2016年3月9日星期三

Case study of Acute zonal occult outer retinopathy (AZOOR) treated with Chinese Medicine (TCM)

Acute zonal occult outer retinopathy (AZOOR) is a less common eye disease. At its onset, the major symptom is the affected eye seeing flashes with obvious visual field defect, and yet fundus examination fails to reveal any corresponding retinal abnormality. Initially, it is mostly unilateral but later the other eye may also be affected. The disease is more commonly found in women.

Visual field test and ERG can detect the abnormality. Currently, it is however yet to have a proven cure of the disease (including using steroids or undergoing immunity modulation therapy). Some statistics indicated that with this disease, it takes six months for the patient to have a more stable vision.

The following case study seek to demonstrate the characteristics of Chinese Ophthalmology in treating this disease.

Case Study 1:

Patient (aged 45, female) came for consultation on 2011/8/4. She reported both eyes seeing flashes for two weeks; and two days before the left eye nasal inferior visual field was obstructed, the condition of which the Western Medicine practitioner diagnosed as AZOOR.

The patient had a history of stiff neck, which had received massage therapy for the past year, with the last one took place on 2011/7/31 (five days before the first consultation). Two days later at night, she experienced numbness in and could not move her upper arms, accompanied by tinnitus.

She reported fair appetite, fitful sleep, frequent urination, and difficult defaecation once every 2-3 days. In the most recent two months, she had a menstrual cycle of two weeks with the period lasted for 4-5 days.

Examination:

Obvious tenderness at some left side cervical transverses

Aided VA:
     R: +6.00 / -0.50x170 VA: 0.8+2
     L: +6.00 / -0.50x20 VA: 0.8-2

Tonometry: R: 11 mmHg L: 11 mmHg

Fundus examination :
     C/D ratios: 0.2-0.3 (OU), narrowing of retinal vessels




Visual field examination:
Figure 1 Right eye visual field test results (2011/8/2)

Figure 2 Left eye visual field test results (2011/8/2)


Figure 3 Left eye visual field test results (2011/8/3)

Tongue inspection: red tongue with petechiae and thin white coating

Pulse manifestation: deep, thready and rapid

Diagnosis: left eye AZOOR

TCM diagnosis: left eye hemianopia

Syndrome: yin deficiency and stirring wind, qi stagnation and blood stasis

Therapeutic principles: extinguishing wind and nourishing yin, activating blood and dredging collaterals

Treatments by oral Chinese medicine: Rhizoma Gastrodiae (天麻), Ramulus Uncariae cum Uncis (鈎藤), Fructus Liquidambaris (路路通), Lumbricus (地龍), Salviae Miltiorrhizae (丹參), Radix Astragali seu Hedysari (黃蓍), Puerariae Radix (葛根), Fructus Lycii (枸杞子), Fructus Mori (桑椹子), Radix Polygoni Multiflori (制首烏), etc.



Figure 4 Left eye visual field test results (2011/9/12)



Figure 5 Left eye visual field test results (2011/11/10)



Figure 6 Right eye visual field test results (2012/3/29)



Figure 7 Left eye visual field test results (2012/3/29)



Figure 8 Right eye visual field test results (2012/4/25)

Figure 9 Left eye visual field test results (2012/4/25)


Figure 10 Left eye visual field test results (2012/6/28)


Figure 11 Left eye visual field test results (2012/10/18)


Table 1 AZOOR case study 1 visual field test results summary
Date
Strategy 30-2
Strategy 24-2
L
R
L
2011/8/2

VFI:99%
MD:-1.52dB
VFI:86%
MD:-6.76dB
2011/8/3
VFI:88%
MD:-5.41dB


2011/9/12
VFI:97%,
MD:-1.14dB


2011/11/10
VFI:97%
MD:-1.28dB


2011/12/29
VFI:99%
MD:-0.88dB


2012/3/29

VFI:96%
MD:-2.25dB
VFI:99%
MD:-0.23dB
2012/4/25

VFI:99%
MD:-0.47dB
VFI:100%
MD:+0.44dB
2012/6/28

VFI:100%
MD:-0.46dB
VFI:98%
MD:-1.46dB
2012/10/18
VFI:100%
MD:-1.44dB



Table 2 AZOOR case study 1 vision changes
Date
VA(R)
VA(L)
2011/8/4
0.8+2
0.8-2
2011/12/29
0.8+2
0.8-1
2012/1/27
1.2-1
1.0-3
2012/2/15
1.2-1
1.0-2
2012/3/15
1.2
1.0-3
2012/6/19
1.2
1.0-3
2012/9/11
1.2
1.0
2013/3/28
1.2
1.0-2
2013/7/6
1.0
1.0-1
2013/11/21
1.2-1
1.0-2


