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Intermediate Filaments:
KERATIN
DESMIN
VIMENTIN
NEUROFILAMENTS
GLIAL FIBILLARY ACID PROTEINS (GFAP)
- KERATIN EPITEHILAIL (HAIR/NAILS)
- DESMIN MUSCLE
- VIMENTIN CONNECTIVE TISSUE
- NEUROFILAMENTS NEURONS
- GFAP NEUROGLIA
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Phospholipase C act via:
1. Protein Kinase A
2. Protein Kinase C
3. Protein Kinase G
Protein Kinase C
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Protein Kinase C Dependent:
- HaV1M&M
- H1, Alpha1, V1, M1, M2 and Angiotensin II
Increase Ca and DAG
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Protein Kinse A dependent:
- MAD2s Lower cAMP M2,A2, D2
- B1,B2, D1, H2,V2, Glucagon and PH Increase CMP
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ABO blood type antigens are
1. glycolipids
2. glycoprtoiens
- Glycolipids
- HLA type antigens are glycoproteins.
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Transcription occurs in
5to 3 direction or 3 to 5 direction
5 to 3 (rem: Cryptology goes backward)
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Phases of Cell Cycle:
- G1 : Longest, Variable, determine cell cycle length
- S: synthesis of protein, DNA duplication: Sensitive to UV,carcinogen
- G2: growth last check before actual divisioin
- M: Mitosis
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Mitosis Phases:
- Prophase- centromere attachment, spindle formation, nucleus disappears
- Metaphase- chromosome alignment
- Anaphase-chromosome pull apart
- Telophase- separate nucleus re-forms around set of chromosomes
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Glycolysis
Occurs in cytoplasm. 1 glucose molecule generates 2 ATP and 2 pyruvate molecules
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Kerb Cycle
inner matrix of mitrochondria, 2 pyruvate generates 36 ATP
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Warfarin
WEPT: Warfarin, Extrinsic, PT
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Factors Increase Platelet aggregation:
Ca, ADP, TXA2, Histamin, 5HT, Alpha2
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Factors Decrease Platelet aggregation
PGI2, cAMP, ASa, Ticlopidine, Plavix, Dipyaradimole
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Vitamin K dependent factors
- II, VII, IX, X; protiens C and S
- Vitamin K take 6 hours to effect
- FFP acts immediate and last 6 hours
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Normal Half Life:
RBC
Platelets
PMN
- RBC 120daysPlatelets 7days
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PMN 1-2 days
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Labile factors
- V and VIIIactivity lost in stored blood, activity not lost in FFP
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PT measures:
II, V, VII, and X; fibrinogen; best for liver synthetic function
contrast to II, VII, IX, and X of Vit K
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PTT measure
all factors except VII and XIII (thus do not pick up factor VII deficiency); also measure fibrinogen
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MCC of surgical bleeding
Incomplete Hemostasis
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Prostacyclin (PGI2):
Release
Action
- From Endothelium
- Decreases platelet aggregation and promotes vasodilation
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DPL Positive If
- >10cc blood
- >100,000 RBCs/cc
- food particles, bile, bacteria
- >500 WBC/cc
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ICP parameter in trauma
Normal 10. >20 need treatment
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Cerebral perfusion pressure
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Bladder pressure for Abdominal compartment syndrome
>25
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Na/K pump
3 Na out/ 2 K in
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ABO vs HLA antigen
- ABO> glycolipid
- HLA > Glycoprotein
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Cell cycle
- G1, most variable, determine cell cycle length, growth factor acts
- S (synthesis, chromosomal duplication)
- G2
- M (mitosis), mose sensitive to chemo agents
- G0 (quisient)
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Glycolyis
2 ATP , 2 puyruvate
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Protein kinase C
- ativated by Calcium and DAG
- HAVe1 M&M angioII
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Protein Kinase A
