Y HOC VIET NAM THANG 1 - SO 1/2014
THU'C TRANG SAY THAI vA DI TAT BAM SINH O THE HE CON. C H A U NHU'NG NGU'm TIEP XUC C H A T DOC DA CAM TAI 2 XA CUA HUYEN
KIEN XU'QNG TINH T H A I BINH
Nguven Xuan Bai*
T O M TAT
Tim hieu thu'c trang say thai va di tat bam smh (DTBS) d the he con, chau ciia 225 ngffcJi hep xiic vdi chat doc da cam (CDDC) tai 2 xa Quang Binti va Binh Nguyen huyen Kien XffOng. Ket qua: Doi tu'ong nghien cifu (DTNC) CO do tuoi tff 61 - 70 chiem 47,6%, dff6i 60 tuoi chiem 34,2%; nam gidi 98,2%. Co tren 50%
tiep XLic vdi CDDC d giai doan 1961 - 1970 va tren 40% 6 giai doan 1971 - 1975. Ty le bi DTBS 6 con, chau DTNC con song la 7,8% va 3,4%. Nhom dj tat ve da cd xffdng khdp chiem ty le 43,0%; tam than kmh 26,6%, hm mach 11,4%, mat hoac tai miii hgng, rang ham mat deu chiem 8,9%. Ty le ngffdi vd, con gai, con dau DTNC da gap it nhat mot lan bien cd khi mang thai hoac sinh de theo thff tff fan iffdt ta: 29,6%;
18,1%; 21,4%, gap tff 3 lan trd len giam dan: 2,7%;
0,6%; 0,0%. So DTNC CO vd, con gai, con dau da bi say thai 1 lan theo thir tff lan Iffdt ta: 26,0%; 12,47o;
14,3%; tir ba fan trd len la: 3,6%; 1,7%; 0,0%. Trong so nhu'ng ngirdi con ciia DTNC hien dang mac benh, nhom benh ve cd xffdng khdp chiem ty le cao nhat (46,9% d con trai va 34,3% d con gai), thieu nang tri tu? {24,5% va 17,1%), nhom benh ve tieu hoa (23,5% va 14,3%).
SUMMARY
STATUS OF MISCARRIAGE AND BIRTH DEFECTS I N OFFSPRING OF PEOPLE EXPOSED TO ORANGE A G E N T / D I O X I N
I N TWO COMMUNES OF KIEN XUONG DISTRICT, T H A I B I N H PROVINCE The study was to find out the status of miscarnage and birth defects in offspnngs of 225 people exposed to Orange Agent/ dioxin in 2 communes of Quang Bmh and Bmh Nguyen, Kien Xuong district. Results: Study subjects aged 61-70 accounted for 47.6%, 34.2% under 60, 98.2 % men.
More than 50% people exposed to Orange Agent in the period 1961-1970 and 40% in the period 1971- 1975. The rate of birth defects in offspring (children or grandchildren) who are still alive is 7.8 % and 3.4%
respectively. Group of skin and musculoskeletal defects accounted for 43.0%, neuropsychiatnc defects 26.6%, cardiovascular 11.4%, eye or ear, nose and throat, dental all accounted for 8.9%. The proportion of
' Tfvdng Dai hoc Y That Binh
Phan bign khoa hgc: GS.TS Lu'dng Xuan Hien
wives, daughters, daughters-in-iaw of the study subject had at least one incident dunng pregnancy or birth was 29.6%, 18.1%, 21.4% , respectively, more than 3 times of incidents was: 2.7%, 0.6 %, 0.0 %, respectively. The proportion of wives, daughters, daughters-in-law of the study subject had at least one miscarriage was 25.0%, 12.4%, 14.3%, three times or more: 3.6%; 1.7%, 0.0% respectively. Among the sick children of the subject, musculoskeletal disease group accounted for the highest percentage (46.9% in boys and 34.3% m girls), mental retardation (24.5% and 17.1%), digestive disease group (23.5 % and 14.3 %).