Case Study 1 summary:

In this case study, the chief complaint was left eye visual field loss. At the initial consultation, the patient’s bilateral central vision was slightly below normal, while the left eye visual field test also showed significant nasal visual field impairment. When the patient had follow-up consultation on the 14th day of treatment (2011/8/18), she felt the left eye nasal inferior visual field obstruction had reduced, other symptoms had also gradually alleviated. Despite research statistics demonstrated that with this disease the visual field deterioration tended to continue in the first six months with no subsequent significant improvement; in this case study, the patient had noticeable improvement in just a month or so after receiving TCM treatment.

Given the patient had experienced different visual field test scenarios, the results are listed in Table 1. On 2011/8/3 (the day before the first consultation), the left eye visual field (30-2) results were: VFI (Visual Field Index): 88%, MD (Mean Deviation): -5.41dB while those for the 2011/9/12 vision field test (30-2) were: VFI: 97%, MD: -1.14dB.

In this case study, the patient, after receiving treatment, took only 40 days to achieve considerable visual field improvement. Up to 2011/12/29, the left eye visual field function had raised to VFI: 99%, MD: -0.88dB. Thereafter, when the patient took the medication slightly below the recommended dosage, some fluctuation in the visual field function resulted. It nevertheless returned more or less to the normal range when the recommended dosage was later resumed.

Besides, the patient underwent an OCT on 2011/12/29 with no abnormality observed. The patient did no ERG as recommended when she found her vision had significantly improved.

2016年1月2日星期六

2016 新年祝福

2015年最後一天再為一位八十多歲長者覆診,他是一位患有後期濕性年齡相關性黃斑病變病人,專誠乘飛機從外地來港看病。

求診初時,他的眼睛需反覆注射西藥控制病情,兩年來每1至1.5個月注射一次。記得這位長者於初時對注射該類藥物相當反感。因我判斷他的病況不能單靠中藥控制妥當,而且他身在遠方,所以我只好每次都詳細地解釋他的情況是要中西並用,目標就是減少西藥注射次數及儘可能穩住病情。幸好在鼓勵下他回國後仍有繼續服用中藥及西醫的治療,而保住他的眼睛。

最初半年,他的其中一隻眼睛視力由四成提升至七成,另一隻眼睛因已太嚴重而只能夠穩住它,同時把注射西藥間距時間延長。成效已算很不錯,而且也超出了預期目標。

跟其他同類病人一樣,當改善後還會要求多一點。其後的兩年覆診,他每次也問我相同的問題:「是否可不用再注射這些西藥?」 我也不厭其煩跟過往一樣地解釋。

2016年1月1日收到其女兒電郵祝賀新年,及感謝我在除夕當天病人眾多時還對他爸爸耐心解釋及安慰。更祝願在這新一年有更多患者能得到像他爸爸一樣的治療。

其後回覆我有幸為這位值得尊重的長者診治,又感謝他給我機會服侍我的神!也謝謝他提醒了我,病人數量雖有增長,診症忙得不可開交時,還是不要忘記初衷。除醫治病者身體疾患外,還要由心去關心病人及醫治他們的心。

2015年12月17日星期四

眼與精、氣、血、津液及神之關係

眼睛能正常運作除跟早前所提到五臟關係密切外,還有賴於精、氣、血、津液濡養及神的統管。

《審視瑤函》中提到後者在視覺及眼睛的功用,謂:「五輪之中,四輪不能視物,惟瞳神乃照物者,風輪則有包衛含養之功,故凡風輪有損,瞳神不久留矣,此即唇亡齒寒,輔車相依之意也,或曰:瞳神水乎,氣乎,血乎,膏乎,曰非血,非氣,非水,非膏,乃先天之氣所生,後天之氣所成,陰陽之妙蘊,水火之精華,血養水,水養膏,膏護瞳神,氣為運用,神則維持,喻以日月,其理相同,而午前則小,午後則大,亦隨天地陰陽之運用也。」

以下簡單介紹精、氣、血、津液及神跟眼睛視覺之關係:

