平按∶此篇自篇首至末，见《灵枢》卷四第十七《脉度》篇，又见《甲乙经》卷二第三《脉
度》篇。
黄帝问曰∶愿闻脉度。（先言骨度及肠胃度大小长短于前，次当根据□以论诸脉长短，故须问
之也。平按∶注根据下原缺一字，谨拟作次。）岐伯曰∶手足之六阳，从手至头五尺，（手阳明，大
肠脉也。手太阳，小肠脉。手少阳，三焦脉也。三脉分在两手，故有六脉，余仿此。各根据营行次第，
手之三阴，足之三阳，皆从内起，向于手足；手之三阳，足之三阴，皆从外起，向于头□。此数手
足之脉长短，故皆从手足向内数之，与手□□□脉十二经流注入身数亦同也。平按∶手足之六阳
《灵枢》、《甲乙》均无足字，疑衍。注向于头下原缺一字，左方剩月旁，根据经文足之三
阴从足走腹，拟作腹，袁刻作项，恐未安。与手下原缺三字，谨拟作足外起三字。）五六三丈。
（计手六阳从指端至目，循骨度直行，得有五尺，不取循绕并下入缺盆属肠胃者，循骨度为数，
去其覆回行者及与支别，故有三丈也。）手之六阴，从手至胸中三尺五寸，三六丈八尺，五六三
尺，（手太阴，肺脉也。手少阴，心脉也。手心主，心包络脉也。手之三阴，皆亦直循骨度，从
手至胸三尺五寸，不取下入属脏络腑之者，少阴从心系上系目系及支别者亦不取。）凡二丈一尺。
足之六阳，从足至顶八尺，六八四丈八尺。（足阳明，胃脉也。足太阳，膀胱脉也。足少阳。胆
脉也。计人骨度，从地至顶七尺五寸，所谓八尺者何？以其足六阳脉，从足指端当至踝五寸，故
有八尺也，亦不取腑脏及支别矣。）足之六阴，从足至胸中六尺五寸，六六三丈六尺，五六三尺，
（□□□□□□足少阴，肾脉也。足厥阴，肝脉也。足六阴脉，从足至胸中六尺五寸。太阴少阴
俱至舌下，厥阴至顶，及入脏腑□□□□□数之也。平按∶注足少阴上原缺六字，拟作“足太阴
脾脉也”六字。袁刻将太阴脾脉补在六阴二字之上，阴下复脱脉字，与原抄不合。又脏腑下原缺
五字，谨根据上下注，作“与支别亦不”五字，袁刻于此处既不阙文，复脱“数之也”三字，与原
抄不合。）凡三丈九尺。乔脉从足至目七尺五寸，二七丈四尺，二五一尺，（乔，阴阳二乔也，
起处终处长短是同□□□□也。按中人七尺五寸，二乔脉皆起跟中，上□□□□七尺五寸，若为
合数？然二乔至目内 ，与足太阳合，上行络左右额角，故得合数，检少阳筋即知也。平按∶注
是同下原缺四字，袁刻只空二格，不合。五寸下，原抄直接二乔，无缺文，袁刻空七格，不合。
跟中上三字下，原抄缺四字，谨根据《阴阳乔脉》篇，拟作“至目内 ”四字，袁刻只空二格，不
合。又额角，额字袁刻误作颇。故得合数，得字误作为。均根据原本更正。）凡一丈五尺。督脉、任脉
各四尺五寸，二四八尺，二五一尺，（□□□□□□□□上行至头，任脉唯至两目之下，督脉上
行至目，复上□□□□□□极 行所其长与任脉不同，若为皆有四尺五寸？然任脉□□□□□外
循腹上行而络唇口者，督脉取其起于下极之故□于脊脊上至风府者，以充四尺五寸之数，余不入
数。平按∶注“上行至头”上，原缺八字，谨根据《督脉》篇，拟作“督脉起于少腹以下”八字。
“极 ”上原缺六字，谨根据《督脉》篇，拟作“颠，别下项，至下”六字。“然任脉”下原缺五
字，谨拟作“取其起胞中”五字。“故”下原缺一字，谨根据《督脉》篇拟作侠。）凡九尺。凡都
合十六丈二尺，此气之大经隧也。经脉为里，支而横者为络，络之别者为孙络，孙络之盛而有血
者疾诛之，盛者徐泻之，虚者饮药以补之。（人之血脉，上下纵者为经，支而横者为纬。□□足
左右各有十二，合二十四脉、阴乔、阳乔、任脉、□□□二十八脉，在肤肉之里，皆上下行，名
曰经脉。十五络脉及□络见于皮表，横络如纬，名曰络脉。皆是血气所□□□称为隧也。凡大小
络虚，皆须饮药补之，不可去血，去血虚虚，不可不禁也。平按∶“凡九尺”三字，原抄作“九”字，
