First, stones stay time
Because the ureter is a pipeline organs, the gap is small. If the stones stay for too long, the stimuli stimulation will cause a chronic inflammatory response to the surrounding tube wall.It is difficult to discharge.If it affects the time for a long time, it will cause the ureter to expand and the ureter luminal expansion.Mostly caused by renal obstructive lesions, such as stones, tumors, polyps, or ureter itself.The disease compression around the ureter can also lead to an increase in the increase in ureteral pressure.Therefore, the occurrence of the ureter with a short period of onset and the activated ureter.Do not be greedy for the treatment of large stones, and you should arrange for the treatment for safety.Each treatment of the impact wave dose should not be too much, and the upper limit of the impact is enough. The key is to completely shatter it and do not leave a long time. This is better for gravel.The effect of stones is relatively poor.
Second, stones size and ingredients
Generally speaking, ureteral stones with a maximum diameter less than or equal to 1.5 CM are better, and are the best indications for impact waves.When the stones are too large or too much, the gravel is not only poor, but also takes a long time and costs high.Similarly, the effect of crushing stones (cystine stones, etc.) is also poor.
Third, the degree of hydrophobic water accumulation
The ureteral water accumulation is severe, which means that the stones have a long stay, and the gravel effect is not good. However, if the ureter has no dilated water, the stones may be difficult to display, and the stones may be difficult to shatter due to the small gap between the surroundings.Therefore, moderate hydrocephalus will help stones positioning, and it is also beneficial to the crushing and discharge of stones.To this end, ESWL can allow patients to urinate appropriately before treatment, because when the bladder is in a state of filling, there is a mild expansion in the middle and lower paragraphs on both sides of the ureter.For the upper paragraph, you can also use the method of compression of the abdominal band to compress the ureter, so that its proximal expansion is slightly expanded.
(Editor in charge: OpenGreat)
