Chapter 50 FEELING AND IDENTIFYING THE PULSE QUALITY THE EIGHT BASIC PULSE QUALITIES PULSES WITH IRREGULARITIES OF RATE OR RHYTHM THREE NON-TRADITIONAL PULSE QUALITIES CLASSIFICATION OF PULSE QUALITIES The eight basic groups of pulse qualities The different aspects for the Classification of pulse qualities Classification of pulse qualities according to Qi, Blood and Body Fluids patterns Classification of pulse qualities according to the Eight Principles Classification of pulse qualities according to the Six Stages patterns Classification of pulse qualities according to the Four Levels patterns Classification of pulse qualities according to the Triple Burner patterns PULSE QUALITIES INDICATING DANGEROUS CONDITIONS The pulse ‘qualities’ described in Chinese books over the centuries have varied but they have been standardized today into 28 or 29 qualities. In theory, there is no special reason why we should be restricted to using only those terms; for example, there is no ‘Hard’ pulse quality, but this is a term that often comes to mind when feeling a particular pulse. However, it is important to train oneself to use the set terminology of pulse qualities in order to establish a common ground of communication among practitioners and between teachers and students; for example, a practitioner or student might describe a pulse as ‘squidgy’ in his or her own terminology (in fact, the term ‘squidgy’ describes the Soggy pulse quite well) but this would not be much use to other practitioners or students. The pulse qualities discussed are as illustrated in Table 50.1. The order in which I have arranged these 29 pulse qualities is different from that traditionally used in Chinese books. The first 8 qualities are the traditional, basic ones, that is, Floating, Deep, Slow, Rapid, Empty, Full, Slippery and Choppy. The other 21 qualities are arranged in three groups: For each pulse quality, I shall discuss the following: Box 50.1 summarizes the eight basic pulse qualities. The traditional description of a Floating pulse was like ‘feathers being ruffled by the wind’. The ‘Classic of Difficulties’ in Chapter 18 says: ‘When the pulse is Floating, it is felt moving above the muscle.’1 Generally speaking, the Floating pulse indicates the presence of a pathogenic factor on the Exterior of the body: it is therefore associated with exterior symptoms caused by invasion of Wind. Indeed, the presence of aversion to cold, fever (or being hot to the touch) and a Floating pulse is enough to diagnose an invasion of an external pathogenic factor. Thus the Floating pulse is one of the main clinical signs of invasion of Wind. In fact, the ‘Discussion of Cold-induced Diseases’ says: ‘A Floating pulse, stiffness and pain of the neck and aversion to cold are signs of the Greater-Yang pattern [invasion of Wind].’2 The reason that the pulse becomes floating in invasions of external pathogenic factors is that when the body is attacked by external evils the Defensive Qi is attracted to the surface of the body and the space between skin and muscles, to fight the external pathogenic factors. Thus, the increased Yang-Qi on the surface of the body is reflected in a more Yang pulse (i.e. Floating). However, if the patient has weak Defensive Qi and does not react well to the invasion of pathogenic factors, the pulse may not be Floating. Under the following conditions, a Floating pulse is normal and does not indicate a pathology: Box 50.2 summarizes the clinical significance of a Floating pulse. This indicates an External-Full condition, found when the patient has a strong Defensive Qi. The Floating pulse without strength in interior conditions may also be associated with prolapse of the stomach, in which case the pulse would also be Fine or Soggy. Box 50.3 summarizes Western conditions that may be indicated by a Floating pulse. A Slow pulse almost always indicates a Cold pattern. A different interpretation of a Slow pulse is that it denotes a problem in the Yin organs, as opposed to the Rapid pulse, which indicates a problem in the Yang organs; however, this is a broad generalization and it is not that clinically relevant. The ‘Classic of Difficulties’ in Chapter 9 says, ‘Rapid pulse indicates problems in the Yang organs, the Slow pulse problems in the Yin organs’.3 A Slow pulse in chronic conditions may also indicate a deficiency of the Original Qi (Yuan Qi). Box 50.5 summarizes the clinical significance of a Slow pulse. Box 50.6 summarizes conditions with contradictory pulse and Heat symptoms. Dr Shen relates a Slow pulse always to a Heart disharmony and poor circulation and, paradoxically, it is often seen in people who jog a lot: according to Dr Shen, excessive jogging (in his opinion more than 4 miles a day) leads to a dilation of the blood vessels which eventually becomes permanent and therefore slows the circulation down so that the pulse becomes Slow. As mentioned above under the Slow pulse, the ‘Classic of Difficulties’ relates the Rapid pulse to problems of the Yang organs, and the Slow pulse to problems of the Yin organs. Of course, this is a broad generalization which suffers from exceptions (e.g. Liver-Fire may manifest with a Rapid pulse). Common conditions which present with a Rapid pulse include Stomach-Heat, Heat in the Intestines, Lung-Heat, Liver-Fire, Heart-Fire, Yin deficiency with Empty-Heat, Phlegm-Heat, Damp-Heat and invasion of Wind-Heat. The Rapid pulse is also seen in the Lilium Syndrome described in Chapter 3 of the ‘Synopsis of Prescriptions from the Golden Cabinet’.4 Box 50.7 summarizes the common clinical manifestations of a Rapid pulse. The following are examples of situations when the Rapid pulse does not correspond to Heat. Box 50.8 summarizes those situations when a Rapid pulse does not correspond to Heat. The Empty pulse indicates Qi deficiency at its beginning or middle stages; in chronic Qi deficiency, the Empty pulse will usually become Weak (see below). Since most of the patients we see suffer from chronic conditions, the classic Empty pulse is relatively rare. When discussing the clinical significance of the ‘Empty’ pulse, it is important to be precise about one’ terminology: there is a difference between the classic ‘Empty’ pulse as defined above, indicating purely Qi deficiency, and an empty-type pulse, which encompasses a broad range of deficient pulses, such as Weak, Fine, Choppy, etc. It is therefore important, especially in training clinics, not to use the word ‘Empty’ in a loose sense but only to indicate a precise pulse quality. Box 50.9 summarizes the clinical significance of an Empty pulse. A proper identification of the Full pulse is essential to determine the correct principle of treatment in chronic conditions which are usually characterized by the simultaneous presence of Full and Empty patterns. In such cases, we must have a clear idea in mind as to what our treatment strategy should be, that is, tonify the body’ Qi or expel pathogenic factors. When we are confronted by these alternative treatment strategies, the pulse quality is extremely important in our deciding which one to choose; if the pulse is Full it is usually better to concentrate our attention on expelling pathogenic factors, even if the condition is chronic. Postviral fatigue syndrome is a case in point. In this condition there is nearly always deficiency, usually of Qi, and Excess, usually of Dampness, and I often base my decision whether to tonify Qi or resolve Dampness on the pulse quality: if it is Full or of the full type, I start by resolving Dampness rather than tonifying Qi. The same principle applies to any chronic conditions manifesting with simultaneous deficiency and Excess. Box 50.10 summarizes the common conditions presenting with a Full pulse.
PULSE QUALITIES
INTRODUCTION
FEELING AND IDENTIFYING THE PULSE QUALITY
THE EIGHT BASIC PULSE QUALITIES
Floating
Pulse description
Clinical significance
Combinations
Exterior conditions
Floating-Full
Interior conditions
Deep
Combinations
Slow
Clinical significance
Common Cold conditions manifesting with a Slow pulse
Contradictory manifestations characterized by a Slow pulse and Heat symptoms
The Slow pulse and jogging
Rapid
Clinical significance
Differentiation of similar pulses
Empty
Clinical significance
Full
Clinical significance