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Paper text:
several techniques have been developed to assess gastric motility and gastric emptying.1 the cutaneous electrograstrography ( egg ) represents the myoelectrical activity of the stomach , and is interpreted into imaginary gastric movement.1,2 scintigraphy using radionuclide luminescence imaging provides visual movement of the stomach , such as gastric emptying , that is rough and disconnected.3 these 2 techniques represent indirect images of gastric motility .
the current capsule endoscope goes through the gastrointestinal ( gi ) tract passively by gravity and peristalsis .
if it would be fixed or located in the stomach for some time , the capsule endoscope could monitor gastric motility continuously , not passing through lower part of the gi tract .
a magnetic capsule endoscope had been developed for the fixation in the stomach , and it was investigated to determine whether a modified magnetic capsule endoscope was feasible for monitoring real - time and continuous gastric motility inside the stomach . in this report , we described the first experience of intra - gastric monitoring of gastric motility using a magnetic capsule endoscope .
for development of a magnet capsule endoscope , 2 small permanent magnetic disks are incorporated into mirocam ( intromedic , seoul , korea ) , a capsule endoscope , using a novel communication mechanism that is not interfered by magnetic force ( fig .
a healthy volunteer swallowed the magnetic mirocam after the electrodes were attached on his abdomen surface .
the images captured by the magnetic mirocam were shown on the real - time viewer program .
the external magnet on the abdominal surface maneuvered the magnetic mirocam inside the stomach and moved it to the greater curvature of the lower body in order to observe motility around gastric angle . at the intended location ,
the external magnet was fixed on the volunteer s abdomen using an abdomen belt with 16 small magnets arranged in a regular fashion ( fig .
the transmitted images from the magnetic mirocam fixed inside the stomach showed continuous gastric peristalsis around the gastric angle ( fig . 3 and supplementary video ) .
our short successful experience suggests that the magnetic capsule endoscopy may be available to monitor gastric motility inside the stomach .
this is a pilot trial to test the possibility to monitor real - time gastric motility inside the stomach .
the gastric motility can be observed even through esophagogastroduodenoscopy when it is inserted into the stomach , but the gastric motility is not physiologic because the large amount of air is inflated into the stomach , and because the long shaft of endoscope is positioned on mouth , esophagus and stomach simultaneously and continuously .
wireless capsule endoscopy can visualize inside of the stomach without air inflation and a long shaft , and its size is so small that it minimally affects the stomach motility , as compared with esophagogastroduodenoscopy .
although this trial is so primitive that the information is only the feasibility to monitor gastric motility using a modified capsule endoscopy , this experience may help with investigation on gastric motility disorders .
the various types of magnet capsule endoscopes for the stomach have been tried to screen gastric diseases as a substitute for conventional esophagogastroduodenoscopy.57 however , in our trial , magnetic capsule endoscopy brought focus on gastric motility .
our simple trial and outcome indicate the possibility of ambulatory direct monitoring of gastric movement .
the real - time monitoring of gastric motility will help the investigation of gastric motility disorders .
the cutaneous egg is a non - invasive technique recording myoelectric activity of the stomach on the abdominal skin , and used to identify the pathophysiology of the functional gi disorders.8 however , the cutaneous egg does not measure gastric emptying nor gastric contraction,2 and it records gastric slow waves determining frequency and propagation of antral contractions .
the correlation between egg and gastric emptying remains controversial.9 also , it is difficult to reliably record and analyze the signal.9 a magnetic capsule endoscopy may supplement the cutaneous egg if two techniques would be combined by synchronizing myoelectrical activity and real - time gastric motility .
gastric - emptying scintigraphy is a standard technique to measure gastric emptying.10 it is a non - invasive and quantitative method , but the measurement is rough and disconnected.3 a magnetic capsule endoscopy may provide continuous visual gastric motility and qualitative aspects of the motility .
this report is the first step to develop the novel technique for intra - gastric monitoring of the gastric motility , although there are lots of problems to be solved : the validation should be performed ; the quantitative measurement of gastric motility for determining normal motility should be further investigated also ; and the cost - effectiveness should be evaluated . in summary , a magnetic capsule endoscopy provided real - time images of intra - gastric motility .
the combination of the cutaneous egg and a magnetic capsule endoscopy will be a novel technique to investigate gastric motility disorders .
note : to access the supplementary video mentioned in this article , visit the online version of journal of neurogastroenterology and motility at http://www.jnmjournal.org/ , and at doi : http://dx.doi.org/10.5056/jnm.2014.20.2.261 .
the magnetic capsule endoscope has been modified to be fixed inside the stomach and to monitor the gastric motility . 
 this pilot trial was designed to investigate the feasibility of the magnetic capsule endoscope for monitoring gastric motility . 
 the magnetic capsule endoscope was swallowed by the healthy volunteer and maneuvered by the external magnet on his abdomen surface inside the stomach . the magnetic capsule endoscope transmitted image of gastric peristalsis . 
 this simple trial suggested that the real - time ambulatory monitoring of gastric motility should be feasible by using the magnetic capsule endoscope .