根据《灵枢》、《甲乙》及本经上文，应作“凡九尺”三字。“为孙”下《灵枢》无“络，孙络之”
四字，“泻”上无“徐”字。注“为纬”下原缺二字，拟作“凡手”二字。袁刻空六格不合。“任
脉”下原缺三字，拟作“督脉合”三字，袁刻空五格不合。“及”下原缺一字，拟作“别”，袁
刻空四格，不合。所下原缺三字，拟作“贯注，故”三字，袁
刻空五格，不合。）
杨上善按语：本篇从开头到结尾，见于《灵枢》卷四第十七篇《脉度》，又见于《甲乙经》卷二第三篇《脉度》。
黄帝问道：我想了解经脉的长度。（此前已经论述了骨度和肠胃的大小长短，接下来应当根据[骨骼]来论述各条经脉的长短，所以需要询问此事。杨上善按语：注文中“根据”下原缺一个字，我推测补作“次”。）岐伯说：手和足的六条阳经，从手或足到头部长五尺，（手阳明经是大肠的经脉。手太阳经是小肠的经脉。手少阳经是三焦的经脉。这三条经脉分布在双手，所以共有六条经脉，其余仿照此例。各条经脉都按照营气运行的次序，手部的三条阴经和足部的三条阳经，都是从体内起始，走向手足；手部的三条阳经和足部的三条阴经，都是从体外起始，走向头[腹/项]。这里计算手足经脉的长短，所以都是从手足向体内方向计算的，这与手部[足部外起]十二经脉流注入身的数量也是相同的。杨上善按语：关于“手足之六阳”，《灵枢》和《甲乙经》都没有“足”字，怀疑是衍文。注文中“向于头”下原缺一个字，左边剩有月字旁，根据经文“足之三阴从足走腹”，推测补作“腹”，袁刻本作“项”，恐怕不妥。与手下原缺三个字，我推测补作“足外起”三个字。）总共三丈。
（计算手部六条阳经从指尖到眼睛，沿着骨度直行，长度为五尺，不取循行环绕以及向下进入缺盆连接肠胃的部分，只按骨度直线计算，去掉迂回行走的部分以及分支别络，所以总长为三丈。）手部的六条阴经，从手到胸中三尺五寸，三条阴经共一丈八尺，六条阴经共三尺，（手太阴经是肺的经脉。手少阴经是心的经脉。手心主经是心包络的经脉。手部的三条阴经也都直循骨度，从手到胸中三尺五寸，不取下入连接脏腑的部分，少阴经从心系上行连接目系及分支别络的部分也不计入。）总共二丈一尺。
足部的六条阳经，从足到头顶八尺，六八四丈八尺。（足阳明经是胃的经脉。足太阳经是膀胱的经脉。足少阳经是胆的经脉。计算人的骨度，从地面到头顶七尺五寸，所谓八尺是怎么回事？因为足部六条阳经，从足趾端应当到达脚踝上方五寸处，所以算作八尺，同样也不计入脏腑及分支别络。）足部的六条阴经，从足到胸中六尺五寸，六六三丈六尺，五六三尺，（[此处原文缺失，杨上善推测补作：足太阴脾脉也。]足少阴经是肾的经脉。足厥阴经是肝的经脉。足部六条阴经，从足到胸中六尺五寸。太阴经和少阴经都到达舌下，厥阴经到达头顶，以及进入脏腑[的部分不计入，与分支别络亦不]计算在内。杨上善按语：注文中“足少阴”上原缺六个字，我推测补作“足太阴脾脉也”六个字。袁刻本将太阴脾脉补在“六阴”二字之上，“阴”字下又脱漏“脉”字，与原抄本不符。另外“脏腑”下原缺五个字，我根据上下文注疏，补作“与支别亦不”五个字，袁刻本在此处既不阙文，又脱漏“数之也”三字，与原抄本不符。）总共三丈九尺。
跷脉（阴阳跷脉）从足到眼部长七尺五寸，两条跷脉共一丈五尺，二五一尺，（跷脉指阴跷和阳跷两条脉，起始处和终止处的长度是相同的[此处原文缺失，杨上善推测补作：至目内眦]。考察一般人身高七尺五寸，两条跷脉都起于脚跟中，向上[至目内眦]七尺五寸，如果作为合计数值？然而两条跷脉到达目内眦，与足太阳经汇合，上行联络左右额角，所以能得到合计的数值，检查少阳筋脉即可知晓。杨上善按语：注文中“是同”下原缺四个字，袁刻本只空两格，不符合。五寸下，原抄本直接接“二乔”，无缺文，袁刻本空七格，不符合。跟中上三字下，原抄本缺四个字，我根据《阴阳跷脉》篇，推测补作“至目内眦”四个字，袁刻本只空两格，不符合。另外“额角”的“额”字，袁刻本误作“颇”。“故得合数”的“得”字，误作“为”。均根据原本更正。）总共一丈五尺。