I. DfyJ VAN OE
Hien nay, ffdc ti'nh cd khoang 4,8 trieu ngffdi Viet Nam bi nhiem chat doc da cam/dioxin (CDDC), sdng tap trung tai cac tinh dpc dffdng Trffdng Sdn va bien gidi vdi Campuchia. Hang tram nghin ngffdi trong so do da qua ddi. Hang trieu ngffdi va ca con chau ciia ho dang phai sdng trong benh tat, ngheo kho do di chffng ciia CDDC. Qua ket qua nghien cffu trong 18 nam ciia Trung tam nhiet ddi Viet - Nga, cac nha khoa hoc ket luan rang CDDC da gay ra hau qua y hpc va sinh hpc lau dai doi vdi sffc khoe con ngffdi, khdng nhffng ddi vdi cac cffu chien binh Viet Nam da tffng tham gia chien tranh, ma cdn ca the he thff 2, thff 3 la con em ciia nhffng ngffdi da bi phdi nhiem. Tham chi, ca nhffng tre em song trong vung bi nhiem chat doc hoa hpc cung cd bieu hien benh ly. CDDC da cd anh hffdng ve di truyen sinh thai, dac biet gay ra tinh trang say thai, Iffu thai hoac sinh con bi di tat bam sinh (DTBS) [1], [3]. •
Thai Binh khdng phai ta ndi My rai chat dpc Dioxin nhffng hau qua thi rat Idn, dirng thff 2 toan qudc sau Quang Nam, Oa Ning, bdi vi trong cupc khang chien vT dai dd gan 50.000 thanh nien Thai Binh da len dffdng bao ve To quoc. Khi chien tranh ket thiic ho trd ve mang tren minh chat dpc hoa hpc bi phdi nhiem - chat dpc da cam. Theo thong ke ciia nganh Lao dong xa hpi tinh. Thai Binh cd 27.934 ngffdi bi nhiem chat ddc da cam, day ia ddi tffdng da dffdc cdng
Y HOC VIET NAM THANG 1 - SO 1/2014 nhan, cdn khoang 7.000 ddi tffdng ntTa dang chd
tham djnh va cdng nhan.
Vi vay, de giiip hieu ro hdn ve hau qua ma CDDC gay ra cho the he tffdng lai tren dia ban tinh, chiing tdi tien hanh trien khai thffc hien nghien cffu: vdi muc tieu: Xac dinh ty le say thai va di tat bam sinh d the he con, chau cua nhiJ'ng ng&di tiep xuc vdi chat ddc da cam tai dja ban nghien cifu.
II. P H U ' a N G PHAP NGHIEN CU'U 2 . 1 . Oja ban va thdi gian nghien cu'u Nghien cu'u dffdc tien hanh tir thang 3 den thang 12 nam 2012, tai 2 xa ciia huyen Kien Xffdng gom Quang Binh va Binh Nguyen.
2 . 2 . B d i tu'dng n g h i e n cu'u
Nhffng cffu chien binh da tirng chien dau tai vung bj rai CODC dffdc cdng nhan la nan nhan CDDC va nhiJng ngffdi cd tien sir say thai hoac con, chau ciia cffu chien binh bi DTBS.
2.3. Phu'dng p h a p nghien cu'u Thiet ke nghien cffu: dich te hpc mo ta vdi thiet ke dieu tra cat ngang cd phan tich. Ap dung phffdng phap chon mau toan bp. Chpn toan bp nhu'ng ngffdi tffng tiep xiic vdi CDDC da dffdc cdng nhan la nan nhan CDDC va dang dffdc hffdng che do chinh sach cua nha nffdc. Phdng van ddi tffdng nghien cffu bang bp cau hdi da chuan bj tru'dc va kham sffc khde cho nhiitig doi tffdng bi DTBS.
III. KET QUA NGHIEN C U U
Bang 3.1: Phan bo DTNC theo xa, theo qidi, nhdm tuoi
Xa
Ouanq Binh Binh Nguyen Tong
Nhom tuoi
< 60 61-70
>70 Gi6i tinh Nam Nif
So lu'dng 108 117 225 77 107 41
221 4
Ty le (%) 48,0 52,0 100
34,2 47,6 18,2 98,2 1,8
Doi tifdng nghien cu'u thugc dia ban xi Quang Binh ehiem 48,0% va xa Btnh Nguyen chiem 52,0%.
