Therapeutic Value of Semiconductor Laser Irradiation in Nasal
Cavity to Persistent Vegetative State: one case report
Xiao Xuechang, Chu Xiaofan, Guo Yidong Jiazheng, Su Xiaolin,Zhou Cixiong,, Suo Ping,
Department of neurology Shenzhen People’s Hospital (Shenzhen 518020)
[Abstract] Objective To explore the therapeutic value of low power semiconductor laser
irradiation in nasal cavity to persistent vegetative state (PVS). Method One severely brain injured
patient being in persistent coma for 260 days had been undertaken low power semiconductor laser
irradiation in nasal cavity. With the laser wavelength was 650nm, the power 4.0mW, 60 minutes every
time. 1 or 2 times a day. The irradiation has been given 50 times to this patient. Before and after the 50
times procedure, brain SPECT blood infusion images were taken and the remission of consciousness
has been observed. Results Before the procedure, brain SPECT revealed severe ischemia in right
frontal lobe, parental lobe, temporal cortex and thalamus and basal ganglions, with seriously damaged
cerebral function disorder. After the procedure, the ischemia had been alleviated in some areas
mentioned above. And the patient became conscious on the 380th day after the injury, with GCS being
improved from 7 to 12. Conclusion Low power laser irradiation in nasal cavity may improve brain
blood infusion, activate cerebral function and this may arouse the patients with persistent vegetative
[Key words] Low power lasers; Vegetative state; Single photon emission computer tomography
Treatment on Persistent Vegetative State (PVS) is presently a hard problem in neurological
rehabilitation field. There are many trial treatment for PVS, but due to complicated mechanism change
of PVS, no exact and effective method has been found up to now. Recently, we tried Low Power
Semiconductor Laser Irradiation in nasal cavity. (LINC) to treat a severe brain injured patient being in
PVS, and unexpected effect achieved, the report is as follows:
1. Case and Method
1.1 Clinical literature A 22-year-old girl named Zhan, a student of Southwest Politics & Law
College. Charge No.263974, CT No. 58933. In Aug 23rd , 2001, she was suffered from brain trauma
and unconsciousness due to traffic accident, upon which she was sent to Shenzhen People’s Hospital.
CT examination demonstrated hematoma below hard membrane of right forehead temporal. 2 days
after hematoma clearance, hematoma below hard membrane appear again in the former hematoma
part. After 2nd operation, brain CT exam showed hydrocephalus, then conducted operation of
hydrocephalus ventricule-abdominal cavity separation, following hemostat, anti-inflammation and
brain protection treatment. On Oct 25th, 2001, referred to brain surgery of Shenzhen People’s Hospital
with following state: persistent coma, operation cut in right forehead temporal, no voluntary
movement, stable life sign, active limbs sinew reflex. Coma GCS remark 6, and carry out hyperbaric
oxygenation treatment. Conduct mending on damaged skull of right forehead temporal on Dec 19th ,
2001. On April 25th, 2002, the patient was transferred to Neurology for rehabilitation treatment. It can
be seen as follows: obnubilation with coma, cornea reflex, eyelash sign (+), circle, focus reflex, double upper
extremities is of IIII grade and double lower extremities of II grade. Muscular tension increased, sinew reflex
hyperfunction, right lower extremity Babinski sign (±), electroencephalogram demonstrated that two sides
is not symmetrical, left side is 99.5c/s1030mVα, low amplitudeβand occasionally θwave act,; for right side,
10c/s35mVα,more θwave and more 1530c/s510mVβact; visual response and over aeration is of no use. All
means abnormal electroencephalogram.
Clinical Evaluation for transferring state: Coma GCS Table grades 7; Rancho Los Amigos, RLA)
Evaluate as II grade; Brain SPECT revealed (on Apr 29) severe ischemia in right frontal lobe, parental lobe,
temporal cortex and thalamus and basal ganglions, with seriously damaged cerebral function disorder.
Semiconductor laser irradiation in nasal cavity, power 4.0mW, instant effect (examine after 30mins):
blood supply recovered in right frontal lobe, parental lobe, temporal cortex and thalamus and basal
ganglions; Induced potential evaluation: NCV examination revealed severe damage in double side calf
nerves and left shin nervous movement transmission function; Left calf intestines nerves transmission
function; BAEP exam showed lightly damage in hearing transmission left side to brain stem, abnormal
right side function; Diagnosis: Persistent Vegetative State after operation on severe brain trauma.
1.2 Rehabilitation Therapy Drug: cytidine diphosphate choline，cerebral polypeptide etc.
Physiotherapy: hyperbaric oxygenation therapy for 5 courses (total 50 times) during hospitalization.
