Pattern Identification According to the Six Channels

• Pattern identification according to the six channels is an essential method in traditional Chinese medicine (TCM) used to analyze disease manifestations and confirm diagnoses by utilizing specific channels as guiding principles. This method is based on the understanding that each channel reflects a different aspect of health and disease.

• The six channels include: $tai yang$ (greater yang), $shao yang$ (lesser yang), $yang ming$ (bright yang), $tai yin$ (greater yin), $shao yin$ (lesser yin), and $jue yin$ (terminal yin). Each channel represents not only a distinct stage in the development of a disease but also a unique set of symptoms and corresponding treatment protocols.

• Application: This method is integral for identifying disorders caused by the six environmental pathogenic factors, including wind, cold, heat, dampness, dryness, and fire, that can invade the body and lead to illness. By assessing the symptoms and patterns associated with these channels, clinicians can develop targeted treatment plans, often utilizing acupuncture, herbal medicine, and dietary adjustments to restore balance and health.

Main Pattern Types

• Patterns are categorized into two primary groups based on their yang and yin characteristics:

  • Three Yang Patterns: $tai yang$, $shao yang$, and $yang ming$, which typically demonstrate outward manifestations and acute symptoms.

  • Three Yin Patterns: $tai yin$, $shao yin$, and $jue yin$, which indicate deeper, usually chronic conditions requiring internal healing.

• The yang channel patterns are often associated with the outward and early stages of disease progression, responding effectively to treatment, while the yin channel patterns relate to more internal, later stages of illness that require comprehensive care to resolve.

1. Tai Yang Patterns

• $Tai yang$ patterns are the first to emerge when the body is attacked by external pathogens, particularly those linked to wind and cold. They play a critical role in the development of febrile diseases and are divided into two fundamental categories: $tai yang$ channel patterns and $tai yang$ bowel patterns.

• Tai Yang Channel Patterns:

  • Causation: These patterns are caused by the pathogenic wind cold attacking the body's exterior, signifying the struggle between the ying and wei systems and the invading elements. They indicate the early stage of febrile diseases.
    

  • Tai Yang Channel Patterns due to Wind:
    

    • Manifestations: Common symptoms include fever, floating pulse, aversion to wind, moderate floating pulse, and sweating.

    • Pathogenesis: The condition is characterized by a battle between vital qi and pathogens that affects the exterior, with loose muscular interstices leading to disharmony between the ying and wei levels—a critical state that requires prompt attention.
      

  • Tai Yang Channel Patterns due to Cold:
    

    • Manifestations: Key symptoms include chills, absence of sweat, fever, and a floating tense pulse, indicating a significant imbalance.

    • Pathogenesis: This occurs when cold attacks the exterior, restraining wei qi and impairing surface warmth; vital qi continues to battle the pathogens, and the cold nature leads to contraction of blood vessels—as indicated by the tense pulse.

• Tai Yang Bowel Patterns:

  • These patterns develop when a $tai yang$ channel pattern is not alleviated and pathogens penetrate deeper, affecting the bladder channel. They can lead to significant water retention or blood stagnation within the body.
    

  • Tai Yang Bowel Patterns due to Water Retention:
    

    • Manifestations: Symptoms include chills, fever, floating or rapid floating pulse, oliguria (scanty urine), lower abdominal distension, and thirst followed by vomiting after consuming fluids.

    • Pathogenesis: Pathogens invade the bladder, causing dysfunction that prevents proper fluid drainage, leading to water remaining in the lower burner without the ability to vaporize.
      

  • Tai Yang Bowel Patterns due to Blood Stagnation:
    

    • Manifestations: Symptoms show as severe abdominal pain, mental confusion (including symptoms like mania and forgetfulness), normal urination, dark, tar-like stools, and a deep choppy or knotted pulse.

    • Pathogenesis: This pattern is driven by accumulation of heat in the lower abdomen causing blood stasis, impacting mental function and contributing to abnormal stool excretion patterns.

2. Yang Ming Patterns

• $Yang ming$ patterns reflect a fully manifested febrile disease characterized by excess heat in the stomach and large intestine, typically evolving from an untreated or improperly treated $tai yang$ pattern. They are significant in acute presentations of illness.

• Yang Ming Channel Patterns:

  • This pattern is marked by heat that spreads rapidly throughout the body, affecting the mind and causing severe discomfort.

  • Manifestations: Symptoms include high fever, dry yellow tongue coating, profuse sweating, intense thirst with a strong desire to drink fluids, irritability, and a flooding pulse indicative of excess internal heat.

  • Pathogenesis: This is characterized by internal heat dispersing outward, impairing body fluids, and causing an upward flare of heat that affects mental clarity and leads to discomfort.

• Yang Ming Bowel Patterns:

  • Excess heat combines with dryness and constipation in the large intestine, particularly troublesome during acute episodes.