精為神之宅,又為氣之母,能與氣、血、津液相互滋生及轉化。精是維持視覺的基本物質中最重要之基礎。

《靈樞・大惑論》:「歧伯對曰:五藏六腑之精氣,皆上注於目而為之精。精之窠為眼,骨之精為瞳子,筋之精為黑眼,血之精為絡,其窠氣之精為白眼,肌肉之精為約束,裹擷筋骨血氣之精而與脈並為系,上屬於腦,後出於項中。」


溫養作用:眼受五臟六腑上輸之精氣溫煦和濡養,方能維持眼正常功能。

推動作用:氣的正常升降出入運動不息,才能推動精、血、津液不斷地運行上頭濡養目竅。

固攝作用:真氣充足,固攝脈中之血不得外溢;目內津液亦不致乾枯。控制瞳神的聚散。


血對全身組織有營養及滋潤作用,是人體賴以生存之重要物質。血能載氣,氣、血、津液同行於脈中,除提供血至眼部外,還使眼得到氣和津的供應。《審視瑤函》:「即肝中升運於目,輕清之血,乃滋目經絡之血也,此血非比肌肉間混濁易行之血,因其輕清上升於高而難得,故謂之真也。」


另《審視瑤函》中描述血對眼之功能及其引致疾患之比喻如下:「夫目之有血,為養目之源,充和則有發生長養之功,而目不病,少有虧滯,目病生矣」,「猶水為生物之澤,雨露中和,則滋生之得宜,而草木秀,亢旱淫潦,則草木壞矣,皆一氣之失中使然也,是故天之正氣不和,則陰陽偏盛,旱潦乘之,水之盈虧不一,物之秀槁不齊,雨暘失時,而為物之害也,譬之山崩水湧,滂沛妄行,不循河道而流,不得已而疏塞決隄,以泄其氾濫,使無渰溢害物之患。」


津液
津液是體內正常之水液,散佈全身,有滋潤及濡養之作用。津液上滲於目,在外為淚液,在內則主要為神膏及神水。眼睛能夠視物有賴身體臟腑無間斷地上滲津液滋潤及濡養,以維持陰陽平衡。

《靈樞・口問》:「液者,所以灌精儒空竅者也,故上液之道開則泣,泣不止則液竭,液竭則精不灌,精不灌則目無所見。」

《審視瑤函》:「大概目圓而長,外有堅殼數重,中則清脆,內包黑稠神膏一函,膏外則白稠神水,水以滋膏,水外則皆血,血以滋水,膏中一點黑瑩,乃是腎膽所聚之精華,惟此一點燭照鑒視,空闊無窮者,是曰瞳神,此水輪也,其妙有三,膽汁腎氣心神也,五輪之中,四輪不能視物,惟瞳神乃照物者。」

《審視瑤函》:「神水者,由三焦而發源,先天真一之氣所化,在目之內,雖不可見,若被物觸損傷,則見黑膏之外,有似稠痰出者是也,即目上潤澤之水,水衰則有火盛燥暴之患,水竭則有目輪大小之疾,耗澀則有昏眇之危,虧者多,盈者少,是以世無全精之目。」


眼賴神生:形為神之體,神為形之用,神氣生於精氣、營衞,舍於血脈,又能統馭精氣和營衞;血舍魂,氣舍魄,魂魄亦皆神。
《靈樞・大惑論》:「目者五臟六腑之精也,營衛魂魄之所常營也,神氣之所生也。故神勞則魂魄散,志意亂。是故瞳子黑眼法於陰,白眼赤脈法於陽也,故陰陽合傳,而精明也。目者,心使也。心者,神之舍也。故神精亂而不轉,卒然見非常處,精神魂魄,散不相得,故曰惑也。」

眼因神識:《外台秘要》:「眼之黑白分明,肝管無滯,外托三光,內因神識,故有所見。」《審視瑤函》:「神光者,謂目中自然能視之精華也,夫神光原於命門,通於膽,發於心,皆火之用事,神之在人也大矣,在足能行,在手能握,在舌能言,在鼻能嗅,在耳能聽,在目能見」

望目察神:從眼睛是望診中望神的一個重要渠道。精氣是神的物質基礎,五臟六腑精氣皆上注於目。精氣充沛目光精彩,靈活有神;精氣衰竭則目暗精迷,漠然失神。


可見中醫眼科診治眼疾時,除了以五臟六腑與眼睛之關係審證求因外,還不會忽略精、氣、血、津液及神等之生理病理關係,整體及全面地進行辨證施治。