Human Ureteral Peristalsis. When a record is made from one ureter, alteration in rhythm, even to the extent of complete cessation of activity, may be produced by filling the other pelvis (fig. 4). RESULTS IN CHILDREN Rate of contraction. The normal renal pelvis contracted on an average of 4 per minute (range 3 to 6 per minute).
What causes ureteral peristalsis?
Ureteral peristalsis is triggered by calcium-dependent pacemaker cells in ureteral smooth muscle. With obstruction, ureteral peristalsis increases in amplitude and frequency. Peristalsis decreases with chronic obstruction and may cease entirely with concurrent infection.
How do ureteral stents affect peristalsis?
The Impact of Ureteral Stents on Peristalsis. Usually the muscle cells of the ureter contract in a coordinated fashion (peristalsis) in order to provide urinary flow from the kidney into the bladder. By inserting a stent these contractions are disrupted, eventually resulting in a loss of peristalsis.
Where does peristalsis occur in the digestive system?
Peristalsis occurs throughout your GI tract, but especially in your esophagus. When you swallow, your throat (pharynx) begins the process by pushing food and fluids down into your esophagus (food pipe), which leads to your stomach.
What does increased peristalsis mean?
Increased peristalsis means faster movement of ingesta through the gut and less absorption of fluid, both tending to diarrhea. Reduced peristalsis means a longer alimentary sojourn, greater inspissation of ingesta and a tendency to constipation. See also peristaltic, paralytic ileus.
What causes ureter peristalsis?
Ureteral peristalsis is triggered by calcium-dependent pacemaker cells in ureteral smooth muscle. With obstruction, ureteral peristalsis increases in amplitude and frequency. Peristalsis decreases with chronic obstruction and may cease entirely with concurrent infection.
Are ureters capable of peristalsis?
The ureters are capable of peristalsis like that of the gastrointestinal tract.
Does the urethra use peristalsis?
As urine passes through the ureter, it does not passively drain into the bladder but rather is propelled by waves of peristalsis.
What moves urine along by peristalsis?
The wall of the ureter consists of three layers. The outer layer, the fibrous coat, is a supporting layer of fibrous connective tissue. The middle layer, the muscular coat, consists of the inner circular and outer longitudinal smooth muscle. The main function of this layer is peristalsis: to propel the urine.
What is peristalsis and why is it important?
When certain muscles in the digestive and urinary tracts contract, it is called peristalsis. Peristalsis is a particular, wave-like kind of muscle contraction because its purpose is to move solids or liquids along within the tube-like structures of the digestive and urinary tracts.
What does peristalsis feel like?
Peristalsis is a normal function of the body. It can sometimes be felt in your belly (abdomen) as gas moves along. This abdominal X-ray shows thickening of the bowel wall and swelling (distention) caused by a blockage (obstruction) in the intestines.
What happens if there is no peristalsis?
It means that the muscles or nerve signals that trigger peristalsis have stopped working, and the food in your intestines isn't moving. Accumulating stagnant food, gas and fluids in your intestines may cause you symptoms of bloating and abdominal distension, constipation and nausea.
What is increased peristalsis?
Definition. Excessively active peristalsis (wave of contraction of the tubular organs of the gastrointestinal tract) marked by excessive rapidity of the passage of food through the stomach and intestine. [
Where does peristaltic movement occur?
peristalsis, involuntary movements of the longitudinal and circular muscles, primarily in the digestive tract but occasionally in other hollow tubes of the body, that occur in progressive wavelike contractions. Peristaltic waves occur in the esophagus, stomach, and intestines.
Urinary Tract Infections
Jack D. Sobel, Donald Kaye, in Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases (Eighth Edition), 2015
Urinary Tract Infection
Shelly Olin, Joseph W. Bartges, in August's Consultations in Feline Internal Medicine, Volume 7, 2016
Notions of Histology, Anatomy, and Physiology of the Upper Urinary Tract
Răzvan Mulţescu, ... Bogdan Geavlete, in Retrograde Ureteroscopy, 2016
Urinary Tract
Thomas G. Nyland, ... John S. Mattoon, in Small Animal Diagnostic Ultrasound (Third Edition), 2015
Kidney Stones
Anirban Bose, ... David A. Bushinsky, in Williams Textbook of Endocrinology (Thirteenth Edition), 2016
URODYNAMICS
H. Henry Lai, ... Timothy B. Boone, in Female Urology (Third Edition), 2008
Ureteropelvic Junction Obstruction
Travis W. Groth, Michael E. Mitchell, in Pediatric Surgery (Seventh Edition), 2012
How does the renal pelvis transport urine?
This transport is achieved in two ways: 1. By peristaltic activity. A urine portion is pushed ahead of a contractile wave, which almost completely obliterates the tubular lumen. 2. By a pressure gradient in an open system. These two modes of transport are shown in Fig. 1. During the first type of transport renal pelvic pressures are low (< 10 mmHg); ureteral pressures during diastole are even lower, but show a considerable local increase during contraction. The second type of transport, through a wide-open ureter, may be present during large urine flow; the pressure head in the renal pelvis is not caused by contraction of the smooth muscles of the upper urinary tract but generated by the flow of urine, and therefore reflects arterial blood pressure. When the test subject assumes an upright position, the pressure gradient along the ureter may be increased to some extent by gravity.
What type of transport is present during large urine flow?
The second type of transport, through a wide-open ureter, may be present during large urine flow; the pressure head in the renal pelvis is not caused by contraction of the smooth muscles of the upper urinary tract but generated by the flow of urine, and therefore reflects arterial blood pressure. When the test subject assumes an upright position, ...
What is the wave pattern of the ureter?
A coordinated succession of contractions and relaxations of the muscular wall of a tubular structure, such as the OESOPHAGUS, small intestine or the URETER, producing a wave-like pattern whose effect is to move the contents along.
Why is the peristaltic wave reversed?
Reverse peristaltic action may be triggered by mild digestive upsets or more serious disorders, such as an obstruction in the stomach or intestines. Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition.
What is the term for the movement of the alimentary canal?
peristalsis. the wormlike movement by which the alimentary canal or other tubular organs with both longitudinal and circular muscle fibers propel their contents, consisting of a wave of contraction passing along the tube. adj., adj peristal´tic. When food is swallowed, it passes into the esophagus.
Which muscle contraction produces waves that pass along the intestine?
peristalsis. the alternate contraction and relaxation of circular and longitudinal muscle which produces waves that pass along the intestine (and other tubular systems) of animals, moving the tube contents in one direction.
What is the term for a sequence of muscle contractions that squeeze one small section of the digestive tract?
Peristalsis. A sequence of muscle contractions that progressively squeeze one small section of the digestive tract and then the next to push food along the tract, something like pushing toothpaste out of its tube. Mentioned in: Achalasia, Colonic Irrigation, Diffuse Esophageal Spasm, Esophageal Disorders, Heartburn, Intestinal Obstructions, ...
