Obese patients who need to have their appendixes removed fare better after a minimally invasive surgical procedure rather than an open operation, according to a new study published in the July issue of the Journal of the American College of Surgeons.
While the traditional open operation (appendectomy) and minimally invasive procedure (laparoscopic appendectomy) are known to have similar outcomes for people of normal weight, surgeons at the University of Southern California's Keck School of Medicine found that obese patients had fewer complications 30 days after a minimally invasive laparoscopic operation, in which surgeons make one to three small incisions in the abdomen and remove the appendix through one of the small openings. The obese patients had longer hospital stays and higher rates of infectious complications if they underwent the open procedure, whereby a surgeon removes the appendix through a 2-to-4-inch incision in the right side of the abdomen.
"There are early studies that suggest the laparoscopic approach may be less risky in obese patients, but there's not much recent information available to strongly prove it," said lead study author Rodney J. Mason, MBBCh, FACS, associate professor of surgery at Keck School of Medicine. Appendectomies are among the most common types of operations in the United States.1 Meanwhile, more than 35 percent of U.S. adults and 17 percent of youth are obese, according to the U.S. Centers for Disease Control and Prevention.2 "We expect to see more and more obese people with medical conditions that require general surgical intervention" Dr. Mason said. "We need to know what approach works best for these patients."
Dr. Mason and colleagues did two analyses in the American College of Surgeons National Surgical Quality Improvement Program (ACS NSQIP®) database of patients who had appendectomy procedures between 2005 and 2009. Approximately 13,330 patients in the database were considered obese, based on a body mass index (BMI) of 30 or higher.
In the first analysis, Mason and his team of surgeons compared how all the obese patients in the database fared after having either an open or laparoscopic appendectomy. Results showed that patients who had the open procedure were significantly more likely to have complications, including wound infections, pneumonia, heart attacks, and septic shock. For example, 8 percent of the open appendectomy patients had non-wound related complications like heart attacks, compared with 4 percent of laparoscopy patients. Additionally, open appendectomy patients stayed in the hospital a mean of 2.3 days longer than patients who had the laparoscopic appendectomy. Overall, the laparoscopic procedure was associated with a 57 percent reduction in morbidity compared with the open procedure in obese patients.
The second analysis matched 1,114 of the laparoscopic appendectomy patients with an open operation patient group who had the same demographics and comorbid conditions. Results again showed that complications were more likely for patients who had open appendectomies. They spent more than a day longer in the hospital, and their procedures took longer than the time required for patients who had the laparoscopic procedure, which was associated with a 53 percent reduction in the risk of morbidity. Also, the more patients weighed, the worse their outcomes were with open procedures. In contrast, all the patients who underwent the laparoscopic procedure had similar outcomes, regardless of how obese they were.
Despite the noted improved outcomes for the laparoscopic surgical approach in patients with complicated appendicitis, over 40 percent of these patients in the database had undergone an open operation. With national expenditures already estimated at about $147 billion for obesity-related conditions,3 the study's results have implications for health care costs, particularly at hospitals that say open procedures cost less because they do not require the expensive equipment needed for laparoscopy.
"We've shown a shorter length of stay. There's the cost savings right there," Dr. Mason said. "Also if you can prevent a patient's wound infection, which stops him or her from having to come see the doctor four times after a procedure, reducing that complication will reduce costs. And if someone doesn't get pneumonia after an operation, that result will be cost-effective as well."
Dr. Mason noted that because laparoscopic appendectomy is still relatively new, especially for obese patients, some surgeons and hospitals default to the tried-and-true open procedure. But that approach is changing. "It depends on the surgeons' training and whether they were trained to perform laparoscopy or not," he explained. "Many surgeons are more inclined to perform laparoscopic procedures because that's how they were trained."
Moreover, the move toward laparoscopic appendectomy is to some extent patient driven, Dr. Mason pointed out. "Most of my patients seem to prefer laparoscopic operations nowadays" he concluded.
About the American College of Surgeons
The American College of Surgeons is a scientific and educational organization of surgeons that was founded in 1913 to raise the standards of surgical practice and improve the care of the surgical patient. The College is dedicated to the ethical and competent practice of surgery. Its achievements have significantly influenced the course of scientific surgery in America and have established it as an important advocate for all surgical patients. The College has more than 78,000 members and is the largest organization of surgeons in the world. For more information, visit www.facs.org(.)
1 Owings MF, Kozak LJ. "Ambulatory and in-patient procedures in the United States, 1996." In: Vital and Health Statistics, Series 13, No. 139 [DHHS publication no. (PHS) 99-1710.] Hyattsville, MD: National Center for Health Statistics, 1998:26
2 Ogden, CL, et al. "Prevalence of Obesity in the United States, 2009-2010." NCHS Data Brief 82: Jan. 2012: http://www.cdc.gov/nchs/data/databriefs/db82.pdf
3 Finkelstein, EA, et al. "Annual medical spending attributable to obesity: Payer- and service-specific estimates." Health Affairs 28(5): w822-w831; Sept-Oct. 2009.CONTACT:
Cory Suzan Petty | EurekAlert!
Study suggests possible new target for treating and preventing Alzheimer's
02.12.2016 | Oregon Health & Science University
The first analysis of Ewing's sarcoma methyloma opens doors to new treatments
01.12.2016 | IDIBELL-Bellvitge Biomedical Research Institute
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water
In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...
The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.
Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
02.12.2016 | Medical Engineering
02.12.2016 | Agricultural and Forestry Science
02.12.2016 | Physics and Astronomy