Doi tu'dng d do tud'i 61 - 70 ehiem ty le cao nhat (47,6%)) tiip den la nhdm tud'i dddi 60 chiim 34,2%, sd ngu'di d do tuoi tren 70 chiim so lu'dng ft hdn (18,2%). Cd tdi 98,2%) ddi tdtdng la nam gidi.
Bieu do 3.1: Phan bd DTNC theo khoang thdi gian va hinh thu'c tiep xuc vdi CDDC
DTX tryc tiep HTX Gian tigp
So D TNC cd thdi gian dl bg ddi tiip xuc vdi chat doe da cam trong khoang thdi gian tu' nam 1961 dei\
1970 kha cao (51,1%> din 58,6%)). Sau nam 1975 ehf cd 2 ngu'di (0,9%) tlip xuc gian tiep vdi CDDC
Y H O C VIET NAM THANG 1 • SO 1/2014
Bang 3.2: Phan loai benh trong nhffng ngffdi con trai, con gai DTNC dang mac benh Con trai (n ^98) | Con gai ( n ^ 35) ' Benh
Cd xffdng khdp Tieu hda Tim mach Hd hap Tiet nieu Than kinh Thieu nang tri tue Khac
46,9
23,5
12,2SL
So eon trai cda DTNC hien dang mac benh la 98 tr&dng hdp va so con gal la 35 tr&dng hdp. Trong dd nhdm benh ve cd xu'dng khdp chiim t^ le cao nhat (46,9% d con trai va 34,3%) d con gai), tiep din la nhdm benh ve tieu hoa, thieu nang tri tue, cac nhdm benh khae chiim ty le thap hdn.
gaffg5.J/Ty ledj tatbam sinh d the he con, chau ciia DTNC Dj tat bam sinh
Co Khonq
Con (r SL 66 775
= 841) 7,8 %
92,2
Chau SL 17 489
n = 506) 3,4 %
96,6
Kit qua d bang tren cho thay ty le con cua DTNC bi dj tat bam sinh cdn sdng la 7,8%o, ty le chau bi DTBS cdn song la 3,4%o.
Bang3.4: Phan loai dj tat d nhffng ngffdi thudc the he con, chau ciia DTNC mac DTBS (n = 79) He cd quan bi di tat
Da, cd - xLfdnq - l<hcfp Tam than i<inh Tim mach Mat TI^H, RHM Cd quan sinh due
Con trai 17
7 3 3 5 3
Con gai 12
9 3 2 1 1
Chau noi 3 2 0 2 0 0
Chau ngoai 2 3 3 0 1 1
Tong 34 21 9 7 7 5
Tdng sd ngu'di thugc thi he con, ehau cua cac DTNC hien dang mac DTBS la 79 ng&di. Cd 4 tr&dng hdp mac 2 loai di tat khac nhau. Nhdm di tat ve da cd xu'dng khdp la 34 ngu'di chiem ty le 43,0 %, di tat ve tam than kinh 26,6%o, ve tim maeh ll,4%o, di tat ve mat hoac ve tai mdi hgng, rang ham mat deu chiim 8,9%o. Kit qua bang tren cdn cho thay di tat d con trai nhieu hdn so vdi con gai va nhieu hdn so vdi chau ngi va chau ngoai
Bang3.5:So^n gap cac bien cd trong thdi gian mang thai, khi smh vdi vd, con gai, con dau DTNC So Tan
Olan 1 lan 2 lan
>3ian Tong
Vd SL 135 66 16 6 223
60,5 %
29,6 7,2 2,7 100
Con SL 138 32 6 1 177
gai 78,0 %
18,1 3,3 0,6 100
Con dau SL 11 6 0 0 28
78,6 %
21,4 0,0 0,0 100
Trong cac DTNC co 223/225 ngu&i co con va 2 ngirdi bi vo sinh. Ty ie ngirdi va, con gai, con dau da
gSp it nhat mot lan bien cd trong t<hi mang thai hoac sinh de la: 29,6%; 18,1 %; 21,4%; gap > 3 lan
ISn bien coglim dan: 2,7%; 0,6%; 0,0%.
