INTRODUCTION
?IT IS A HOLLOW MUSCULO-
--- Content provided by FirstRanker.com ---
MEMBRANOUS SAC WHICH ACTSAS A RESORVOIR FOR THE URINE.
? IT IS THE MOST ANTERIOR
--- Content provided by FirstRanker.com ---
ELEMENT OF THE PELVIC VISCERA.
?IT IS A SUBPERITONEAL ORGAN
--- Content provided by FirstRanker.com ---
AND HAS PARIETAL PERITONEUMONLY ON ITS SUPERIOR SURFACE.
?URINE ENTERS THE BLADDER VIA
--- Content provided by FirstRanker.com ---
URETERS AND EXITS VIA THE
URETHRA.
ANATOMICAL LOCATION
--- Content provided by FirstRanker.com ---
When "Empty" , the adult urinary bladder is located in the "Lesser
pelvis" lying partially superior to and partially postetior to the pubic
--- Content provided by FirstRanker.com ---
Bones.As the bladder fills it enters the "Greater Pelvis".
In some individuals, a full bladder may ascend to the level of the
"Umbilicus".
--- Content provided by FirstRanker.com ---
In infants and young children,the urinary bladder is in the abdomeneven when empty.
?An empty bladder is somewhat tetrahedral and oval when full.
--- Content provided by FirstRanker.com ---
?Has a base (fundus), neck, apex, a superior and two inferolateral
surfaces.
--- Content provided by FirstRanker.com ---
?Mean capacity is 220 ml.?150-250 ml collection lead to desire to micturition.
?Volume >500 ml caused pain due to its distension.
--- Content provided by FirstRanker.com ---
Superior surface-peritoneal
--- Content provided by FirstRanker.com ---
Base: upper part peritoneal
Other : non peritoneal
--- Content provided by FirstRanker.com ---
Surfaces:?Superior surface
?Posterior surface (Base)
--- Content provided by FirstRanker.com ---
?Inferolateralsurfaces
Apex-directed anteriorly
--- Content provided by FirstRanker.com ---
Neck-directed inferiorlyNeck is encircled by
--- Content provided by FirstRanker.com ---
prostate in MALES--- Content provided by FirstRanker.com ---
BASE OF BLADDER(Male)Base of urinary bladder of
--- Content provided by FirstRanker.com ---
male? Rectovesicle pouch
? Seminal vesicle
--- Content provided by FirstRanker.com ---
? Ampulla of vas deference
? Rectovesicle fascia
--- Content provided by FirstRanker.com ---
(Denonvillier's fascia)NECK OF BLADDER
--- Content provided by FirstRanker.com ---
?The neck of the bladder surrounds the origin of the urethra.
?The neck is the most inferior and also the most 'fixed' part of the bladder. In male it is
--- Content provided by FirstRanker.com ---
surrounded by prostate gland.?It is anchored into position by a pair of tough fibromuscular bands
?pubovesical ligaments in female
--- Content provided by FirstRanker.com ---
?puboprostatic ligaments in male.
SUPERIOR SURFACE OF BLADDER
--- Content provided by FirstRanker.com ---
Is triangular in shape,bounded on
each side by the lateral borders
--- Content provided by FirstRanker.com ---
extending from ureteric orificesposterolaterally to the apex
anteriorly &posteriorly by the
--- Content provided by FirstRanker.com ---
posterior border which joins the
ureteric orifices.
--- Content provided by FirstRanker.com ---
In the male, it is completely coveredby the peritoneum which separates
it from: coils of the ileum, and/or
--- Content provided by FirstRanker.com ---
sigmoid colon.Along its lateral
borders, the peritoneum is reflected
--- Content provided by FirstRanker.com ---
on to the pelvic walls.In the female, it is
--- Content provided by FirstRanker.com ---
covered by the
peritoneum except
--- Content provided by FirstRanker.com ---
for a small areanear the posterior
border, which is
--- Content provided by FirstRanker.com ---
related to the
supravaginal part
--- Content provided by FirstRanker.com ---
of the uterinecervix. Here the
peritoneum
--- Content provided by FirstRanker.com ---
is reflected on to
the uterine
--- Content provided by FirstRanker.com ---
isthmus formingvesicouterine
pouch.
--- Content provided by FirstRanker.com ---
INFEROLATERAL SURFACE OF BLADDER
These surfaces are separated from each other,
--- Content provided by FirstRanker.com ---
anteriorly
by the anterior border, and from the superior surface by
--- Content provided by FirstRanker.com ---
the lateral borders.The inferolateral surfaces are devoid of peritoneum
--- Content provided by FirstRanker.com ---
INFEROLATERAL SURFACE OF BLADDERMedial view of lower part of
lateral pelvic wall
--- Content provided by FirstRanker.com ---
RETROPUBIC SPACE(of RETZIUS)
--- Content provided by FirstRanker.com ---
RELATIONS OF THE BLADDERSUPPORTS OF THE BLADDER
--- Content provided by FirstRanker.com ---
False ligaments1. Median
umbilical fold
--- Content provided by FirstRanker.com ---
2. Medial
umbilical fold
--- Content provided by FirstRanker.com ---
3. Lateral falseligaments
4. Posterior
--- Content provided by FirstRanker.com ---
false
ligaments
SUPPORTS(contd..)
--- Content provided by FirstRanker.com ---
True Ligaments
?Puboprastatic or
--- Content provided by FirstRanker.com ---
Pubovesicle ligament?Lateral ligament
?Posterior ligament
--- Content provided by FirstRanker.com ---
?Median umbilical
ligament
--- Content provided by FirstRanker.com ---
INTERIOR OF BLADDER
coronal section.
