Changes in Aortic Diameter During Laparoscopic Surgery
Summary
Various haemodynamic changes are observed during laparoscopic surgery, relating to insufflation of CO2 & patient position. Cardiac output calculations using oesophageal doppler monitoring are based on the assumption that the aortic diameter is fixed. This study aims to measure the aortic diameter at preset times during surgery using ultrasound to discover if the diameter remains the same, and hence if the assumptions made by the oesophageal monitor are reliable. Assessing the aortic diameter involves a noninvasive ultrasound measurement taken in patients electively having laparoscopic procedures at the Royal Surrey County Hospital.
Description
Purpose and design:This study aims to measure the aortic diameter at preset times during surgery using ultrasound to discover if the diameter remains the same, and hence if the assumptions made by the oesophageal monitor are reliable. Assessing the aortic diameter involves a noninvasive ultrasound measurement taken in patients electively having laparoscopic procedures at the Royal Surrey County Hospital.
Recruitment: Patients undergoing elective laparoscopic procedures at the Royal Surrey County Hospital. Recruitment done by Dr M Dickinson or Dr M Scott (COnsultant Anaesthetists). No therapeutic promises are to be made as this is purely an observational study.
Inclusion / exclusion: Patient refusal, Surgical refusal, Conversion to an open procedure.
Consent: Informed consent will be gained from each participant.
Risks, burdens and benefits: This is an observational study using a non invasive technique in patients undergoing elective surgery. There is very little in the way of risks, burdens and benefits to the patient.
Confidentiality: Caldicott principles will be adhered to.
Conflict of interest: None.
Use of tissue samples in future research: None.
Study Design
Observational Model: Cohort, Time Perspective: Prospective
Conditions
Abdominal Aortic Diameter During Laparoscopic Surgery
Location
Royal Surrey County Hospital
Guildford
Surrey
United Kingdom
GU27xx
Status
Not yet recruiting
Source
Royal Surrey County Hospital
Results (where available)
Links
- Source: http://clinicaltrials.gov/show/NCT01137500
- Information obtained from ClinicalTrials.gov on July 15, 2010
Medical and Biotech [MESH] Definitions
Aortic Aneurysm, Abdominal
An abnormal balloon- or sac-like dilatation in the wall of the ABDOMINAL AORTA which gives rise to the visceral, the parietal, and the terminal (iliac) branches below the aortic hiatus at the diaphragm.
Surgery, Computer-assisted
Surgical procedures conducted with the aid of computers. This is most frequently used in orthopedic and laparoscopic surgery for implant placement and instrument guidance. Image-guided surgery interactively combines prior CT scans or MRI images with real-time video.
Para-aortic Bodies
Small masses of chromaffin cells found near the SYMPATHETIC GANGLIA along the ABDOMINAL AORTA, beginning cranial to the superior mesenteric artery (MESENTERIC ARTERY, SUPERIOR) or renal arteries and extending to the level of the aortic bifurcation or just beyond. They are also called the organs of Zuckerkandl and sometimes called aortic bodies (not to be confused with AORTIC BODIES in the THORAX). The para-aortic bodies are the dominant source of CATECHOLAMINES in the FETUS and normally regress after BIRTH.
Abdominal Wound Closure Techniques
Methods to repair breaks in abdominal tissues caused by trauma or to close surgical incisions during abdominal surgery.
Surgical Procedures, Minimally Invasive
Procedures that avoid use of open invasive surgery in favor of closed or local surgery. These generally involve use of laparoscopic devices and remote-control manipulation of instruments with indirect observation of the surgical field through an endoscope or similar device. With the reduced trauma associated with minimally invasive surgery, long hospital stays may be reduced with increased rates of short stay or day surgery.
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