Y HOC VIET NAM THANG 1 • SO 1/2014
Bang 3.6; So lan say thai ciia vd, con gar, con dau DTNC So lan
Olan 1 ian 2 S n
> 3 i n Tonq
V d SL 129 58 28 8 223
57,8
%
26,0 12,4 3,6 100
Con gai SL 145 22 7 3 177
81,9
%
12,4 4,0 1,7 100
Con d a u SL 22
4 2 0 28
78,6
%
14,3 7,1 0,0 100
So DTNC cd vd, con gai, con dau cd tien s& bi say thai 1 lan theo thiy tif lan Ittdt la: 26,0%o; 12,4%;
14,3%o; bj say thai 2 lan la: 12,4%o; 4,0%o; 7,1%; say thai td ba lan trd len la 3,6%o; 1,7%>; 0,0%o.
Sang 3,7: So ^ n de non, con chet chu sinh cua vd, con ga Sd fan
Olan l l a n 2 lan
> 3 l a n Tong
va
SL 183 29 9 2 223
82,2
%
12,9 4,0 0,9 100
Con gai SL 156 17 3 1 177
88,1
%
9,6 1,7 0,4 100
con dau BTNC Con d a u SL 24
1 3 0 28
85,7
%
3,6 10,7 0,0 100
So DTNC cd vd, con gal, con dau cd tien sd 1 lan de non, de con chet trong giai doan chu sinh ttieo thd tir lan idat la: 12,9%; 9,6%; 3,6%. Sd doi tddng cd den sdde non, de con chet td ba lan trd la chiem 0,9%; 0,'l%>; 0,0%.
Bang 3,8: So lan thai chet Itfu cua vd, con qai.
Sd ian Olan U a n 2 lan
> 3 lan Tong
V d SL 202 18 1 2 223
90,6
%
8,1 0,4 0,9 100
con dau BTNC Con gai SL 171 4 2 0 177
96,6
%
2,3 1,1 0,0 100
Con dau SL 27
0 1 0 28
96,4
%
0,0 3,6 0,0 100
SdDTNCcdvtd, con gai, con dau ed tien s& 1 lan bi thai chit Idu theo thif td lan iddt la 8,1%; 2,3%;
0,0%). Ng&di vd cua DTNC cd tien s&bj 2 lan thai chet l&u la 0,4%,; bj td 3 lan la 0,9%). Khong co tm gai, con dau cua DTNC bt thai luii td ba lan trd len.
IV. BAN LUAN
Doi tffdng trong nghien cu'u nay thupc dia ban huyen Kien Xffdng tinh Thai Binh, bao gom xa Quang Binh va xa Binh Nguyen vdi td'ng sd 225 ddi tffdng. Ca hai xa deu cd dieu kien dja ly va kinh te, xa hpi tffdng dffdng nhau vdi nen kinh te cd ban la nong nghiep, khong cd lang nghe nen_ cd the tranh dffdc nhffng tac dpng ciia d nhiem mdi trffdng lang nghe len sire khde con ngffdi. Doi tffdng nghien ciru d hai xa la tffdng nhau, do tuoi 61 - 70 chiem b/ le cao nhat (47,6%). Sd lieu nay hoan toan phii hdp vi vao nhUng nam 1960 - 1970 hp dang d dp tud'i thanh nien len dffdng nhap ngu theo tieng gpi thieng lieng ciia To quoc, So ngffdi d dd tuoi tren 70 chiem so Iffdng it hdn (18,2%) vi da cd mot sd
ngffdi sire khde yeu, do tan phe, do thffdng binh nang da mat. Hau het cac ddi tffdng la nam gifli, sau khi rdi quan ngu hp lai trd ve que hu'dng tiep tuc tham gia lao dong san xuat. So ddi tu'dng nghien ciru cd thdi gian di bp dpi tiep xiic viS chat ddc da cam trong khoang thdi gian tir nam 1961 den 1970 kha cao tren 50%, Day la thdiky quan dpi My rai xudng mien Nam Viet Nam hdn 72 trieu lit chat dpc hda hpc.
