymouth Hospitals National Health Service (NHS) Trust (PHNT)

No interventions assigned to this group

Eligibility Criteria

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Inclusion Criteria

* Male and female patients aged 18 or over.
* Undergoing elective major open or laparoscopic abdominal surgery.

Exclusion Criteria

* Refusal to participate
* Requirement for post-operative ventilation
* Requirement of inspired oxygen concentrations (FiO2) \> 28% to maintain oxygen saturations ≥ 90%.
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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University Hospital Plymouth NHS Trust

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Adam Kimble, BSc(Hons), MSc, MBBS, MRCS

Role: PRINCIPAL_INVESTIGATOR

University Hospital Plymouth NHS Trust

Locations

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Plymouth Hospitals NHS Trust

Plymouth, Devon, United Kingdom

Site Status

Countries

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United Kingdom

Other Identifiers

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14/P/123

Identifier Type: -

Identifier Source: org_study_id