督脉、任脉各长四尺五寸，二四八尺，二五一尺，（[此处原文缺失，杨上善推测补作：督脉起于少腹以下]上行至头，任脉只到达两眼之下，督脉上行至眼，再向上[颠，别下项，至下]极行所，其长度与任脉不同，为何都说有四尺五寸？然而任脉[取其起胞中]向外循行腹部上行并联络唇口者，督脉取其起于下极之故[侠]于脊背，上至风府者，以充四尺五寸的数量，其余部分不计入。杨上善按语：注文中“上行至头”上，原缺八个字，我根据《督脉》篇，推测补作“督脉起于少腹以下”八个字。“极”上原缺六个字，我根据《督脉》篇，推测补作“颠，别下项，至下”六个字。“然任脉”下原缺五个字，我推测补作“取其起胞中”五个字。“故”下原缺一个字，我根据《督脉》篇拟作“侠”。）总共九尺。
总共合计十六丈二尺，这是气的大的通道。经脉位于内部，分支而横向的是络脉，络脉的分支是孙络，孙络盛大而有瘀血的，要迅速刺破放血，盛实的要缓慢泻除，虚弱的要用药物进补。（人体的血脉，上下纵向的是经，分支横向的是纬。[此处原文缺失，杨上善推测补作：凡手]足左右各有十二条，合二十四条脉、阴跷、阳跷、任脉、[督脉合]二十八条脉，在皮肤肌肉的内部，都是上下行走，称为经脉。十五条络脉及[别]络显现于皮表，横络如纬线，称为络脉。这些都是气血所[贯注，故]称为隧。凡是大小络脉虚弱，都需要用药饮补益，不可去血，去血会导致虚者更虚，不可不禁止。杨上善按语：“凡九尺”三字，原抄本作“九”字，根据《灵枢》、《甲乙经》及本经上文，应作“凡九尺”三字。“为孙”下，《灵枢》没有“络，孙络之”四字，“泻”上无“徐”字。注文中“为纬”下原缺两个字，我推测补作“凡手”两个字。袁刻本空六格不符合。“任脉”下原缺三个字，我推测补作“督脉合”三个字，袁刻本空五格不符合。“及”下原缺一个字，我推测补作“别”，袁刻本空四格不符合。所下原缺三个字，我推测补作“贯注，故”三个字，袁刻本空五格不符合。）
Note by Yang Shangshan: This chapter, from beginning to end, appears in *Ling Shu* (Spiritual Pivot), Volume 4, Chapter 17 "Mai Du" (Length of Vessels), and also in *Jia Yi Jing* (Classified Classic of Acupuncture and Moxibustion), Volume 2, Chapter 3 "Mai Du".
The Yellow Emperor asked: I wish to hear about the length of the vessels. (Previously, the lengths and sizes of bones and the intestines and stomach were discussed; next, according to [bones], the lengths of various vessels should be discussed, hence the inquiry. Note by Yang Shangshan: The original text lacks one character after "according to"; I tentatively supply "next".)