Anh hffdng ciia chat ddc da cam len cd the
con ngffdi da dffdc nhieu tac gia de cap nghien
ciru tren cac khia canh ve chi'nh tri, kinh te, xa
hpi, doi ngoai. Tinh cho tdi thang 4 nam 1988,
Bp Cffu chien binh My da nhan dffdc 92.276 bao
cao tff cac cffu chien bmh ve hau qua ciia d ^
da cam len sffc khde ciia ho nhffng trong so (&
Y HOC V l ^ NAM THANG 1 • SO 1/2014 chi CO 5.908 trffdng hdp dffdc chap nhan boi
thu'dng [ 4 ] .
Trong s6^ nhiTng ngffdi con cua cac DTNC hien dang mac benh cd 98 ngffdi con trai va 35 ngffdi con gai. Trong dd nhdm benh ve cd xffdng khdp chiem ty ie cao nhat (46,9% d con trai va 34,3% d con gai), tiep den la nhdm benh ve tieu hoa, thieu nang trf tue, cac nhdm benh^ khac chiem ty le thap hdn. Theo bao cao ciia To chffe Y te the qidi (2007) dioxin cd the anh hffdnq den cac ca nhan theo nhieu each khac nhau, pho bien nhat la di danq va khuyet tat bam sinh. Mdt sd tre em Viet Nam dffdc sinh ra khdnq mat, khdnq mui. Nhffnq du'a tre khac dffdc sinh ra ma khonq CO kha nanq di lai hoac hoat donq binh thffdnq.
Co tdi 150.000 tre em d Viet Nam bj tan tat do chat dpc da cam [ 2 ] , [ 5 ] .
Ket qua nghien ciTu d bang 3.3 cho thay ty le dj tat bam sinh d the he con cua doi tffdng nghien ciiu cdn sdng chiem 7,8% va d the he chau la 3,4%. Ket qua nay cao hdn so vdi ket qua nghien ciru ciia CDC tren cac cffu chien binh My da tham chien d Viet Nam (6,5% d the he con). Hdn nira the ky qua, nhan dan Viet Nam phai ganh chiu hau qua vd ciing nang ne ciia cupc chien tranh hda hpc do quan dpi My gay ra;
dp la cupc chien tranh hda iioc cd quy mo Idn nhat, gay hau qua tham khoe nhat trong Ijch sir loai ngffdi, Chat doc da eann da lam eho 4,8 trieu ngffdi Viet Nam bj phdi nhiem, hdn 3 trieu ngffdi la nan ntian, rat nhieu gia dinh cd 3 nan nhan trd len. Co gia dinh ca 15 ngffdi con deu la nan nhan, Va that dau long, dl chirng da cam da truyen sang the he thir tff, hang tram nghin n?n nhan da chet, hang tram ngan ngffdi dang vat lpn vdi benh tat hiem ngheo...
So liiu d bang 3.5 cho thay cae bien cd sinh san trong thdi gian mang thai va khi sinh de ciia vd, eon gai, eon dau doi tffdng nghien cffu, Cd 2/225 ngffdi vd khong cd kha nang sinh san. Cac bien cd sinh san bao gom say thai, thai chet Iffu, de non, con chet chu sinh, sinh con bj di tat bam sinh.,. Sd ngffdi vd, con gai, con dau da gap it nhat mdt lan cac bien eo trong khi mang thai h o k sinh de lan Iffdt ta: 29,6%; 1 8 , 1 % ; 21,4%;
gSp nhieu lan bien cd (tff ba lan trd len) giam dBn: 2,7%; 0,6%; 0,0%. Vo Tanh, Huynh Thj Kim Chi, Pham Ngoc Thai trong 2 nam 1986, 1987, thffc hien mpt dieu tra dieh te hoc ve bien CO sinh san d xa Uyen Hffng (1203 hd), mot xa bi rai nang trong chien tranh thugc huyen Tan Uyen va xa Chanh My (1087 hd), mot xa khdng bj rai thupc thi xa Thii Dau Mot. Ddi tffdng la cac e|p v^ chong cd eon va tuoi vd nhd hdn 60, ty le bien CO san khoa d xa bi rai cao hdn so vdi xa khdng bi rai (p < 0.05), trong do t i le dj tat bam sinh d xa bl rai 25/5618 so thai, xa khong bj rai la
5/4661 sd thai. Cac bien ed sinh san tang hdn ba lan ke tff nam 1965 (thdi gian rai chat dpc da cam) va giam sau nam 1975, nhffng van cao hdn trffdc 1965.
