is·chi·al spine

[TA]

a pointed process from the posterior border of the ischium on a level with the lower border of the acetabulum; gives attachment to the coccygeus muscle and sacrospinous ligament; the pudendal nerve passes dorsal to the ischial spine, which is palpable per vagina or rectum, and thus is used as a target for the needle tip in administering a pudendal nerve block.

Synonym(s): spina ischiadica [TA], ischiadic spine, sciatic spine

Farlex Partner Medical Dictionary © Farlex 2012

is·chi·al spine

(is'kē-ăl spīn) [TA]

A pointed process from the posterior border of the ischium on a level with the lower border of the acetabulum; gives attachment to the sacrospinous ligament; the pudendal nerve passes dorsal to the ischial spine, which is palpable per vaginam or per rectum, and thus is used as a target for the needle-tip in administering a pudendal nerve block.

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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References in periodicals archive

Pain may be elicited during application of pressure on the PN at the ischial spine and palpation inferio-medially to the sciatic notch.

Pudendal nerve entrapment in an Ironman athlete: a case report

The surgery itself involves sectioning the sacrotuberous ligament into two parts to explore the proximal nerve, incising Alcock's canal, sectioning the sacrospinous ligament at the ischial spine, and then transposing the pudendal nerve.

Surgery offers relief from pudendal nerve entrapment

* We have come to realize that sutures placed medial and cephalad to the ischial spine are often passed through a portion of the coccygeus muscle-sacrospinous ligament complex.

High uterosacral vaginal vault suspension to repair enterocele and apical prolapse: you can provide good apical support without significantly distorting the vaginal axis, and passing sutures intraperitoneally can be cleaner, and simpler, than passage through retroperitoneal structures

the distance between the tubercle of piriformis muscle and the tip of the Ischial spine (AB).

Sexual dimorphism in greater sciatic notch--a morphometric study

The Gynecare Prosima Pelvic Floor Repair System (Ethicon) is the newest kit on the market, and via anterior compartment dissection to the ischial spines, it is placed up against the arcus tendineus fascia pelvis rather than anchoring into it.

Kit-Specific training is required for mesh kits: appropriate training needed for good outcome for anterior compartment prolapse surgical treatment

The next step is placement of the apical arms into the sacrospinous ligament 2 to 3 cm medial to the ischial spine to avoid neurovascular injury.

Innovations in mesh kit technology for vaginal wall prolapse

The relevant anatomy including the ischial spine, the sacrospinous ligament, the coccygeus muscle, and the lateral side wall with White's line, is identified (Fig.

Sacrospinous ligament suspension, with and without mesh

* Palpate the ischial spine, with the preoperatively packed rectum retracted medially

Pelvic surgery: transvaginal-trocar-delivered mesh is an attractive option for prolapse repair--but is it effective?

The trapezoidal plane of the anterior wall results from the ventral and more medial attachments near the pubic symphysis and the dorsal and more lateral attachments near the ischial spine. The wall is suspended on both sides to the parietal fascia overlying the levator ani muscles at the arcus tendineus fascia pelvis (ATFP).

Treating anterior vaginal wall prolapse

The synthetic mesh is grafted with four-point fixation near the ischial spine using color-coded inferior transobdurator and bilateral superior and inferior needles, which allows for minimal lateral dissection and therefore reduces blood loss.

Vaginal wall repair

The ureter lies near the anterior margin of the uterosacral ligament, with a mean distance of 4.1 [+ or -] 0.6 cm at the level of the sacrum and 2.3 [+ or -] 0.9 cm at the level of the ischial spine.(8) In I series of high uterosacral ligament suspension with site-specific endopelvic fascia defect repair, ureteral complications occurred in 11% of patients.(5) Other series have reported rates of ureteral trauma in the range of 0.7%9 tO 2.4%.(6)

How to manage the cuff at vaginal hysterectomy: the high McCall culdoplasty and its modifications can prevent apical prolapse and enterocele

For repair of an anterior vaginal prolapse (a cystocele), the two most important landmarks are the ischial spine and the junction of the inferior pubic ramus with the body of the pubic bone.

Pelvic organ prolapse repair with Prolift