Qibo replied: The six Yang vessels of the hands and feet extend five chi from the hands or feet to the head. (The Hand-Yangming vessel is the vessel of the Large Intestine. The Hand-Taiyang vessel is the vessel of the Small Intestine. The Hand-Shaoyang vessel is the vessel of the Sanjiao (Triple Burner). These three vessels are distributed on both hands, thus there are six vessels in total; the rest follow this pattern. Each follows the sequence of Ying (Nutritive) Qi circulation. The three Yin vessels of the hands and the three Yang vessels of the feet all originate from the interior and move toward the hands and feet; the three Yang vessels of the hands and the three Yin vessels of the feet all originate from the exterior and move toward the head [abdomen/nape]. Here, calculating the lengths of the hand and foot vessels, they are counted from the extremities inward, which is consistent with the number of flow and entry of the twelve vessels of the hand [exterior origin] into the body. Note by Yang Shangshan: Regarding "the six Yang vessels of hands and feet," both *Ling Shu* and *Jia Yi Jing* lack the character "feet," suggesting it may be a superfluous addition. In the note, one character is missing after "toward the head"; a radical resembling 'moon' remains on the left. Based on the text "the three Yin vessels of the feet travel from the feet to the abdomen," I tentatively supply "abdomen." Yuan's edition supplies "nape," which seems inappropriate. Three characters are missing after "with the hand"; I tentatively supply "originating from the exterior of the feet.") The total is three zhang.
(Calculating the six Yang vessels of the hands from the fingertips to the eyes, moving straight along the bone structure, the length is five chi. It does not include the parts that curve around or descend into the clavicular fossa to connect with the intestines and stomach. Only the straight line along the bone structure is taken, excluding winding paths and branch vessels, resulting in a total of three zhang.) The six Yin vessels of the hands extend three chi and five cun from the hands to the chest. The three Yin vessels total one zhang and eight chi; the six Yin vessels total three chi. (The Hand-Taiyin vessel is the vessel of the Lungs. The Hand-Shaoyin vessel is the vessel of the Heart. The Hand-Jueyin (Hand-Zhujin) vessel is the vessel of the Pericardium. The three Yin vessels of the hands also follow the bone structure straightly, extending three chi and five cun from the hands to the chest. It does not include the parts descending to connect with the Zang organs or Luo-connecting with the Fu organs. The parts of the Shaoyin vessel ascending from the heart system to connect with the eye system, as well as branch vessels, are also excluded.) The total is two zhang and one chi.
The six Yang vessels of the feet extend eight chi from the feet to the vertex. Six times eight equals four zhang and eight chi. (The Foot-Yangming vessel is the vessel of the Stomach. The Foot-Taiyang vessel is the vessel of the Bladder. The Foot-Shaoyang vessel is the vessel of the Gallbladder. Calculating human bone structure, the height from the ground to the vertex is seven chi and five cun. Why is it said to be eight chi? Because the six Yang vessels of the feet, from the tips of the toes, should reach five cun above the ankle, thus calculated as eight chi. Similarly, Zang-Fu organs and branch vessels are not included.) The six Yin vessels of the feet extend six chi and five cun from the feet to the chest. Six times six equals three zhang and six chi; five times six equals three chi. ([Original text missing; Yang Shangshan tentatively supplies: The Foot-Taiyin vessel is the vessel of the Spleen.] The Foot-Shaoyin vessel is the vessel of the Kidneys. The Foot-Jueyin vessel is the vessel of the Liver. The six Yin vessels of the feet extend six chi and five cun from the feet to the chest. The Taiyin and Shaoyin vessels both reach under the tongue; the Jueyin vessel reaches the vertex. Parts entering the Zang-Fu organs [and branch vessels are also not] counted. Note by Yang Shangshan: Six characters are missing before "Foot-Shaoyin" in the note; I tentatively supply "The Foot-Taiyin vessel is the vessel of the Spleen" (six characters). Yuan's edition placed "Taiyin Spleen vessel" above "six Yin," and omitted "vessel" below "Yin," inconsistent with the original manuscript. Also, five characters are missing after "Zang-Fu"; based on context, I supply "and branch vessels are also not." Yuan's edition neither shows the omission nor includes the three characters "counted," inconsistent with the original. The total is three zhang and nine chi.
