SP9

Spleen Channel

Yin Mound Spring

阴陵泉Yīn Líng Quán

Anatomical location

In the depression inferior to the medial condyle of the tibia, at the level of the upper border of the tibial tuberosity.

Main function

Strengthens the Spleen, eliminates Dampness, promotes diuresis.

  • He-Sea point (Water)

Therapeutic indications

  • Edema
  • dysuria
  • diarrhea
  • knee pain
  • jaundice
  • Urinary retention
  • Incontinence
  • Abdominal distension
  • Knee pain
  • Leukorrhea
  • Genital pain
  • Heaviness of the body
  • Ascites
  • Diabetes mellitus (Xiao Ke)
  • Obesity and overweight
  • Hyperlipidemia (high cholesterol and triglycerides)
  • Hyperuricemia and gout
  • Kidney stones and renal colic
  • Venous insufficiency and varicose veins
  • Prostatitis and benign prostatic hyperplasia
  • Polycystic ovary syndrome
  • Knee osteoarthritis

Name and classical tradition

Yinlingquan (阴陵泉) is the “spring of the Yin mound,” and its original name was even more explicit. The Lingshu (Spiritual Pivot), in the Ben Shu (本輸) chapter, calls it 陰之陵泉, “the spring of the mound of the Yin,” with the particle 之 that was later lost: “入於陰之陵泉,陰之陵泉,輔骨之下,陷者之中也,伸而得之,為合”. Qi enters Yinzhilingquan, below the supporting bone, in the depression; it is found with the leg extended; it is the He-Sea point.

The name is an anatomical description. 阴 is the inner, Yin side of the knee; 陵, the mound, the relief of the medial condyle of the tibia; 泉, the spring that wells up in the depression beneath it. The Ben Shu text itself, with its “陷者之中”, in the middle of the depression, confirms the image. As the He-Sea point of a Yin channel, it corresponds to Water.

On the outer side of the knee, the Gallbladder channel has its exact counterpart, GB34, Yanglingquan, the “spring of the Yang mound,” beneath the head of the fibula. The Ben Shu calls that point 陽之陵泉, and the symmetry between the two names is complete.

Location of point SP9, Yin Mound Spring
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View point on the 3D modelSP9 on the anatomy
Needling techniquePerpendicular insertion 0.5-1.5 cun.
Depth0.5-1.5 cun
MoxibustionApplicable (5-15 minutes, indirect moxa)

Patterns that use it · 14

Classical combinations · 2

  • Dry Dampness in the Middle JiaoHe-Sea point of the Spleen with that of the Stomach and the Luo-Connecting point that dissolves Phlegm.
  • Painful kneeEyes of the knee and perimeter points with the Influential (Hui) point of the tendons.

Basic formulas from the vademecum · 1

View the vademecum

Named functional sets from the school: here the point does not act on its own, but through the role it plays within the maneuver.

  • Unblock the Lower EnergizerPregnancyLifts the stagnation of the lower abdomen: SP6 crosses the three Yin channels of the leg, SP9 drains Dampness as the He-Sea point of the Spleen, CV9 separates the clear from the turbid, and BL63, the Xi-Cleft point of the Bladder, unblocks everything at once.
Cover of the guide “Protocols for the 20 most common patterns”

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Protocols for the 20 patterns you see most in practice

Each pattern with its tongue, its pulse, the treatment principle and the points to tonify and disperse. Made for the treatment table, not the bookshelf.

Do you use SP9 with your patients?

In the Clinic you record it in the patient's file, next to the tongue, the pulse and the measurements, so at the next session you know exactly what you used. The Atlas is built in.

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