So lieu d bang 3,6 cho thay so doi tffdng nghien cu'u cd vd, con gai, con dau cd tien sir bi say thai 1 lan theo thff tff lan Iffdt la: 26,0%;
12,4%; 14,3Jo; bi say thai 2 lan la 12,4%; 4,0%;
7 , 1 % . Sd doi tffdng cd tien sff say thai tff ba lan trd len chiem ty Ie 3,6%; 1,7%; 0,0%. Ket qua d bang 3.7 cho thay sd ddi tffdng nghien cffu co vd, con gai, con dau ed tien sff 1 lan de non, de con chet trong glai doan chu sinh theo thir tff IBn Iffdt la 12,9%; 9,6%; 3,6%; cd 2 [an bi de non, de con chet la 4,0%; 1,7%; 10,7%. Sdddi tffdng cd tien sff de non, de con chet tff ba lan trd len chiem 0,9%; 0,4%; 0,0%, Le Thi Diem Hffdng, Nguyen Thi Ngoe Phffdng (1993) [3 ] da thu thap eae thong tin ve tinh hinh thai san, bao gom say thai tff nhien, thai chet Iffu, chffa trirng, ung thff rau va di tat bam sinh tai benh vien Tff Du t i i nam 1952-1981. Cac tac gia da so sanh tan so ciia chiing qua cac giai doan, trffdc trong va sau khi ngu'ng rai chat ddc da cam d mien Nam Viet Nam. Ket qua nghien ciru ve say thai ngau nhien gdi y mpt sff gia tang tan so manh trong thdi ky rai, sau do giam dan d thdi ky ngffng rai (1952:
0,45%; 1954: 14,76%, tang dan cao nhat vao nam 1976: 20,26% sau dd giam dan, tdi nam 1981: 10,94%), nhu'ng thdng tin ve tinh hinh chffa trffng va ung thff rau cho thay co sff gia tang dang ke tir nam 1976, thai Iffu tang vpt len eao (1,79%) tff nam 1977 va sau do khong giam.
DTBS ngay eang tang dan tff nam 1963, dinh eao nhat vao nam 1978 (0,24%),
V. KET LUAN
Ooi tffdng nghien cffu cd do tuoi tir 61 - 70 chiem 47,6%, tuoi dffdi 60 ehiem 34,2%; nam gidl ehiem 98,2%, Co tren 50% co tiep xiic vdi chat doc da cam d giai doan 1961 - 1970 va tren 40% d giai doan 1971 - 1975.
Ty le con, chau ddi tffdng nghien effu b\ dj tat bam sinh edn sdng la 7,8% va 3,4%. Nhdm di tSt ve da cO xffdng khdp ehiem t / ie 43,0%; ve tam than kinh chiem 26,6%, ve tim mach chiem 11,4%, dl tat ve mat hoac ve tai mui hong, rang ham mat deu ehiem 8,9%,
Ty le ngffdi vd, eon gal, eon dau ddi tffdng nghien ciru da gap it nhat mot lan bien co trong khi mang thai hoac sinh de theo thff tff ian Iffdt la: 29,6%; 1 8 , 1 % ; 21,4%, gap tff 3 lan cac bien cd sinh san trd len giam dan: 2,7%; 0,6%; 0,0%.
So ddi tffdng nghien ciru cd vd, con gai, con dau da bj say thai 1 lan thep thir tff lan iffdt la
Y HOC VIET NAM THANG 1 • SO 1/2014 26,0%; 12,4%; 14,3%; tff ba lan t r d len la
3,6%; 1,7%; 0,0%.