The Qiao vessels (Yin and Yang Qiao vessels) extend seven chi and five cun from the feet to the eyes. Two times seven equals one zhang and four chi; two times five equals one chi. (Qiao refers to the Yin and Yang Qiao vessels; their lengths from origin to termination are the same [missing text; Yang Shangshan tentatively supplies: to the inner canthus]. Examining an average person of seven chi five cun tall, both Qiao vessels originate from the middle of the heel and ascend [to the inner canthus] seven chi and five cun. If summed together? However, the two Qiao vessels meet at the inner canthus, merge with the Foot-Taiyang vessel, ascend to connect with the left and right temporal angles, thus allowing for a combined calculation, which can be verified by examining the Shaoyang tendons. Note by Yang Shangshan: Four characters are missing after "is the same" in the note; Yuan's edition leaves two spaces, inconsistent. Below "five cun," the original manuscript directly continues with "two Qiao" without omission; Yuan's edition leaves seven spaces, inconsistent. Below the three characters "from the middle of the heel," four characters are missing in the original; based on *Yin Yang Qiao Mai*, I tentatively supply "to the inner canthus" (four characters); Yuan's edition leaves two spaces, inconsistent. Additionally, Yuan's edition mistakenly writes "Po" instead of "E" in "temporal angle." In "thus obtaining the combined number," "De" (obtain) is mistakenly written as "Wei" (as). All corrected according to the original.) The total is one zhang and five chi.
The Du vessel and Ren vessel each measure four chi and five cun. Two times four equals eight chi; two times five equals one chi. ([Missing text; Yang Shangshan tentatively supplies: The Du vessel originates below the lower abdomen] ascending to the head. The Ren vessel only reaches below the two eyes. The Du vessel ascends to the eyes, then further upward [vertex, diverging down the nape, to the lower] extreme path. Its length differs from the Ren vessel, yet why are both stated as four chi and five cun? However, the Ren vessel [taking its origin from the uterus/bao zhong] circulates externally along the abdomen upward and connects with the lips and mouth. The Du vessel takes its origin from the lower extreme [flanking] the spine, ascending to Fengfu. These parts fill the count of four chi and five cun; the remainder is not counted. Note by Yang Shangshan: Eight characters are missing before "ascending to the head" in the note; based on *Du Mai*, I tentatively supply "The Du vessel originates below the lower abdomen" (eight characters). Six characters are missing before "extreme"; based on *Du Mai*, I tentatively supply "vertex, diverging down the nape, to the lower" (six characters). Five characters are missing after "However, the Ren vessel"; I tentatively supply "taking its origin from the uterus" (five characters). One character is missing after "Therefore"; based on *Du Mai*, I supply "flanking" (Xia).) The total is nine chi.
The grand total is sixteen zhang and two chi. These are the major meridians of Qi. The Jing vessels (Main Vessels) are internal; branches that run horizontally are Luo vessels (Connecting Vessels); divisions of Luo vessels are Sun vessels (Sun Vessels). Where Sun vessels are abundant and contain blood, puncture them quickly to release blood. Where abundance exists, slowly drain it; where deficiency exists, administer medicine to tonify. (Human blood vessels running vertically up and down are Jing. Branches running horizontally are Wei (Latitudinal). [Missing text; Yang Shangshan tentatively supplies: Generally, hands] and feet each have twelve on the left and right, totaling twenty-four vessels. Plus Yin Qiao, Yang Qiao, Ren vessel, [and Du vessel combined] make twenty-eight vessels. Located within the skin and flesh, all running up and down, they are called Jing vessels. Fifteen Luo vessels and [divergent] vessels appear on the skin surface; horizontal vessels like weft threads are called Luo vessels. All are where Qi and Blood [penetrate and inject, thus] called Sui (Tunnels). Whenever large or small Luo vessels are deficient, they must be supplemented with medicinal drinks. Bloodletting is prohibited; removing blood causes further deficiency in the deficient, which must not be allowed. Note by Yang Shangshan: The three characters "Fan Jiu Chi" (Total nine chi) were originally written as just "Jiu" (Nine); based on *Ling Shu*, *Jia Yi Jing*, and the preceding text of this chapter, it should be "Fan Jiu Chi" (Three characters). After "Wei Sun," *Ling Shu* lacks the four characters "Luo, Sun Luo Zhi"; before "Xie" (Drain), the character "Xu" (Slowly) is missing. In the note, two characters are missing after "Wei" (Weft); I tentatively supply "Fan Shou" (Generally Hands). Yuan's edition leaves six spaces, inconsistent. Three characters are missing after "Ren Mai"; I tentatively supply "Du Mai He" (Du Vessel Combined). Yuan's edition leaves five spaces, inconsistent. One character is missing after "Ji" (And); I tentatively supply "Bie" (Divergent). Yuan's edition leaves four spaces, inconsistent. Three characters are missing after "Suo" (That which); I tentatively supply "Guan Zhu, Gu" (Penetrate and Inject, Thus). Yuan's edition leaves five spaces, inconsistent.)