Technique of Functional and Motility Test: How to Perform Antroduodenal Manometry

“pulsive waves have been found more commonly in irritable bowel syndrome patients than controls.(59)”

“3 July, 2013 (395-404) been described in diabetic gastroparesis patients more than control subjects.(14) Pyloric injection of botulinum toxin A has been reported to improve patients with gastroparesis in several uncontrolled studies.”

“The contraction frequency of duodenum is between 11-12 cpm with amplitude of more than 20 mmHg during the phase III MMC.(28,41) Most of the phase III contractions begin in duodenum but it can originate in the antrum and then migrate into small intestine.”

“Several stomach and intestinal motor abnormalities have been reported in patients with unexplained upper GI symptoms and irritable bowel syndrome.(7,10,22,57,58) A decreased antral phasic pressure activity after a solid meal and unpropagated bursts of phasic and tonic contractile activity were a rela-”

“infrequent antral contraction during post-prandial period with normal amplitude or antral hypomotility have been reported.(52,53) Since the phase III MMC is essential for clearing the in-”

“This myopathic pattern can be found in patients with systemic sclerosis,(48) amyloidosis,(49) muscular dystrophy(50) and familial visceral myopathy.(50,51) However, in late stage of severe visceral myopathy patients, the”

“genesis of functional GI disorders and symptoms has not been clearly understood.(56) Several stomach and intestinal motor abnormalities have been reported in patients with unexplained upper GI symptoms and irritable bowel syndrome.”

“While acute psychological stress suppresses duodenal and jejunal phase II MMC in healthy subjects(38), vertigo and cold pain stimuli disrupt antral fed response with appearance of phase III MMC during post-prandial period.(39)”

“small intestine and colon, a decreased occurrence or absence of phase III MMC has been found to be associated with the presence of gastric bezoars and small intestinal bacterial overgrowth.(54)”

“used for sphincter pressure measurement to minimize the effect of catheter movement.(11) The advantages of water perfused catheter are that it is relatively inexpensive and widely available.”

“1 and 2).(32,34,36) During the study, simultaneous recording of GI symptoms such as nausea, vomiting, abdominal pain and the patient activities during position change and sleep are useful in correlating abnormal manometric findings to the symptoms, excluding artifact”

“pathy, the MMC is often preserved but very low amplitude contractions (< 20 mmHg) are usually found.(47) The stomach contractions can be preserved during early stage.”

“Several stomach and intestinal motor abnormalities have been reported in patients with unexplained upper GI symptoms and irritable bowel syndrome.(7,10,22,57,58) A decreased antral phasic pressure activity after a solid meal and unpropagated bursts of phasic and tonic contractile activity were a rela-”

“ferential pressure sensors spaced at 1-2 cm intervals and the data can be displayed as traditional pressure tracings or contour plots which are easily recognized.(12,13) When comparing the conventional water perfused or solid state system, this high-resolution system is able to demonstrate more details on small bowel…”

“infrequent antral contraction during post-prandial period with normal amplitude or antral hypomotility have been reported.(52,53) Since the phase III MMC is essential for clearing the in-”

“The retrograde migration of catheter especially after meal ingestion can lead to incomplete evaluation of abnormal fed response of antrum which may be associated with a number of dysmotility disorders.(24,28,29) This problem may limit the usefulness of ambulatory recording in which the location of catheter cannot be p…”

“Studies demonstrated that patients who had small intestinal pseudo-obstruction had the abnormal motility patterns which were not presented in healthy individuals(4) and were different from mechanical obstruction.(5) Moreover, among patients who had clinically suspected small intestinal pseudo-obstruction but with norm…”

“post-prandial period in healthy subjects within 30 minutes after injection.(32,34,35) These increased intestinal phase III activities have longer duration and greater propagation velocity than spon-”

“turned out to be psychiatric or other organic diseases such as Munchausen syndrome-by-proxy, celiac disease and multiple food intolerance.(6,7) The manometric abnormalities in intestinal”

“which more stomach and intestinal contraction patterns during different activities and diurnal motility changes can be revealed.(22,24) Moreover, the long recording time with multiple meal responses and monitoring at home environment may reduce the intra-individual and inter-individual variability.”

