The utility model discloses a single concentric circular double J tube, which relates to the field of medical devices. It comprises a polyurethane tube with two openings at both ends. The two ends of the polyurethane tube are bent into large elastic rings and small elastic rings on the opposite extension line of the same plane, respectively, and the tubes extending along the outer side of the small elastic rings are twisted from outside to inside to form several concentric spiral blocking rings of the same plane. When the pipe is wound to the center of the barrier ring, it extends along an arc from the lower part of the barrier ring to the opposite side of the plane of the small elastic ring until the large elastic ring is connected. Several concentric circle spiral blocking rings are attached to each other; the plane of the blocking ring is perpendicular to the plane of the small elastic ring. The utility model can solve the problem that the stones in the transurethral ureteroscopic lithotripsy operation fail to move into the pelvis, or the instruments that block the stones from moving up occupy the space of the lower ureter, hinder the operation of entering the ureteroscope and the difficulty of breaking out the stones, and it is difficult to achieve satisfactory results.
【技术实现步骤摘要】
单头同心圆状双J管
本技术涉及医疗器械
,尤其是一种用于输尿管、肾结石腔镜碎石手术治时阻挡结石移位的内置单头同心圆状双J管。
技术介绍
随着输尿管肾镜技术的进步和钬激光在泌尿外科的应用,经尿道输尿管镜钬激光碎石治疗各种输尿管、肾结石已经成为常规的泌尿外科结石手术。这种手术具有无创伤,效果确切,费用低廉,易于普及应用等特点而为泌尿外科医生及患者所接受。但这种手术结石易于向肾盂及肾盏内移位而使结石碎石率下降,特别是输尿管中段及上段结石,当碎石操作后结石松动,冲洗液灌注时易使结石向上移位进入肾盂及各盏内而无法窥见,此时碎石成功率少于50%。目前有人通过改变体位使结石沉积固定于最低位置易于碎石,但效果不佳;还有经尿道插入带膨胀气囊的导管在结石上方充盈气囊阻挡结石上移,或者带线的网篮越过结石上方网住防止术中结石上移等方法,这些方法不但操作繁杂,气囊破裂阻挡失败,还因上述管材占据输尿管下段空间而致管腔变细,导致术中插入输尿管肾镜困难,特别是输尿管上段结石时;阻挡碎石冲出膀胱内,而且材料价贵。还有以单头锥状螺旋双J管挂在结石上方和膀胱之间,以阻挡术中结石上移,但也存在J管 ...
【技术保护点】
1.一种单头同心圆状双J管,包括两端开口的中空的聚氨酯导管,所述聚氨酯导管两个端头分别弯曲有一大一小的小弹性圈和大弹性圈,所述小弹性圈和所述大弹性圈在同一平面的对侧端,其特征在于:在所述小弹性圈和所述大弹性圈之间紧挨所述小弹性圈连接有阻挡圈,所述阻挡圈为所述小弹性圈外侧顺延的导管段从外向内绕曲形成数个同平面的同心圆螺旋状挡圈,所述导管段绕至最后一个所述螺旋状挡圈的中心时以顺弧形从所述螺旋状挡圈下方向所述小弹性圈平面对侧的延长线延伸连接到所述大弹性圈;数个所述螺旋状挡圈的圈与圈之间相贴;所述螺旋状挡圈的平面与所述小弹性圈和所述大弹性圈的平面垂直;当所述聚氨酯导管管腔中插入相应 ...
【技术特征摘要】
1.一种单头同心圆状双J管,包括两端开口的中空的聚氨酯导管,所述聚氨酯导管两个端头分别弯曲有一大一小的小弹性圈和大弹性圈,所述小弹性圈和所述大弹性圈在同一平面的对侧端,其特征在于:在所述小弹性圈和所述大弹性圈之间紧挨所述小弹性圈连接有阻挡圈,所述阻挡圈为所述小弹性圈外侧顺延的导管段从外向内绕曲形成数个同平面的同心圆螺旋状挡圈,所述导管段绕至最后一个所述螺旋状挡圈的中心时以顺弧形从所述螺旋状挡圈下方向所述小弹性圈平面对侧的延长线延伸连接到所述大弹性圈;数个所述螺旋状挡圈的圈与圈之间相贴;所述螺旋状挡圈的平面与所述小弹性圈和所述大弹性圈的平面垂直...
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