This document discusses the clinical aspects of veins, including:
1) The anatomy of the venous system in the leg, including deep and superficial veins.
2) The physiology of venous blood flow, which is governed by arterial pressure, the calf musculovenous pump, gravity, and venous valves.
3) Common vein disorders like venous thrombosis, thrombophlebitis, and chronic venous insufficiency which can result from valve damage or reflux and cause complications like ulceration.
2. Clinical anatomy of vein
Anatomy of the venous system of the leg
DEEP VEINS
POSTERIOR TIBIAL
ANTERIOR TIBIAL
PERONEAL
`
SOLEAL
GASTROC NEMIUS
POPLITEAL
FEMORAL
ILIAC
SUPERFICIAL VEINS
LONG SAPHENOUS (LSV)
SHORT SAPHENOUS (SSV)
3. PHYSIOLOGY OF VENOUS BLOOD FLOW
VENOUS RETURN FROM LEG IS GOVERNED BY:
Arterial pressure
Calf musculovenous pump
Gravity
Thoracic pump
Vis a tergo of adjoining muscles
Valves in veins
4. MUSCULOVENOUS PUMP
Foot and calf muscles act to
squeeze blood out of deep
veins.
One way valve allow only
upward and inward flow.
During muscle relaxation
blood is drawn inward thru
perforating veins.
5. VENOUS VALVULAR FUNCTION
VALVE LEAFLETS ALLOW
UNIDIRECTIONAL FLOW UPWARD
OR INWARD.
NONREFLUXING OF VALVES
MAJOR VALVES-OSTIAL VALVE
PRETERMINAL VALVE
7. Vein Disorders
Venous Thrombosis (Superficial and Deep Vein
Thrombosis),
Thrombophlebitis
Chronic Venous Insufficiency
Varicose Veins
8. Chronic Venous Insufficiency
Results from obstruction of venous valves in legs or
reflux of blood back through valves
Venous ulceration is serious complication
Pharmacological therapy is antibiotics for infections
Debridement to promote healing
Topical Therapy may be used with cleansing and
debridement
9. Stages of chronic venous insufficiency
0 - no symptoms;
1 - heavy feet syndrome;
2 - intermittent edema;
3 - persistent edema, hyper- or hypopigmentation,
lipodermatosclerosis, eczema;
4 - venous ulcer.
10. Causes
Primary
Theories of Aetiology:
Weak wall theory
Congenital valvular incompetence
Aggravating factors:
Female sex
High parity
Occupation requiring prolonged standing
Marked obesity
Constricting clothes
Estrogen intake
Deep venous thrombosis
11. Secondary
Anything that raises intra-abdominal pressure or raises pressure in
superficial/deep venous system
so:
Pregnancy
Abdominal/pelvic mass
Ascites
obesity
constipation
thrombosis of leg veins (DVT)
AV fistula
Vena cava thrombose
Large liver cysts
12. Varicose disease
Varicose disease of
subcutaneous veins is
their irreversible
dilation and elongation
occurring due to crude
pathological change of
venous walls and
valvular apparatus.
13. ANY RISK FACTOR INCREASED VENOUS PRESSURE
DILATION OF VEIN WALLS
STRECHING OF VALVES-VALVULAR INCOMPETENCE
REVERSAL OF BLOOD FLOW
FAILURE OF MUSCLES TO PUMP BLOOD
VEINS DISTEND,ELONGATE,TORTOUS,POUCHED,INELASTIC
AND FRIABLE
14. Surgical Intervention
INDICATED OR DONE FOR PREVENTION OR RELIEF OF EDEMA, FOR
RECURRENT LEG ULCERS OR PAIN OR FOR COSMETIC PURPOSES
VEIN LIGATION AND STRIPPING
THE GREAT SAPHENEOUS VEIN IS LIGATED (TIED) CLOSE TO THE
FEMORAL JUNCTION
THE VEINS ARE STRIPPED OUT THROUGH SMALL INCISIONS AT THE
GROIN, ABOVE & BELOW THE KNEE AND AT THE ANKLES.
STERILE DRESSING ARE PLACED OVER THE INCISIONS AND AN
ELASTIC BANDAGE EXTENDING FROM THE FOOT TO THE GROIN IS
FIRMLY APPLIED
15. NURSING CARE AFTER VEIN LIGATION & STRIPPING
Keep pt. flat on bed for first 4 hrs. after surgery,
elevate leg to promote venous return when lying or sitting
Medicate 30 mins. before ambulation and assist patient
Keep elastic bandage snug and intact, do not remove
bandage
Monitor for signs of bleeding, esp. on 1st post-op day
if there is bleeding, elevate the leg, apply pressure over
the wound and notify the surgeon
19. RISK FACTORS
Age
Gender
Height
left>right
Heredity
Pregnancy
Obesity and overweight
Posture
20. 25-50% of adult women
15-30% of adult men
Is it an industrialized country disease?
