The biggest thing in operating rooms these days is a million-dollar, multi-armed robot named da Vinci, used in nearly 400,000 surgeries nationwide last year - triple the number just four years earlier.
But now the high-tech helper is under scrutiny over reports of problems, including several deaths that may be linked with it and the high cost of using the robotic system.
There also have been a few disturbing, freak incidents: a robotic hand that wouldn't let go of tissue grasped during surgery and a robotic arm hitting a patient in the face as she lay on the operating table.
Is it time to curb the robot enthusiasm?
Some doctors say yes, concerned that the "wow" factor and heavy marketing have boosted use. They argue that there is not enough robust research showing that robotic surgery is at least as good or better than conventional surgeries.
Many U.S. hospitals promote robotic surgery in patient brochures, online and even on highway billboards. Their aim is partly to attract business that helps pay for the costly robot.
The da Vinci is used for operations that include removing prostates, gallbladders and wombs, repairing heart valves, shrinking stomachs and transplanting organs. Its use has increased worldwide, but the system is most popular in the United States.
"We are at the tip of the iceberg. What we thought was impossible 10 years ago is now commonplace," said Dr. Michael Stifelman, robotic surgery chief at New York University's Langone Medical Center.
For surgeons, who control the robot while sitting at a computer screen rather than standing over the patient, these operations can be less tiring. Plus robot hands don't shake. Advocates say patients sometimes have less bleeding and often are sent home sooner than with conventional laparoscopic surgeries and operations involving large incisions.
But the Food and Drug Administration is looking into a spike in reported problems during robotic surgeries. Earlier this year, the FDA began a survey of surgeons using the robotic system. The agency conducts such surveys of devices routinely, but FDA spokeswoman Synim Rivers said the reason for it now "is the increase in number of reports received" about da Vinci.
Reports filed since early last year include at least five deaths.
Whether there truly are more problems recently is uncertain. Rivers said she couldn't quantify the increase and that it may simply reflect more awareness among doctors and hospitals about the need to report problems. Doctors aren't required to report such things; device makers and hospitals are.
It could also reflect wider use. Last year there were 367,000 robot surgeries versus 114,000 in 2008, according to da Vinci's maker, Intuitive Surgical Inc. of Sunnyvale, Calif.
Da Vinci is the company's only product, and it's the only robotic system cleared for soft-tissue surgery by the FDA. There are other robotic devices approved for neurosurgery and orthopedics, among other things.
A search for the company's name in an FDA database of reported problems related to medical devices brings up 500 reports since Jan. 1, 2012. Many of those came from Intuitive Surgical. The reports include incidents that happened several years ago and some are duplicates. There's also no proof any of the problems were caused by the robot, and many didn't injure patients. Reports filed this year include:
A woman who died during a 2012 hysterectomy when the surgeon-controlled robot accidentally nicked a blood vessel.
A Chicago man who died in 2007 after spleen surgery.
A New York man whose colon was allegedly perforated during prostate surgery. Da Vinci's maker filed that report after seeing a newspaper article about it and said the doctor's office declined to provide additional information.
A robotic arm that wouldn't let go of tissue grasped during colorectal surgery on Jan. 14. "We had to do a total system shutdown to get the grasper to open its jaws," said the report filed by the hospital. The report said the patient was not injured.
A robotic arm hit a patient in the face during a hysterectomy. The company filed that report, and said it is unknown if the patient was injured but that the surgeon decided to switch to an open, more invasive operation instead.
Intuitive Surgical filed all but one of those reports.
Complications can occur with any type of surgery, and so far it's unclear if they are more common in robotic operations, but that's part of what the FDA is trying to find out.
Intuitive Surgical disputes there's been a true increase in problems and says the rise reflects a change it made last year in the way it reports problems.
The da Vinci system "has an excellent safety record with over 1.5 million surgeries performed globally, and total adverse event rates have remained low and in line with historical trends," said company spokeswoman Angela Wonson.
But an upcoming research paper suggests that problems linked with robotic surgery are underreported. They include cases with "catastrophic complications," said Dr. Martin Makary, a Johns Hopkins surgeon who co-authored the paper.
"The rapid adoption of robotic surgery ... has been done by and large without the proper evaluation," Makary said.
The da Vinci system, on the market since 2000, includes a three- or four-armed robot that surgeons operate with hand controls at a computer system located several feet away from the patient. They see inside the patient's body through a tiny video camera attached to one of the long robot arms. The other arms are tipped with tiny surgical instruments.
Robotic operations are similar to conventional laparoscopy, or "keyhole" surgery, which involves small incisions and camera-tipped instruments controlled by the surgeon's hands, not a robot.
Almost 1,400 U.S. hospitals - nearly 1 out of 4 - have at least one da Vinci system. Each one costs about $1.45 million, plus $100,000 or more a year in service agreements.
The most common robotic operations include prostate removal - about 85 percent of these operations in the U.S. are done with the robot. Da Vinci also is often used for hysterectomies, Wonson said.
Makary says there's no justification for the skyrocketing increase in robotic surgery, which he attributes to aggressive advertising by the manufacturer and hospitals seeking more patients.
He led a study published in 2011 that found 4 in 10 U.S. hospitals promoted robotic surgery on their websites, often using wording provided by the manufacturer. Some of the claims exaggerated the benefits or had misleading, unproven claims, the study said.
Click on CBS News to read more.