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Block 5 > Female reproductive anatomy > Flashcards

Female reproductive anatomy Flashcards

1
Q

What are the landmark features of the urogenital triangle?

A

Pubic symphysis + 2 ischial tuberosities

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2
Q

What are the landmark features of the anal triangle?

A

Coccyx + 2 ischial tuberosities

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3
Q

What muscles make up the pelvic floor?

A

Levator ani group (iliococcygeus, pubococcygeus, puborectalis) + Ischiococcygeus

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4
Q

What makes up the pelvic girdle?

A

Paired hip bones and sacrum - united by sacroiliac joints, pubic symphysis and strong ligaments

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5
Q

Where is the pelvis?

A

Space bound by pelvic girdle

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6
Q

Where is the pelvic inlet?

A

Divides the pelvis into 2 main regions (false or greater pelvis and true or lesser pelvis)

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7
Q

What is the false (greater) pelvis?

A

Lies above pelvic inlet (abdominal region of pelvic girdle)

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8
Q

What is the true (lesser) pelvis?

A

Lies below pelvic inlet - provides framework for birth canal in females

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9
Q

What are the 2 regions of the perineum?

A

Urogenital and anal triangles

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10
Q

How is the pelvis normally orientated?

A

60 degrees to the horizontal (so tilts anteriosuperiorly) meaning that the ASIS and pubic tubercles are in line with each other
Urogenital and anal triangles are also angled relative to each other (urogenital faces inferiorly, anal triangle faces posteroinferiorly)

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11
Q

Why are pelvic measurements not clinically useful?

A

Have limited clinical value in predicting ease of childbirth

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12
Q

What type of joint unites the pubic bones anteriorly?

A

Secondary cartilaginous (hyaline cartilage) - pubic symphysis

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13
Q

What is the route of weight transmission through the pelvis when sitting and what is the name of the condition that can be caused by too much sitting?

A

Weight transmission is through the ischial tuberosities

Too much sitting can cause ischial bursitis

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14
Q

What features distinguish a pelvis as being female?

A

Wider pubic arch
Shorter (and less inward pointing) ischial spines
Cylindrical pelvic cavity (wide pelvic inlet and outlets)
Relatively thinner bone

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15
Q

What are the terms used to define a male and female pelvis?

A 
Male = android 
Female = gynaecoid
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16
Q

What are the attachments of the sacrotuberous ligaments?

A

Sacral spine to ischial tuberosities

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17
Q

What are the attachments of the sacrospinous ligaments?

A

Sacral spine to ischial spine

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18
Q

What structures pass through the greater sciatic foramen?

A

Piriformis muscle
Superior and inferior gluteal nerves and vessels
Nerves of the sacral plexus

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19
Q

What structures pass through the lesser sciatic foramen?

A

Pudendal nerve
Internal pudendal vessels
Obturator Internus
Nerve to the obturator internus

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20
Q

What is the main route of venous drainage from the pelvic organs?

A

Venous drainage into internal iliac veins and then IVC

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21
Q

What is the clinical relevance of the venous drainage of the pelvic organs?

A

Can drain into the vertebral plexus allowing for metastatic cancer spread up spine (as the valves are veinless)

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22
Q

What are the anatomical of the ureters and its clinical relevance?

A

Ureters pass deep to uterine arteries and laterally to cervix - risk of damage during hysterectomy

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23
Q

What is the lymph drainage of the uterus?

A

Fundus, ovaries and uterine tubes drain to para-aortic nodes
Body of uterus drains to internal and external iliac lymph nodes

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24
Q

What is the sensory nerve supply to the uterus?

A

T10-L1/2

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25
Q

At what vertebral level would you insert an epidural?

A

L3/4

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26
Q

At what vertebral level would you insert a spinal nerve block?

A

L3/4 to L5/S1 into subarachnoid space

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27
Q

Where would you insert a caudal anaesthesia and what landmarks are used to find this?

A

Sacral Hiatus - inferior apex of an equilateral triangle measured between the two PSIS

28
Q

What does a pudendal nerve block anaesthetise?

A

Perineum
Distal vagina
Anal canal

29
Q

What is the function of the parametrial ligaments?

A

Support the uterus

30
Q

What ligaments provide support for the uterus?

A

Broad ligament

Parametrial ligaments: pubocervical, transverse cervical and sacrocervical

31
Q

What are the attachments of the parametrial ligaments?

A

Pubocervical = cervix to posterior surface of pubic symphysis
Transverse cervical = lateral cervix and lateral fornix of vagina to lateral pelvic wall
Sacrocervical = cervix to sacrum

32
Q

What sits anatomically between the uterus and the rectum and why is it clinically relevant?

A

Rectouterine pouch - most gravity dependent region so place where fluid/ blood/ pus will accumulate

33
Q

What is the nerve supply to the vagina?