UK: 45 000 hospital admissions per year
21. Treatment complications
Major complications following VV surgery are relatively
rare
Up to 20% morbidity
Infection
Hematoma
Pain
Nerve damage
Saphenous nerve (LSV surgery)
Sural, peroneal nerve (SSV surgery)
Lymphatic leak - Venous thrombosis - Vascular injury
Recurrence
22. Deep Vein Thrombosis (DVT)
DVT: Blood clot in a vein
located deep in the muscles of
the legs, thighs, pelvis or
arms
DVT is the result of 3
principle factors
1. Reduce or stagnant
blood flow in deep veins
2. Injury to the blood
vessels wall
3. Increase clotting
activity (hyper-coagulability
22
or thrombophilia)
23. Risk of DVT
1. Immobilization
2. Recent surgery or trauma
3. The use of medication
4. Inherited or acquired hypercoagulability,
Note: Approximately 75-90% of DVT have at
least one established
risk factor
: Inherited thrombophilias can be identified
in 24-37% of patients
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24. SIGN AND SYMPTOMS
Leg pain or tenderness
Leg swelling
Increase wormth of one leg,change in skin color (redness)
Homans sign positive
24
25. Medical Management
Deep vein thrombosis
REQUIRES HOSPITALIZATION
BED REST W/ LEGS ELEVATED TO 15-20 DEGREES ABOVE
HEART LEVEL ( KNEES SLIGHTLY FLEXED, TRUNK HORIZONTAL
(HEAD MAY BE RAISED) TO PROMOTE VENOUS RETURN AND
HELP PREVENT FURTHER EMBOLI AND PREVENT EDEMA
APPLICATION OF WARM MOIST HEAT TO REDUCE PAIN,
PROMOTES VENOUS RETURN
ELASTIC STOCKING OR BANDAGE
ANTICOAGULANTS, INITIALLY WITH IV HEPARIN THEN
COUMADIN
FIBRINOLYTIC TO RESOLVE THE THROMBUS
VASODILATOR IF NEEDED TO CONTROL VESSEL SPASM AND
IMPROVE CIRCULATION
26. Nursing Assessment
characteristic of the pain
onset & duration of symptoms
history of thrombophlebitis or venous disorders
color & temp. of extremity
edema of calf of thigh - use a tape measure,
measure both legs for comparison
Identify areas of tenderness and any thrombosis
SURGERY
if the thrombus is recurrent and extensive or if
the pt. is at high risk for pulmonary embolism
Thrombectomy incising the common femoral vein
in the groin and extracting the clots
Vena caval interruption transvenous placement
of a grid or umbrella filter in the vena cava to block
the passage of emboli
27. Thrombophlebitis
inflammation of the veins caused by thrombus or
blood clot
Factors assoc. with the devt. of Thrombophlebitis
venous stasis
damage to the vessel wall
hypercoagulability of the blood oral
contraceptive use
common to hospitalized pts. , undergone major
surgery (pelvic or hip surgery), MI
Pathophysiology
develops in both the deep and superficial veins of
the lower extremity
deep veins femoral, popliteal, small calf veins
superficial veins saphenous vein
Thrombus form in the veins from accumulation
of platelets, fibrin, WBC and RBC
29. Main symptoms of thrombophlebitis
Edema of the extremity
The pains are localised in the
gastrocnemius muscles as a rule,
along the course of vascular
bundles
The skin of the extremity becomes
cyanotic.
30. Medical Management
Thrombophlebitis
bed rest with legs elevated
apply moist heat
NSAIDs ( Non steroidal
anti-inflammatory drugs) -
aspirin
31. Homans' sign
Pains in gastrocnemius muscle upon
dorsal flexing of the foot is
characteristic of thrombophlebitis of
profound veins of the extremity.
32. Classification of functional tests
1. Test enable one to judge the
condition of valvular apparatus
Trendelenburg-Trojanov's tests
Hackenbruch's
2. Test enable of insufficient
perforating veins
Pratt's test II
Scheins' test
Thalmann's test
3. Test enable the patency of
profound veins
Delbe-Pertez test (marching test)
Pratt-I test