Download - BAB X VASCULARISASI SSP.ppt
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VASCULARISASI
SSP
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VASCULARISASI SSP Vascularisasi SSP
o Berat SSP ± 2 % BB mendapat / memakai- 17 % COP- 20 % O2
- 40 % Glucosemelalui aliran darah.
o Kita bahas masing-masing Vascularisasi :1. Cerebrum2. Truncus Cerebri3. Cerebellum4. Medulla Spinalis
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Vascularisasi CEREBRUM 1
Terdiri dari Sistem ARTERI dan Sistem VENA
Sistem ARTERI
berasal dari 2 pasang Arteri Utama
○ A. CAROTIS INTERNA
○ A. VERTEBRALIS
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Vascularisasi CEREBRUM 2
A. CAROTIS INTERNA
o Masuk intracranial (cavum cranii) melalui FORAMEN CAROTICUM INTERNA
o Tembus Duramater pada medial SINUS CAVERNOSUS
o Masuk Spatium Subarachnoideum, memberi cabang cerebral, sbb:
1. A. COMMUNICANS POSTERIOR
2. A. CHOROIDEA ANTERIOR
3. A. CEREBRI ANTERIOR
4. A. CEREBRI MEDIA
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Vascularisasi CEREBRUM 3
A. VERTEBRALISo Dari foramen transversarium Vert. C. 1 tembus
Membrana Atlantooccipitalis post tembus Duramater masuk spat. Subarachnoideum (di bawah for. occ. magnum)
o Dilateroanterior Medulla Oblongata bersatu = V. BASILARIS (depan Pons)
o Batas Pons-Mesencephalom A. CEREBRI POSTERIOR (Sin + Dext)
Cabang-cabang lain A. Vertebralis + A. Basilaris, dibahas tersendiri (pada Vascularisasi Cerebellum, Truncus Cerebri, Medulla Spinalis)
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Vascularisasi CEREBRUM 4
Prinsip Vascularisasi Cerebrumo Dimulai dari CIRCULUS ARTERIOSUS WILLISI,
yang dibentuk:1. A. Cerebri Anterior2. A. Communicans Anterior3. A. Carotis Interna4. A. Communicans Posterior5. A. Cerebri Posterior
o Dari Circulus Arteriosus Willisi + lanjutan A. Cerebri Anterior, Media, Posterior akan bercabang menjadi cabang-cabang:
1. CORTICAL2. CENTRAL
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Vascularisasi CEREBRUM 5
Cabang CORTICAL
o Berjalan / terdapat pada permukaan CORTEX CEREBRI
o Vascularisasi Cortex Cerebri (Substantia Grisea) dan Substantia Alba superficial / subcortical
o Cabang-cabang Cortical A. Cerebri Anterior, Media dan Posterior Anastomose
o Anastomose tsb tidak adekwat (Functional end arteries)
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Vascularisasi CEREBRUM 6 Cabang CENTRAL
o Berasal dari / dipercabangkan dari- Circulus Arteriosus Willisi dan- Bagian Proximal A. Cerebri Ant, Med, Post
o Vascularisasi:- Struktur profunda Hemispherium Cerebri- Substantia Alba Profunda
o Tidak ada anastomose
o Suatu Anatomical End Arteries
o Masuk ke struktur profunda cerebri melalui Substantia perforata anterior + posterior (pada facies inferior cerebri)
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Vascularisasi CEREBRUM 7 SISTEM VENA
o Terdiri kelompok SUPERFICIAL dan PROFUNDA
o Kelompok Superficial- Drainage dari cortex cerebri, substantia alba Superficial /
Subcortical
- Bentuk Vena Cerebri Superior, media, inferior
- Terletak pada permukaan cortex cerebri
- Beranastomose satu sama lain
- Bermuara pada Sinus Sagittalis Superior, Sinus Cavernosus, sinus petrosus, sinus transversus
o Sistem Vena Cerebralis tidak punya Valvula
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Vascularisasi CEREBRUM 8 Kelompok Profunda
o Drainage dari substansia alba profunda, diencephalom, substantia grisea centralis
o Ada 3 Vena profunda utama:- V. Basalis- V. Cerebri Interna- V. Cerebri Magna
o V. Cerebri Magna = Vena terminalis dari Vena-Vena profunda Sinus Rectus
Ada Anastomose intracerebral : V. superf ↔ V. prof
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Vascularisasi CEREBRUM 9 Alur aliran Vena
V. Cerebri Superficialis V. Cerebri Profunda
↓ ↓ ↓
Sinus Sagit Sup Sinus Cavern Sinus Rectus
↓ ↓ ↓
Confluens Sinuum Sinus Petrosus Confluens Sinuum
↓
Sinus Transversus
↓
Sinus Sigmoideus
↓
V. Jugularis Interna
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Vascularisasi CEREBELLUM Berasal dari :
1. A. Cerebellaris Superior (cabang A. Basilaris)
2. A. Cerebellaris Ant-Inf (cabang A. Basilaris)
3. A. Cerebellaris Post-Inf (cabang A. Vertebralis)
Aliran Vena :1. Vv. Cerebellaris Sup + Inf lateralis → Sinus
Petrosus
2. Vv. Cerebellaris Sup + Inf medialis → Sinus Rectus
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Vascularisasi TRUNCUS CEREBRI MESENCEPHALON, dari cabang-cabang:
o A. Cerebri Post (cabang A. Basilaris)
o A. Cerebelli Sup (cabang A. Basilaris)
o A. Choroidea Ant. (cabang A. Carotis Interna)
o A. Communicans Post (cabang A. Cerebri Post)
PONS dan MEDULLA OBLONGATA, dari cabang2o A. Spinalis Ant (cabang A. Vertebralis)
o A. Spinalis Post (cabang A. Vertebralis)
o A. Cerebellaris Post-Inf (cabang A. Vertebralis)
o Cabang langsung A. Vertebralis
o Cabang langsung A. basilaris
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Vascularisasi MEDULLA SPINALIS Berasal dari:
o A. Spinalis Ant (1) – cabang A. Vertebraliso A. Spinalis Post (2) – cabang A. Vertebraliso A. Radicularis Ant (2-7) – cabang A. Spinalis / Segmentaliso A. Radicularis Post (10-23) – cabang A. Spinalis /
Segmentalis
Tidak seluruh A. Radicularis berkembang baik, biasanya ada 1 yang besar = A. ADAMKIEWICS
Aliran Vena, melalui:o V. Spinalis Ant (2)o V. Spinalis Post (2)o Vv. Radiculares
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