--- Content provided by FirstRanker.com ---
TRIGONE OF URINARY BLADDER
It is smooth triangular part of
--- Content provided by FirstRanker.com ---
urinary bladder.Mucosal lining of trigone is
smooth and firmly attached to the
--- Content provided by FirstRanker.com ---
underlying wall of the bladder.
Formed by Right and left
--- Content provided by FirstRanker.com ---
ureteral orifices.Once the trigone of urinary
bladder is stretched to a certain
--- Content provided by FirstRanker.com ---
degree, siganl is sent to the brain
that bladder needs to be
--- Content provided by FirstRanker.com ---
emptied.URETERAL ORIFICES
--- Content provided by FirstRanker.com ---
These are Slit like openings through which ureters enter the bladder
on the posterolateral angles of the trigone of urinary bladder.
--- Content provided by FirstRanker.com ---
MERCIER'S BAR
It is a mucous membane present between the two ureteral
--- Content provided by FirstRanker.com ---
orifices.It is also called "InterUreteral Fold"
--- Content provided by FirstRanker.com ---
NECK OF URINARY BLADDERIt is the lowest portion of the bladder through which the "Urethra"
arises.
--- Content provided by FirstRanker.com ---
INTERNAL URETHRAL SPHINCTER
INTERNAL URETHRAL SPHINCTER
--- Content provided by FirstRanker.com ---
It is comprised of smooth muscle that is located at the junction of
urethra and the urinary bladder.
It is innervated by S2-S4 nerves of the pelvic plexus.
--- Content provided by FirstRanker.com ---
It's function is to constrict the internal urethra ,preventing the urineleakage and also prevents the Retrograde ejaculation (Ejaculatory Reflex
) of semen into the bladder.
--- Content provided by FirstRanker.com ---
DETRUSOR MUSCLE
It is also referred as " Muscularis Propria".
--- Content provided by FirstRanker.com ---
It is smooth muscle , found around the wall of bladder ,comprised of
inner and outer longitudinal, and middle circular layer.
--- Content provided by FirstRanker.com ---
This muscle is relaxing during accomulation of urine in the bladder,and contracts only during urination to void and empty the bladder.
ARTERIAL SUPPLY
--- Content provided by FirstRanker.com ---
Branches of internal iliac arteries.Superior vesical arteries supply anterosuperior parts of the
bladder.
--- Content provided by FirstRanker.com ---
In males, inferior vesical arteries supply the fundus and neck
of the bladder.
In females, vaginal arteries replace the inferior vesical
--- Content provided by FirstRanker.com ---
arteries and small branches to posteroinferior parts of the
bladder.
Obturator and inferior gluteal arteries also supply small
--- Content provided by FirstRanker.com ---
branches to the bladder.
--- Content provided by FirstRanker.com ---
VENOUS DRAINAGEThe veins draining from the bladder correspond to the arteries
.
--- Content provided by FirstRanker.com ---
Veins from the Vesical venous plexus drain into the internal iliacveins.
INNERVATION OF URINARY BLADDER
--- Content provided by FirstRanker.com ---
Pelvic Nerve (Parasympathetic nerve) comes from thesacral region of spinal cord. It is not under our control. It
causes contraction of the Detrusor muscle.
--- Content provided by FirstRanker.com ---
Pudendal nerve (Somatic nerve) causes contraction of
External Sphincter. We are firing pudendal nerve when we
--- Content provided by FirstRanker.com ---
are trying to hold our urine.Hypogastric nerve (Sympathetic nerve) causes relaxation of
Detrusor muscle and contraction of Internal sphincter.
--- Content provided by FirstRanker.com ---
Afferent Pelvic nerve that is sensory and comes from the
detrusor muscle. It is stimulated when the bladder is
--- Content provided by FirstRanker.com ---
stretched.LYMPHATIC DRAINAGE OF BLADDER
In both sexes, lymphatic vessels leave the superior
--- Content provided by FirstRanker.com ---
surface of the bladder and pass to the "External iliac
lymph nodes".
--- Content provided by FirstRanker.com ---
Those from fundus pass to the "Internal iliac lymphnodes".
Some vessels from the neck of bladder drain into the
--- Content provided by FirstRanker.com ---
"Sacral" to "Common iliac lymph nodes".
APPLIED ANATOMY
--- Content provided by FirstRanker.com ---
1. Trabeculated bladder- due to chronic
obstruction to the outflow of the urine by
--- Content provided by FirstRanker.com ---
enlarged prostate or stricture of the urethra.2. Suprapubic cystostomy-An extraperitoneal
approach of opening the cavity of the urinary
--- Content provided by FirstRanker.com ---
bladder.
APPLIED ANATOMY
3. Neurogenic bladder
--- Content provided by FirstRanker.com ---
a. Automatic reflex bladder.b. Autonomous bladder
Coverings of Kidney
--- Content provided by FirstRanker.com ---
?Fibrous capsule (true capsule)?Perinephric fat
?Renal fascia( fascia of Gerota)
--- Content provided by FirstRanker.com ---
?Paranephric fat
Renal Fascia or fascia of Gerota
?Consists of two layers
--- Content provided by FirstRanker.com ---
1.Anterior layer or fascia of Toldt
2.Posterior layer of Fascia of Zuckerkandl
--- Content provided by FirstRanker.com ---
?Laterally: Both layer fused and continued with the
fascia transversalis
--- Content provided by FirstRanker.com ---
?Medially: Layers do not fuse.