- activated by cAmp
- MAD2s, PTH, Glucagon
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Increase Platelet Aggregation
TXA2, ADP, 5HT, Ca, Histamine, Alpha2
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Decrease Platelet Aggregation
PGI2, cAMP, ASA, Ticlopidine, Plavix, Dipyradimole
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Thrombin
- Key to coagulation
- Covent fibrinogen to fibrin and fibrin split products
- Activate factors V and VIII
- Activate platelets
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Antithrombin III
- Key to anticoagulation
- Binds and inhibts thrombin
- Inthibit factors IX, X, XI
- Heparin bind AT-III
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Function:
IL4
IL2
- IL4 cause B cell maturation into plasma cell
- IL2 cause maturation of cytotoxic T cell, used in tx of melanoma
- Both are release by Helper T-cell (CD4)
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MHC Class
- MHC Class 1 (A,B,C)CD8 cell acivation
- present on all nucleated cells
- single chain with 5 domain
- Target for cytotoxic T cells
- MHC Class II (DR, DP and DQ)CD4 cell activation
- present on B cells, dendrites, monocytes and antigen presenting cells
- 2 chain with 4 domain each
- Activator of helper T cell
- stimulate Antibody formation
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INTERLUKINS
- IL-1 HOT
- IL-2 stimulate Tcell
- IL-3 stimulate bone marrow
- IL-4 Stimulate B Cell to produce antibodies
- IL-5 Promote IgA
- IL-6 Acute phase reactant
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Anaphylotoxins
C3a, C4a, C5a
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Membrane attack complex
C5b-9b
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LEUKOTRINES
LTC4, LTD4, LTE4- slow reacting substances of anaphylaxis: bronchoconstriction, vasoconstrictioni, inc. permeability
LTB4 - Chemotactic
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Order of cell arival in wound
- Platelets
- PMNs
- Macrophages
- Fibroblasts
- Lymphocytes
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Predominant cell type in healing
- 0-2 - PMNs
- 3-4 - macrophages
- Days 5 and on - fibroblasts
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Platelet granules
- Alpha granule
- Platelet factor 4 - aggregation (HIT igbG antibody against PF4)
- Beta thrombomodulin - binds thrombin
- PDGF- chemoattract
- TGF-beta - key compponent of tissue repair
- Dense granules
- adenosine, serotonin and calcium
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Collagen types
- I - MC type, skin bone, tendons. primary collagen in healed wounds
- II - Car2lage
- III- haeling wound, in blood vessels, skin, KELOID
- IV- Basement membrane
- V- cornea
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GCS
 - <14 head CT <10 intubation <8 ICP monitor
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Neck Zone Trauma management
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Approach to esophageal injury
- Neck - left side
- Upper 2/3- right thoracotomy
- Lower 1/3- left thoracotomy
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PELVIC FRACTURE CLASSIFICATION
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Bacteriostatic Antibiotics
Clindamycin, Chloramphenicol, Erythromycin (macrolides), Linezolid, Tetracycline, Tegacycline, Bactrim.
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Antibiotic 30 vs 80 ribosome blockers
- Buy AT 30
- Aminoglycoside, Tetracycline
- CEL at 50
- Clindamycin, Erythromycin (macrolides), Lincomycin
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Beta-Lactamase Inhibitor
- Calvulinic Acid
- Sulbactam
- Tazobactam
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Anti-pseudomonal Coverage
- Antipseudomonal pencillins (ticarcillin/piperacillin aka Timentin/Zosyn)
- 3rd Generation cephalosporins
- Meropenem/Imepenem
- Aminoglycoside
- Flouroquinolones
Double cover pseudomonas
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Antibiotic Common side Effects.
Ceftriaxone
Carbapnem
Aminoglycoside
Vancomycin
Bactrim
Clindamycin
Flagyl
- Ceftriaxone- Cholestasis
- Carbapnem- Seizure
- Aminoglycoside- Nephrotoxicity/ototoxicity
- Vancomycin- Redman syndrome, Nephrotoxicity
- Bactrim- Hemolytic An, Steven johnson
- Clindamycin- C Diff colitis
- Flagyl- Disulfiram like reaction, teratogenic, peripheral neuropathy
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What is Health care associted MRSA?