After Low Power Laser Intra-vascular Irradiation 3.0mW×60mins×10times, and change to Nasal
Cavity Irradiation 4.0mW×60mins×40times. Needle: Si Shencong. Motion Therapy: Anti-spasm,
After above therapy for 55 days, the ill state improved, coma GCS remark 9, the patient left
hospital for hard economy on June 20th , 2002, with still low coma, SPECT demonstrated: compared
with that of Apr 29, above severe ischemia in brain is partly improved. After hospitalization, conduct
semiconductor laser nasal cavity irradiation, power 4.0mW, 60mins each time, 1~2 times a day.
Following information by phone on Sep 20th, 2002 is that the patient has become conscious with
recognition. On Oct 4th , we visited the patient, the neurological examination showed: consciousness,
understanding, unclear phonation, emotional reaction(recognize family member, show nervous when
many people is around, require relative accompany) , still urinary incontinence.; upper extremities is IV
grade of near tip and III grade of far tip, part separate movement, lower extremities is III grade of near tip and I
grads of far tip, part separate movement, but muscular tension enhanced, hyperfunction of double knees reflex,
right lower extremity ankle clonus is positive, right lower extremity Babinsk Sign (±). GCS grades 12, RLA
recognition grades IV-V.
This case of severe injured brain following persistent moderate coma has lasted over 6 months,
no voluntary movement, life sign is stable, urinary incontinence, GCS remark 7, which comply with
National Relative PVS Diagnose Standard . Treatment on Persistent Vegetative State is a presently a hard
problem in rehabilitation field. Present treatment includes drug, h yperbaric oxygenation and stimulation of
voice, light and electronics. Drug includes DA such as TRH. The drug mainly act to strengthen
conscious system. PVS hyperbaric oxygenation is a valid and recognized method, but accumulative
treatment of 100 even 200 times is needed. In 1993, it is reported in Guangdong Police Hospital that a
patient with coma caused by brain trauma for 130 days, become conscious after Low Power He-Ne
Laser Intra-vascular Irradiation. In recent 10 years, Basic study on Low Power Laser Therapy
mechanism has developed greatly. Study showed: Low Power Laser can adjust inequilibrium state of
Nerve-Endocrine-Immune Net, enhanceβ-EP level of migraine patient, adjust CCK8 level of
Parkinson’s disease patient  , adjust L-ENK level, adjust Single Amine neurotransmitter level in brain
tissue of mouse, improve brain blood perfusion of cerebral infarction patient, activate brain cells
function  , low power He-Ne Laser irradiation in nasal cavity can affect electroencephalogram
activity of rabbit. It is inferred from the above mechanism that it probably has the function of
consciousness. 4 operations has been carried out on the PVS patients. During hospitalization, in first 8
months, 50 times hyperbaric oxygenation therapy on the basis of drug and stop drug due to hard
economy, with only 100 times LINC therapy, become conscious after 380-day persistent coma due to
severe injured brain, LINC is considered to activate for consciousness. Because ILNC is of no any cut,
safety and without any side effect, as well as simple operation, it is repeatable, especially for
long-term use for patient with vegetative state.
 Zhu Yonglian. Neurology (No. 21), Neurological Rehabilitation. Beijing: The People’s Army
Medical Publishing House, 2001, 493-500.
 Xiao Xuechang, Zhe Xiaofan. Effects and Clinical New Development of Low Power Laser on
Nerve Endocrine Immune (NEI). 2002,24(1): 46-48.
Li Qingmei, Guo Kun, Kang Jingqiong etc. Study of EP before and after Low Power Laser
Irradiation in Nasal Cavity in Treatment of Head and Face Ache. China Neurology Magazine, 1998,
Li Qingmei, Guo Kun, Kang Jingqiong etc. Effect of Low Power Laser Irradiation In Nasal Cavity
to CCK-8 contents in plasma of Parkinson’s disease patient. China Neurology Magazine, 1999, 32(6):
Cheng Baihua. Function and Mechanism of “Optical Acupuncture”. Shanghai Acupuncture
Magazine, 1999, 18 (6): 34-36.
Gao Huizhen, Wu Qizhuan, Shi Fuming etc. Effects of Low Power Laser Irradiation on contents of
SA transmitters in brain tissue of rat. China Laser Medical Magazine, 1999; 8(1):36-38.
Liu Shanlin, Shi Dongyun, Wang Ruyao etc. Effect of Semiconductor Laser to Brain nerve
transmitter and plasma MDA of rat. China Laser Medical Magazine, 1998,7(3): 134-137.
Xiao Xuechang, Jia Shaowei, Zheng Xiyuan etc. Study of Single Photon Emission Computer
Tomography (SPECT) for Laser Intra-vascular Irradiation in Treatment of Cerebral Infarction. China
Physiotherapy Magazine, 2001, 24(3)l: 133-135.
Yang Yuqin, Chen Peiyuan, Shi Hongrun etc. Effects of Low Power He-Ne Laser Irradiation in
Nasal Cavity to electroencephalogram of Rabbit. China Laser Medical Magazine. 2000, 9(4):