“5-1 cm at antral and pyloric part.(10) Each recording channel is connected with low compliance pneumohydraulic perfusion”

“post-prandial period in healthy subjects within 30 minutes after injection.(32,34,35) These increased intestinal phase III activities have longer duration and greater propagation velocity than spon-”

“Antroduodenal manometry catheter is usually inserted through the nose under fluoroscopy guidance without using endoscope to avoid duodenal air over-inflation may inhibit antral contraction.(19,20) However, in some difficult cases such as gastroparesis, catheter placement can be facilitated by using guidewire with endo…”

“Moreover, sleeping significantly reduces the fed pattern duration with no difference in the onset of fed pattern after meal ingestion.(40,42) Therefore, during the antroduodenal manometry study, the sleeping and waking periods should be recorded in a patient diary.”

“explained nausea, vomiting, and abdominal pain at tertiary care center.(1) Manometric findings that have no evidence of mechanical obstruction and suggestive of pseudo-obstruction with neuropathy or myopathy can avoid unnecessary surgery which resulted in a substantial positive impact on patient management.”

“Prolonged ambulatory antroduodenal manometry in healthy volunteers showed that the contraction pattern during sleeping is different from waking.(40,42) MMC dura-”

“post-prandial period in healthy subjects within 30 minutes after injection.(32,34,35) These increased intestinal phase III activities have longer duration and greater propagation velocity than spon-”

“Post-prandial motor activity was similar between day time and night time.(43) In our center, we use a caloric liquid meal (EnsureR 250 mL, 250 kcal) as a standard meal to study a fed response during antroduodenal manometry.”

“Midazolam increased the duration and contraction amplitudes of phase III migratory motor complex (MMC) in the proximal duodenum and shortened the duration of the migrating motor complex.(21) The catheter should be placed until it lay just beyond the ligament of Treitz or about 20 cm length in small intestine to adequa…”

“fect on post-prandial contraction duration, frequency and amplitude.(45,46) Therefore, the diet of higher calories or a solid meal induces more prolonged post-prandial motor activity than”

“Several stomach and intestinal motor abnormalities have been reported in patients with unexplained upper GI symptoms and irritable bowel syndrome.(7,10,22,57,58) A decreased antral phasic pressure activity after a solid meal and unpropagated bursts of phasic and tonic contractile activity were a rela-”

“nomic neuropathy or other underlying diseases which commonly are associated with GI dysmotility such as systemic sclerosis and amyloidosis.(3) In general, antroduodenal manometry provides benefit among the following groups of patients, (1) Suspected small intestinal pseudo-obstruction”

“ferential pressure sensors spaced at 1-2 cm intervals and the data can be displayed as traditional pressure tracings or contour plots which are easily recognized.(12,13) When comparing the conventional water perfused or solid state system, this high-resolution system is able to demonstrate more details on small bowel…”

“duces high amplitude antral pressure wave during the first hour.(31) In contrast, octreotide initiates small intestinal phase III activity but suppresses antral phase III activity during fasting and”

“been reported that in healthy subjects hyperglycemia (plasma glucose > 15 mmol/L) inhibits antral motility and increases duodenal MMC cycle frequency which have resulted from a significantly shorter duration of phase II MMC.(37) Stressors also have been demonstrated to affect intestinal motility.”

“The amplitude of contractions was not significantly affected by the amount of meal calories.(43,44) The other studies comparing different calories and diet composition in liquid solution demonstrated that fed pattern duration was significantly prolonged with 300 kcal liquid”

“This myopathic pattern can be found in patients with systemic sclerosis,(48) amyloidosis,(49) muscular dystrophy(50) and familial visceral myopathy.(50,51) However, in late stage of severe visceral myopathy patients, the”

“which more stomach and intestinal contraction patterns during different activities and diurnal motility changes can be revealed.(22,24) Moreover, the long recording time with multiple meal responses and monitoring at home environment may reduce the intra-individual and inter-individual variability.”