MRSA infection occur >48 hour following hospitalization or MRSA infection occur outside of hospital within 12 month exposure to healthcare (h/o surgery, hospitalization, dialysis or residence in long term care facility)
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Coverage for MRSA?
- VANCOMYCIN drug of Choice
- LInezoid, Synercid second line
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ANTI-TB DRUG SIDE EFFECTS
- INH- Hepatotoxicity, B6 deficiency
- Rifampin- Hepatototoxicity
- Pyrazinamide- Gout
- Ethambutol- Retrobulbar Neuritis
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Effective Against Enterococccus
Vanco, Timentin/Zosyn, Ampicillin/amoxicillin, gent with ampicillin
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DRUG MOA
quinolone
rifampin
metronidazole
sulfonamide
trimethoprim
acyclovir
isoniazid
amphotericin
- quinolone -inhibit DNA Gyrase
- rifampin- inhibit RNA polymerase
- metronidazole- produce o2 radiclar break DNA
- sulfonamide- PABA analogue
- trimethoprim- inhibit dihydrofolate reductase
- acyclovir- inhibit DNA polymerase
- isoniazid- inhibit mycolic acid
- amphotericin-bind sterols in wall and alter membrane permeability
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Classification of Diverticulitis
- Stage I
- Diverticulitis with associated pericolic abscess
- Stage II
- Diverticulitis associated with distant abscess (retroperitoneal or pelvic)
- Stage III
- Diverticulitis associated with purulent peritonitis
- Stage IV
- Diverticulitis associated with fecal peritonitis
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Hinche classification subdivision
Stage I has been subdivided into Ia that is pericolic inflammation. Stage Ib is diverticulitis associated with pericolic abscess. Stage IIa is distant abscess amenable to percutaneous drainage.Stage IIb is complex abscess with or without fistula.
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When should you get surgery after diverticulitis?
Elective resection has generally been offered to patients who have suffered two attacks of acute diverticulitis in a short period of time, but recommendations have ranged from one to four episodes. Data suggest recurrences of up to 67%, with higher morbidity (up to 60%) and mortality associated with recurrent diverticulitis particularly after two episodes.
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Accuracy of TRUS for Rectal cancer?
TRUS is superior for T staging of rectal cancer. The range of the accuracy of TRUS is 80–95% compared with 65–75% for CT scan, 75–85% for MRI, and 62% for DRE.
TRUS understages more frequently than overstages the primary rectal tumor. However, TRUS understages the cancer less often than CT scan (15 vs 39%)
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PET for rectal Cancer
(FDG-PET) is effective in assessing the extent of pathologic response of primary rectal cancer to preoperative chemoradiation and may predict long-term outcome.
that PET scans not be used routinely in the standard workup of a rectal cancer.
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Stage of Rectal cancer
In stage I disease, the tumor may invade into the muscularis propria. In stage II disease, the tumor invades completely through this layer into the perirectal fat (T3) or adjacent organs (T4). Any lymph node metastasis represents stage III disease, and metastatic spread denotes stage IV disease.
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TNM of rectal cancer
- T1- Tumor invades submucosa
- T2-Tumor invades muscularis propria
- T3- Tumor invades through muscularis propria into the subserosa or into nonperitonealized pericolic or perirectal tissues
- T4a- Tumor perforates visceral peritoneum
- T4b - Tumor directly invades other organs or structures
Regional lymph nodes (N)
- N1 - Metastasis in 1–3 regional lymph nodes
- N1a - Metastasis in 1 regional lymph node
- N1b - Metastasis in 2–3 regional lymph nodes
- N1c Tumor deposit(s) in the subserosa, mesentery, or nonperitonealized pericolic or perirectal tissues without regional nodal metastasis
- N2- Metastasis in 4 or more regional lymph nodes
- N2a -Metastasis in 4–6 regional lymph nodes
- N2b -Metastasis in 7 or more regional lymph nodes
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