Release date: 2014-03-05
When a doctor installs a pacemaker for a patient, it is common to first cut the patient's heart, then place the components that control the heartbeat into the cavity dug out of the heart, and finally connect the pulse generator to the wire that is accessed through the vein at the clavicle. connect them. This type of surgery may soon be no longer necessary. Instead, a small wireless pacemaker is introduced into the heart from the main thigh vein. On December 9, Austrian doctors implanted such miniature pacemakers for patients, the first human trial of such pacemakers. According to manufacturer Medtronic, this is the world's smallest pacemaker. It is 24mm long and has a volume of 0.75 cm3, which is only 1/10 of the size of a traditional pacemaker. Earlier this year, St. Jude Medical bought another startup, Nanostim, which manufactures miniature cardiac pacemakers. The pacemaker produced by Nanostim is 41mm long and 25px3. These two new instruments are the latest in surgical minimally invasive techniques. The doctor sends the pacemaker to the vein in the patient's thigh, and then manipulates the catheter j to push it toward the heart. In the late 1990s, catheter-operated balloon vascular access began to replace bypass surgery. Since then, the medical community has widely used minimally invasive cardiac treatment programs. Other instruments necessary for cardiac surgery, such as stents used to dilate stenotic arteries, and prosthetic valves recently developed for patients with their own valvular lesions, can be traversed through the catheter in large blood vessels of the body and delivered to designated position. Brian Lindman, a cardiovascular specialist at the University of Washington School of Medicine, and colleagues found that valve-based minimally invasive techniques for valve repair are safer for high-risk elderly patients, and that patients who are otherwise unable to undergo surgery can be treated properly. . A recent study by Lindman showed that the catheter approach can also increase the chances of survival for people with diabetes. On the other hand, for cardiac surgical treatments such as repairing the valve, traumatic surgery can make the repair more effective, which may be a better choice for a strong patient. “No matter which surgery or minimally invasive catheter is used, no choice is always better than the other,†Lindman said. “The final choice depends on the condition of the heart and the nuances of the different protocols.†Miniature cardiac pacemaker It has been used in human trials, and St Jude's products have also been approved for clinical use in Europe. According to the manufacturer, the battery of the pacemaker can be kept at full load for 8 to 10 years. The new pacemaker is located inside the heart and eliminates the need to wrap long electrodes around the heart. The Medtronic pacemaker is fixed on the heart tissue by "small claws", and the electrodes in contact with the heart send electrical pulse signals. This new design reduces the power consumed by the device and eliminates some of the potential risks of device failure. For patients with arrhythmia or difficult patients who are difficult to diagnose, Medtronic has developed a miniaturized heart monitor. In the past, heart monitoring required continuous tracking of cardiac activity, possibly for a few days at a time. The patient must hang the portable monitoring device around his neck during this time. In the future, doctors can use a syringe-like device to implant a new monitor into a small 8mm deep wound in the heart. Cardiac activity data can be transmitted wirelessly to a bedside monitor or even to a smartphone.
Source: Cloud Health Information
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