《千金方》云∶尺寸之法，根据古者八寸为尺，仍取病者男左女右手中指上第一节为一寸
。亦
有长短不定者，即取手大拇指第一节横度为一寸，以意消息，巧拙在人。《外台方》亦同上
法。又一云∶三寸者，尽一中指也。《圣惠方》云∶今取男左女右手中指第二节，内度两横
纹相去为一寸。自根据此法，疗病多愈。今以此为定穴取寸，石藏用亦用《圣惠方》为准。以
蜡纸条子或薄篾，量患人男左女右手中指中节横纹上下相去长短为一寸，谓之同身寸(若曲
指节旁取指侧中节上下两交角相去远近为一寸。若伸指即正取中指自上节下横纹至中节中，
从
上第二条横纹长者相去远近为一寸。当曲指一寸长短，亦相符合。然人之身手指，或有异者
。至于指纹亦各不同，更在此意详度之也。)此折纸篾与同身寸相等为六寸，逐寸以墨界之
，勿令长短，有所出入不同，截断收之，俟以此量灸穴。自脊中第四 下停，分两旁各三寸
为膏肓 ，足太阳膀胱经脉气之所发也。
\r蜡纸样\p06-d16a1.bmp\r
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\r手厥阴经图\p06-d16a3.bmp\r
\r手太阴经图\p06-d16a4.bmp\r
\r屈指量寸法图\p06-d16a5.bmp\r
\r伸指量寸法图\p06-d16a6.bmp\r
《千金方》记载：尺寸测量的方法，依据古法以八寸为一尺，同时取患者男性左手或女性右手的中间手指（中指）上第一节长度作为一寸。也有手指长短不一的情况，此时可取手大拇指第一节的横向宽度作为一寸，具体运用需根据情况灵活斟酌，技巧高低在于医者个人。《外台秘要》也采用同样的方法。另一种说法是：三寸的长度，等于一个中指的总长。《太平圣惠方》记载：现在取男性左手或女性右手的中指第二节，内侧两条横纹之间的距离作为一寸。自从依据此法，治疗疾病大多痊愈。现在将其作为定穴取寸的标准，石藏用也以《太平圣惠方》为准。用蜡纸条或薄竹片，测量患病者男性左手或女性右手的中指中节横纹上下之间的距离长短作为一寸，这称为同身寸（如果弯曲手指侧面取指侧中节上下两个交角之间的距离作为一寸；如果伸直手指，则正取中指从上节下横纹至中节中间，以上第二条横纹较长者之间的距离作为一寸。当弯曲手指时的一寸长短，也与上述方法相符合。然而人的身体手指，有的存在差异。至于指纹也各不相同，更需在此处仔细衡量判断。）将折好的纸篾与同身寸相等定为六寸，逐寸用墨线标记，不要使长短有所出入不同，截断后收好，等待以此测量灸穴。从脊中第四椎骨下停处，分两旁各三寸为膏肓穴，这是足太阳膀胱经经脉气机所发出的部位。
The *Qianjin Fang* (Essential Prescriptions Worth a Thousand Gold) states: The method of measuring cun is based on the ancient standard where eight cun constitute one chi. It also specifies taking the first segment of the middle finger (Zhongzhi, 3rd digit) of the male's left hand or the female's right hand as one cun. In cases where finger lengths vary, the transverse width of the first segment of the thumb may be taken as one cun; application requires flexible judgment, with proficiency depending on the practitioner. The *Waitai Miyao* (Secret Essentials of the Outer Cabinet) adopts the same method. Another view holds that three cun equals the total length of one middle finger. The *Taiping Shenghui Fang* (Holy惠民 Formulas of the Taiping Era) states: Currently, the distance between the two inner transverse creases of the second segment of the middle finger of the male's left hand or the female's right hand is taken as one cun. Since adopting this method, many illnesses have been cured. This is now established as the standard for locating acupoints and measuring cun; Shi Zangyong also uses the *Taiping Shenghui Fang* as the benchmark. Using a strip of wax paper or thin bamboo splint, measure the distance between the upper and lower transverse creases of the middle segment of the middle finger of the patient's male left hand or female right hand as one cun; this is called "Tongshen Cun" (Body-Proportion Cun) (If measuring along the side of the bent finger, the distance between the two intersection angles of the upper and lower parts of the middle segment is taken as one cun; if the finger is extended, measure from the lower transverse crease of the proximal phalanx to the center of the middle phalanx, taking the distance between the longer of the two transverse creases as one cun. The measurement of one cun when the finger is bent corresponds to this. However, fingers may vary among individuals, and fingerprints differ; careful consideration is required in these details.) Fold the paper splint to equal six Tongshen Cun, mark each cun with ink, ensuring no variation in length, cut it off, and store it for measuring moxa points. Starting from the depression below the fourth thoracic vertebra at the midline of the spine, measure three cun laterally on each side to locate the Gaohuang (BL43) acupoint, which is where the Qi of the Foot-Taiyang Bladder Meridian emerges.