  • Manifestations: Symptoms include tidal fever (aggravated in the afternoon), constipation, abdominal fullness, tenderness, distending pain, red tongue with dry yellow coating, and a deep or deep slow pulse with forceful beats reflecting intense internal heat.

  • Pathogenesis: A state where heat disperses outward while $yang ming$ qi rises, blocking stomach and large intestine function, leading to impaired body fluid and fecal movement due to heat accumulation.

3. Shao Yang Patterns

• Caused by pathogens infecting the gallbladder and disrupting its ability to disperse heat, leading to a half exterior-half interior pattern that complicates diagnosis and treatment.

• Manifestations: Symptoms include alternating chills and fever, fullness and bloating in the hypochondrium and abdomen, poor appetite, nausea, vomiting, wiry pulse, irritability, bitter taste in mouth, dry throat, and dizziness indicative of gallbladder dysfunction.

• Pathogenesis: This pattern is complex, as fever reveals a strong vital qi fighting against pathogens, while chills reflect their dominance. It signifies stagnation of qi within the $jue yin$ channel, showcasing a crucial interaction between the exterior and interior systems.

4. Tai Yin Patterns

• Occurring due to insufficient spleen qi resulting in cold damp, $tai yin$ patterns signify an interior deficiency pattern arising from factors such as direct cold attacks or weakened spleen function from poor treatment of yang channels.

• Manifestations: Symptoms often include feelings of fullness in the abdomen, vomiting, lack of appetite, loose stools, abdominal pain that is relieved with warmth and pressure, an aversion to fluids, pale tongue with white coating, and a slow pulse indicating a need for strengthening spleen qi.

• Pathogenesis: Dysfunction of the spleen leads to improper transportation and transformation of nutrients, contributing to an accumulation of cold damp in the body, hence requiring warmth and tonification to restore balance.

5. Shao Yin Patterns

• These patterns manifest during the late stages of febrile diseases when chronic illness results in the weakening of kidney and heart yang or yin. They are crucial for understanding the progression of more severe illnesses.

• Shao Yin Cold Patterns:

  • Manifestations: Symptoms such as pronounced somnolence, cold limbs, aversion to cold, chronic loose stools, listlessness, and pale tongue with a deep slow pulse indicate a significant insufficiency of yang energy.

  • Pathogenesis: The deficiency of heart and kidney yang fails to provide adequate warmth to the body, leading to oppression of blood and qi in the intestines, making treatment necessary for rejuvenation.

• Shao Yin Heat Patterns:

  • Manifestations: Symptoms include insomnia, irritability, heat sensation in palms, night sweats, dry mouth and throat, red tongue tip or dark red tongue with scant coating, and a thin rapid pulse indicating a deficiency in cooling.

  • Pathogenesis: Characterized by heart and kidney yin deficiency, leading to feelings of internal heat while indicating an urgent need for hydration and cooling treatment approaches.

6. Jue Yin Patterns

• Marked by the most complex and final stage of febrile diseases, often transferring from $shao yang$ patterns, these cases require keen clinical insight and intervention to avoid further complications.

• Manifestations: Symptoms often show serious systemic consequences, such as fullness in the upper abdomen, sensations akin to gas rumbling upward (known as "running piglet qi"), upper abdominal burning pain, significant thirst, avoidance of food, diarrhea, and cold extremities reflecting severe internal derangement.

• Pathogenesis: The interplay of heat in the upper body and cold in the lower creates a scenario of liver dysfunction, stagnation of liver qi affecting stomach function, and essential desiccation of fluids within the body.

Rules for Transmissions of the Six Channel Patterns

• The transmission of patterns through different channels offers insight into the disease progression and guides treatment.

• 1. Chuan Jing (Transmission Along the Channels):

  • Pathogens often induce varying patterns as they traverse different channels.

  • Favorable Transmission: Optimal sequence follows $tai yang → yang ming → shao yang → tai yin → shao yin → jue yin$.

  • Unfavorable Transmission: Pathogens might skip channels, e.g., going directly from $tai yang → tai yin$, often due to the patient's constitution or improper treatment leading to unintended shifts in disease manifestation.

• 2. He Bing (Simultaneous Transmission):

  • This occurs when multiple channel patterns manifest simultaneously, such as $tai yang$ and $shao yang$ together, complicating symptomatology and treatment approaches.

• 3. Bin Bing (Initial Sequential to Simultaneous Transmission):

  • One channel pattern may follow another without resolution, leading to both patterns be present simultaneously; for instance, an ongoing $tai yang$ presentation when $yang ming$ begins may illustrate exterior cold signs complemented by the "four greatnesses": great heat, great sweating, great thirst, and great pulse.

• 4. Zhi Zhong (Transmission Directly to a Yin Channel):

  • Cold damp may affect a yin channel directly without passing through yang channels, such as in cases of a direct $tai yin$ pattern from the illness onset due to the individual's health status and environment.