Trong sd nhii'ng ngffdi con ciia doi tffdng nghien cu'u hien dang mac benh, nhdm benh ve cd xu'dng khdp chiem ty le cao rihat (46,9% d eon trai va 34,3% d con gai), thieu nang t r i tue (24,5% va 17,1%), tieu hoa (23,5% va 14,3%).
TAI UEU T H A M KHAO
1. Le Cao Dai, Hoang Trong Quynh va CS (1993), Dieu tra tinh hinh bien ch&ng thai san va di tat bam smh d gia dinh c&u chien binh huyen Viei Yen, Ha Bac, chat diet cd trong chien tranh, tac hai lau dal ddi vdi con ng&dl va thien nhien, Hpi tiiao quoc te fan thff II 1993, tr.224 - 232.
2. Ho Dang Nguyen (1993), Tinh hinh thai san tai benh vien da khoa Tay Nmh, Hpi thao quoc te ve tac ddng lau dai ciia chien tranh hoa hgc 6 Viet Nam, Tap 3, 110- 114.
3. Nguyen Thj Ngoc Phu'dng, Le Thj Diem Hu'tJng (1983), Anh h&dng cua chat dgc hda hoc tren thai nghen, dieu tra dich te hgc tai hai dja phu'Ong d mien Nam Viet Nam, Hdi thao quoc te ve tac dong lau dai ciia chien tranh hda hoc d Viet Nam, Tap 3, tr.63- 68.
4. Agent Orange and the Vietnamese: the persistence of elevated dioxin levels in human tissues, American Journal of Public Health 1998 Apr; 85(4):516-522.
5. WoHd health Organization (2007), "Dioxin and Its Effects on Human Health," Fact Sheet 225, Geneva.
NGHIEN CU'U DIEN NAO CUA CONG N H A N LAI XE EU'U CHINH TRONG QUA TRINH LAO DONG
Trjnh Hoang Ha*
T O M TAT
Nghien ciTu cSt ngang dffpc tien hanh tren 40 Cong nhan iai xe Bffu chinh va 40 doi tffdng doi chffng trong nganh 8ffu Dien. Ket qua cho thay, co sff giam silt CO y nghia thdng ke mpt sd chi tieu tren dien nao do ciia Cong nhan lai xe Bffu chinh d trffdc ca so vdi sail ca lam viec: Bien dp song Alpha tff 17,68 ± 3,16 fiV giam con 14,45 ± 3,19 JJV; Chi so song Alpha tff 31,80 ± 5,12 % giam con 26,83 ± 6,26 %; Th6i gian dap tat song Alpha tir 0,052 ± 0,013 s keo dai len 0,072 ± 0,015 s; Thdi gian phuc hoi song Alpha tff 0,37 + 0,09 s keo dai len 0,56 + 0,012 s. Ket qua nghien ciru tren the hien sff cang thang than kinh tam ly va met moi trong qua trinh lao dpng ciia Cong nhan lai xe Bffu chinh.
Tu'khda: La] xe bffu chinh, dien nao dd, thdi gian dap tat song Alpha.
SUMMARY
STUDY ON ELECTROENCEPHALOGRAPHY OF POSTAL DRIVERS I N WORK SHIFTS
A cross-sectional study was conducted in 40 Postal dhvers and 40 controls working on Postal service. The results showed the statistically significant decrease of some EEC indicators of Postal drivers before work shift compared to after. Alpha wave dropped from 17.68 ± 3.16 nV to 14.45 ± 3.19 jiV; Alpha waves index
* Khoa Y D&dc Dai Hgc Qudc Gia HN Phan bien khoa hgc: GS.TS Tru'dng Viet Dung
decreased from 31.80 ± 5.12% to 26.83 ± 6.26%; the extinguishing time of Alpha waves decreased from 0.052 ± 0.013s to 0.072 + 0.015s; the recovery time of Alpha waves increased from 0.37 ± 0.09s to 0.56 ± 0.012s. The results revealed the stress status of Postal drivers in work shifts.
Keywords: Postal driver, EEC, extinguishing time of Alpha waves.
I. D^T V A N DE
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