Past zichlikdagi lipoprotein xolesterini (LDL-C)
Kod:8015
Tahlil ma'lumotlari
Tadqiqot usuli
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Kutilayotgan natija topshirish vaqti
1 kun
Maxsus tayyorlik
- Infants younger than 1 year: avoid feeding for 30–40 minutes before specimen collection.
- Children 1–5 years: avoid food for 2–3 hours before the test.
- Adolescents and adults: fast for 12 hours; drink only plain, noncarbonated water.
- Avoid vigorous physical activity and emotional stress for 30 minutes before collection.
- Do not smoke during the 30 minutes preceding the draw.
Qanday foydalanish
LDL xolesterin (LDL-C)ni aniqlash aterosklerotik yurak-qon tomir kasalligi xavfini taxmin qilishga yordam beradi va profilaktika hamda davolash bo'yicha qarorlarni qo'llab-quvvatlaydi. Natija turmush tarzini o'zgartirish choralarini va lipidni pasaytiruvchi terapiyani boshlash hamda sozlashga yo'naltiradi va vaqt o'tishi bilan LDL-C maqsad ko'rsatkichlariga erishishni kuzatishda qo'llaniladi. Ushbu analiz, shuningdek, hayvon yog'larini cheklovchi parhezning ta'sirini baholash va farmakologik davolash vaqtida lipid o'zgarishlarini hujjatlashtirish uchun ishlatiladi. Klinik so'rov va hisobotlarda "past zichlikdagi lipoprotein xolesterini" va "LDL-C" kabi sinonimlar keng qo'llaniladi.
Cheklovlar
Xolesterin hujayra membranalariga kiritiladigan muhim lipid spirt bo'lib, steroid gormonlar va o't kislotalari uchun prekursor vazifasini bajaradi. Xolesterin suvda erimaganligi sababli u apolipoproteinlar va lipidlardan tarkib topgan lipoprotein zarralari tarkibida qon aylanishida tashiladi. Asosiy sinflar: juda past zichlikdagi lipoproteinlar (VLDL), past zichlikdagi lipoproteinlar (LDL) va yuqori zichlikdagi lipoproteinlar (HDL). Ortiqcha LDL xolesterin arterial devorlarda blyashka (ateroma) hosil bo'lishini kuchaytiradi, bu qon oqimini cheklaydi va koronar yurak kasalligi hamda ishemik insult xavfini oshiradi. Jigar sintezi xolesterin ehtiyojining asosiy qismini ta'minlaydi, qo'shimcha miqdor hayvon yog'laridan iborat ratsiondan olinadi; irsiy moyillik va hayvon yog'larini ko'p iste'mol qilish LDL-C ni patologik darajalarga olib borishi mumkin. LDL xolesterin odatda umumiy xolesterin, HDL xolesterin va trigliseridlar asosida Fridvald formulasi yordamida lipid profilidan hisoblab chiqariladi. Trigliseridlar ancha yuqori bo'lganda (> 10 mmol/L) yoki yog'li ovqatdan so'ng hisoblangan qiymat ishonchsiz bo'ladi; bunday holatlarda LDL-C to'g'ridan-to'g'ri fermentativ fotometrik usul bilan o'lchanishi lozim. Test klinik jihatdan barqaror holatda bajarilishi kerak; o'tkir kasallik, miokard infarkti yoki jarrohlikdan keyin lipidlarni o'lchashni kamida 6 hafta kechiktirish zarur. Natijalar an'anaviy yoki SI birliklarida berilishi mumkin. Konversiya koeffitsiyentlari: mmol/L × 38.66 = mg/dL; mmol/L × 0.3866 = g/L; mg/dL × 0.0259 = mmol/L.
| Referens oraliq |
| ||||
|---|---|---|---|---|---|
| Ko'rsatmalar | Cardiovascular risk stratification and atherosclerosis risk assessment, Evaluation of hypercholesterolemia to determine the contributing lipoprotein fraction(s) as part of a lipid panel, Baseline and follow-up testing when initiating or adjusting lipid-lowering therapy or dietary fat restriction, Routine adult screening: individuals aged 20 years and older at least once every 5 years, More frequent monitoring when lipid targets are being pursued with lifestyle or medications, Presence of cardiovascular risk factors: tobacco use; male age >45 years or female age >55 years; hypertension (≥140/90 mm Hg); family history of premature atherosclerotic cardiovascular disease (male first-degree relative <55 years or female <65 years); established coronary artery disease, prior myocardial infarction, or stroke; diabetes mellitus; obesity; high dietary intake of animal fats; low physical activity; excessive alcohol use, Pediatric selective screening (age 2–10 years) when there is a family history of hypercholesterolemia or early-onset heart disease |
Natija og'ishlarining mumkin sabablari
Oshgan daraja
- anabolic steroids
- androgens
- corticosteroids
- diet high in animal fats
- pregnancy
- prolonged fasting
- sampling in standing position
- smoking
Pasaygan daraja
- allopurinol
- antifungal agents
- cholestyramine
- clofibrate
- colchicine
- erythromycin
- estrogens
- low-cholesterol, low saturated fat, high polyunsaturated fat diet
- statins
- supine position
- vigorous physical activity
Namunangiz talablari
| Namunangiz | Zardob |
|---|---|
| Container | Oltin/yo'lbars qopqoqli probirka (SST, gel ajratgich) |