“Moreover, the long recording time with multiple meal responses and monitoring at home environment may reduce the intra-individual and inter-individual variability.(23,25) Studies comparing between ambulatory recording and stationary recording”

“Antroduodenal manometry catheter is usually inserted through the nose under fluoroscopy guidance without using endoscope to avoid duodenal air over-inflation may inhibit antral contraction.(19,20) However, in some difficult cases such as gastroparesis, catheter placement can be facilitated by using guidewire with endo…”

“revealed a higher accuracy of ambulatory recording for evaluation of inter-digestive abnormalities and also allows assessment of the relationship between symptoms that may be intermittent with motor abnormalities.(26,27) The retrograde migration of catheter especially after meal ingestion can lead to incomplete evalua…”

“This phase lasts about 3-4 minutes.(30) After phase III contractions terminate, phase I contractions, which are quiescent phase contractions, always occur and last for 40-50 minutes, followed by phase II con-”

“Moreover, the long recording time with multiple meal responses and monitoring at home environment may reduce the intra-individual and inter-individual variability.(23,25) Studies comparing between ambulatory recording and stationary recording”

“contractions, which is the characteristic of spontaneous vomiting process caused by intestinal contractions.(55) The other mechanism is retching, in which simultaneous contractions at all sensors are”

“The recent advent of solidstate high-resolution ADM catheters may address some of these difficulties in future.(29) WGS can be used to estimate SBTT and this technique has been compared to WMC in a small study of 10 subjects, in which the two procedures were concurrently undertaken.”

“Phase III-type activity in small bowel induced by octreotide is usually of longer duration and greater propagation velocity than spontaneous phase III activity [40, 47, 48] .”

“Thus, the method has only gained limited use in AD-related gastroenteropathies [76].”

“To assess the motility, an antroduodenal manometry may be done, a method that only measures motor activity of the proximal small intestine and is a rather examiner-dependent examination.(17) Many patients with abdominal pain are referred to MRE early in the disease course to exclude CD.”

“Antroduodenal manometry (ADM) allows simultaneous assessment of gastric and duodenal motility by measuring the frequency and characteristics of contraction patterns [50].”

“Techniques like antro-duodenal manometry are time consuming and have sparse availability with limitations to measure compliance of the sphincteric region although it can assess antro-duodenal peristalsis.(5) Therefore, EndoFLIP has been proposed to be a novel and complimentary assessment strategy for assessment of pyl…”

“ADM recording with a solid-state catheter has the advantage of using prolonged 24-hour protocols (16,17) In addition, prolonged ambulatory 24-hour protocol for ADM provides detailed and reliable information on antral and duodenal motor activity in fasting and fed states, and is not dependent on patient position during…”

“Assess fasting and postprandial phases [21].”

“The manometry catheter is usually placed trans-nasally with fluoroscopic guidance to avoid endoscopic air insuf-flation [75].”

“Antro-duodenal manometry (ADM) is the investigation of choice for the diagnosis of foregut dysmotility and aims to describe whether the dysmotility is due to a myopathy, neuropathy or unproven mechanical obstruction [98,100].”

“Antroduodenal or colonic manometry detects motility disorders of the upper or lower GI tract giving a very detailed profile of pressure pattern, including contraction frequency, amplitude and propagation [7].”

“Two medications, a motilin agonist and/or octreotide, are typically administered as the provocative tests to respectively stimulate antral contractions and phase III MMC in the small intestine, especially in subjects with no spontaneous phase III MMC in the fasting phase (4,5).”

“[58] It involves the placement of a solid‑state high‑resolution manometric or water‑perfused catheter into the pylorus and duodenum.”

“In other diseases, such as functional dyspepsia and upper abdominal pain, the phasic IP activities are relatively less than healthy subjects with unpropagated bursts of IP waves [11].”

“Antroduodenal manometry (ADM) is advocated as one of the most valuable diagnostic tools for assessing both antral and small bowel neuromuscular function (1,2).”

“The level of gastrointestinal peri-stalsis can be measured by fl uoroscopy (5), ultrasound examination (6,7), internal pressure measurement (8,9), gastric barostat (10), and scintigraphy (11,12), but these tests are complicated and associated with problems such as radiation exposure.”

“Advanced techniques, including antroduodenal-jejunal manometry [71–75], wireless motility capsule [76–79], gastric ultrasound [80–82], and high-resolution electrogas-trography (EGG) [83–87] may provide additional pathophysiological insight, particularly in complex or mixed-pattern cases.”

“These include procedures like antroduodenal manometry (which requires invasive catheterization [14]) as well as non-invasive techniques such as gadolinium-or manganese-contrast magnetic resonance imaging, which offer high resolution of soft tissue but are costly, time consuming, and affected by…”