A 
Proximal = parasympathetic S2-4 (pelvic splanchnic) 
Distal = somatic S2-4 (pudendal)
34
Q

What is the lymph drainage of the vagina and external genitalia?

A

Proximal vagina = internal and external iliac nodes

Distal vagina and external genitalia = superficial and deep inguinal nodes

35
Q

What is the normal anatomical arrangement of the uterus, cervix and vagina?

A

Anteflexed and anteverted

36
Q

What is the name of the procedure that can be used to test patency of the uterine tubes?

A

Hysterosalpingogram

37
Q

Where is the perineum?

A

Diamond shaped region below the pelvic floor between thighs - can be divided into urogenital and anal triangles

38
Q

Which measurements of the pelvis are the narrowest and widest points?

A 
Widest = transverse diameter
Narrowest = interspinous distance
39
Q

What muscles make up the pelvic floor?

A

Levator Ani group = Iliococcygeus, pubococcygeus and puborectalis
+ Ischiococcygeus

40
Q

Which nerve innervates the pelvic floor muscles?

A

S4 (+ some pudendal)

41
Q

Which muscle of the pelvic floor helps to maintain faecal continence and how?

A

Puborectalis - maintains anorectal angle to prevent incontinence

42
Q

What are the functions of the pelvic floor muscles?

A

Support pelvic organs
Prevent prolapse
Maintain continence

43
Q

What is the perineal body and what is its function?

A

Tough mass of fibre between external genitalia and anal canal - provides point of union between pelvic floor muscles and perineal membrane
Important for pelvic floor integrity, supports posterior vaginal wall and attachment point for anal sphincters

44
Q

What is the contents of the perineum in females?

A 
Crura of clitoris
Bulb of vestibule
Labia (majora and minora) 
Greater vestibular glands
Internal pudendal vessels and branches
Pudendal nerve and branches
Perineal membrane
45
Q

What is the contents of the perineum in males?

A 
Crura and bulb of penis 
Urethra
Scrotum and testes
Bulbourethral glands
Internal pudendal vessels and branches
Pudendal nerve and branches
Perineal membrane
46
Q

Where do the greater vestibular glands drain?

A

Into vestibule (at 5 and 7 o’clock positions relative to vaginal opening)

47
Q

What problems can occur in relation to the greater vestibular glands?

A

Can become inflamed, infected and form of cysts or abscesses

48
Q

What is the clitoris formed from?

A

Paired Corpora Cavernosa and bulb of vestibule

49
Q

What nerve supplies the clitoris?

A

Sensory from Pudendal (S2-4)

50
Q

What is an episiotomy?

A

Surgical incision of the perineum to widen the vaginal opening and facilitate delivery during childbirth
Most common incision is mediolateral

51
Q

What layers does a mediolateral episiotomy cut through?

A 
Posterior wall of vagina 
Transverse perineal muscles
Bulbospongiosus 
Perinal membrane 
Levator Ani 
Perineal skin and subcutaneous tissue
52
Q

What makes up the female reproductive tract?

A

Vagina, cervix, uterus, uterine tubes and ovaries

53
Q

What peritoneal pouches are found in females?

A 
Vesicouterine pouch (between bladder and uterus)
Rectouterine pouch (between uterus and rectum)
54
Q

What opening connects the vagina and the cervix?

A

External Os

55
Q

What lines the uterine cavity?

A

Endometrium

56
Q

What are the layers of the walls of the uterus?

A

Endometrium
Myometrium (thick, smooth muscle layer)
Perimetrium (outer, serosal layer)

57
Q

Where do the uterine tubes open into and what is the clinical relevance of this?

A

Peritoneal cavity - egg can implant in peritoneal cavity causing ectopic pregnancy

58
Q

What is the function of the fimbriae of the infundibulum?

A

Receive ovum at ovulation

59
Q

Where do the ovaries develop from?

A

Intermediate mesoderm on posterior abdominal wall (approx. L2)

60
Q

Which nerve runs close to the ovaries and can be impinged by ovarian pathology?

A

Obturator nerve - can be impinged causing pain/loss of sensation/ muscle wasting in medial thigh compartment

61
Q

Which part of the broad ligament suspends the ovaries?

A

Mesovarium

62
Q

What is contained within the suspensory ligament of the ovaries?

A

Ovarian vessels and lymphatics

63
Q

What does the round ligament of the uterus connect?

A

Ovaries to the uterus (then runs from uterus to labia majora via the inguinal canal)

64
Q

What are the round ligaments a remnant of?

A

Gubernaculum

65
Q

What are the three areas of the broad ligament?

A

Mesometrium (related to uterus)
Mesosalpinx (related to uterine tubes)
Mesovarian (related to ovaries)

66
Q

What is the broad ligament?

A

Large, double layered fold of peritoneum that surrounds and supports the uterus, uterine tubes and ovaries

67
Q

What is the paracolpium?

A

Fascia around the vagina which connects to the tendinous arch - important for supporting the vagina

Block 5 (25 decks)

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