Navigation Links
Anesthetic technique important to prevent damage to brain
Date:3/31/2014

Researchers at the University of Adelaide have discovered that a commonly used anesthetic technique to reduce the blood pressure of patients undergoing surgery could increase the risk of starving the brain of oxygen.

Reducing blood pressure is important in a wide range of surgeries such as sinus, shoulder, back and brain operations and is especially useful for improving visibility for surgeons, by helping to remove excess blood from the site being operated on.

There are many different techniques used to lower patients' blood pressure for surgery one of them is known as hypotensive anesthesia, which slows the arterial blood pressure by up to 40%.

Professor PJ Wormald, a sinus, head and neck surgeon from the University's Discipline of Surgery, based at the Queen Elizabeth Hospital, led a world-first study looking at both the effectiveness of hypotensive anesthesia from the surgeon's point of view and its impact on the patients.

The study followed 32 patients who underwent endoscopic sinus surgery. The results have now been published online in the journal The Laryngoscope.

"There is an important balance in anesthesia where the blood pressure is lowered so that the surgeon has good visibility and is able to perform surgery safely. There are numerous sensitive areas in sinus surgery the brain, the eye and large vessels such as the carotid. However, if the blood pressure is lowered too far this may cause damage to the brain and other organs," says Professor Wormald.

"We know from previous research that a person's brain undergoing anesthesia has lower metabolic requirements than the awake brain, and therefore it can withstand greater reductions in blood flow.

"There is also a widely accepted concept that the brain has the ability to autoregulate to adapt and maintain a constant blood flow as needed, despite a wide range of blood pressure conditions. Our studies challenge this; they show that the brain can only autoregulate up to a point, and cannot completely adapt to such low blood pressures.

"This drop in blood pressure poses a risk of starving the brain of much-needed oxygen and nutrients, which could result in injury. There have been cases, for example, where patients have reported memory loss following surgery.

"Given that hypotensive anesthesia is a widely used technique, not just in sinus surgery but in many different types of surgery, we've made recommendations in our paper that suggest a safer approach to this technique. This would reduce risk to the patient while enabling the surgeon to carry out their work effectively," Professor Wormald says.


'/>"/>

Contact: Peter-John Wormald
peterj.wormald@adelaide.edu.au
61-882-227-538
University of Adelaide
Source:Eurekalert

Related medicine news :

1. Common anesthetic agents can be harmful for the development of the fetus
2. Southlake Dermatology Offers New Pliaglis Anesthetic Cream
3. Recent Study Shows Anesthetic Combination Allows For Quicker Recovery Post Oral Surgery, Tyler Sedation Dentist, Dr. Roy Smith, Comments
4. Anesthetic Drugs Procurement Research Report Now Available from IBISWorld
5. New MRI technique may predict progress of dementias
6. Detecting malaria early to save lives: New optical technique promises rapid and accurate diagnosis
7. New technique may help severely damaged nerves regrow and restore function
8. New Techniques May Improve Infant Heart Surgery
9. New surgical technique for removing inoperable tumors of the abdomen
10. New technique predictably generates complex, wavy shapes
11. Screening for breast cancer without X-rays: Lasers and sound merge in promising diagnostic technique
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/31/2016)... ... , ... Spectrum Aquatics has launched a brand new ADA pool lift, the ... the user in mind. , “Over the last two years our key customers and ... lbs lift is a necessary requirement for certain facilities with specific needs,” said Nabil ...
(Date:5/31/2016)... ... May 31, 2016 , ... TeaZa® Energy, LLC ... pouches, on World No Tobacco Day . The new flavor—Tropical TeaZa? Energy—will ... on this summer. , The new flavor is best described as a juicy, ...
(Date:5/31/2016)... , ... May 31, 2016 , ... ... marketing services firm and statement solutions provider, for the tenth consecutive year ... May 2016 issue of Advertising Age, and SourceLink ranked eighteenth in the “U.S. ...
(Date:5/30/2016)... FL (PRWEB) , ... May 30, 2016 , ... As ... means for their children and their efforts to keep their households lice free. ... across Hawaii are enacting new policies that keep kids in the classroom despite the ...
(Date:5/30/2016)... , ... May 30, 2016 , ... Another ER facility ... in Plano, located at 3960 Legacy Drive, Plano, TX and is open 24 hours ... of Commerce followed by a medical open house. The Jasper High School band entertained ...
Breaking Medicine News(10 mins):
(Date:5/30/2016)... Eye expert s ... eye examination before leaving hospital ... Moorfields Eye Hospital Dubai, the first overseas branch of the ... identified premature babies as a special concern in the region when ... retinopathy of prematurity (ROP). ROP is a potentially blinding condition that ...
(Date:5/27/2016)... , May 27, 2016 ... innovative biopharmaceutical company focused on late-stage drug development, ... Dexcel Pharma of pivotal batches required for ... Drug Administration (FDA). This follows Kitov,s announcement ... III trial successfully met its primary efficacy endpoint. ...
(Date:5/26/2016)... , May 26, 2016 ... Associated With Both Cost Savings and Overall ... plc (LSE: BTG), an international specialist healthcare company, ... at the 21st Annual Meeting of ISPOR (International ... treatment of hepatocellular carcinoma (HCC) using yttrium-90 glass ...
Breaking Medicine Technology: