Case 2 Flashcards
MOA of combined oral contraceptive pill
Oestrogen - inhibits FSH, therefore stops follicle development
Progesterone - inhibits LH, therefore stops ovulation. Also prevents sperm traffic since P causes vagina to have thicker mucus and be more acidic
ADRs of combined oral contraceptive pill
Thromboembolism Stroke/MI Increased risk of breast cancer Hypertension Skin pigmentation Weight gain Nausea Irregular bleeding Mood changes
Contraindications for combined oral contraceptive pill
Hx of thrombosis,
Risk factors for thromboembolism - obese, immobile, >35yrs, smoking, family hx
Heart disease with pulmonary hypertension/embolism
Migraines
Hx or family Hx of breast cancer
Methods of emergency contraception
Levonorgestrel - Inhibits GnRH release by binding to O and P receptors. Can be used up to 70 hours after unprotected sex.
Ulipristal - Inhibits ovulation by binding to progesterone receptor. Can be used up to 120 hours after unprotected sex.
IUD - more effective than levonorgestrel (unknown comparison to ulipristal). Can be used up to 120 hours after unprotected sex.
Methods of Contraception: Cap/Diaphragm
Inserted up to 2 hrs before sex
Left in for at least 6 hours after sex.
Can be used during period.
Used with spermicide gel.
Methods of Contraception: Depo Provera
Medroxyprogesterone injection, lasting 12-14wks
ADRs
Little or no bleeding, mood problems, bone density problems, long lasting effects (can be more than one year)
Methods of Contraception: Implanon
Etonergestrol Lasts 3 yrs 15-20% risk of abnormal bleeding Regain fertility very quickly after removal **Most effective form of contraception**
Methods of Contraception: Intrauterine System
Progesterone impregnated coil.
Progesterone creates an unfavourable environment for sperm - thick mucus and acidic
Lasts 5 yrs
Sometimes causes hormonal problems and irregular bleeding
Methods of Contraception: Intrauterine Device
Copper coil (copper is spermicidal)
Lasts 10yrs
Often causes heavy bleeding
Almost 100% effective
Effects of FSH
Development of primary follicles
Effects of LH
Ovulation
Stimulates theca cells to convert cholesterol to androgens
Effects of oestrogen
Inhibits FSH
Stimulates granulosa cells to convert androgens to oestrogens
Makes cervical mucus thinner and therefore easier for sperm to swim
Stimulates proliferation of stratum basalis to form stratum functionalis (thickening of endometrium) AND elongation of endometrial glands
Increased movement in uterine tubes
Increased clotting factors and platelet adhesion
Reduced bone loss
Effects of progesterone
Thickening of endometrium
Increased viscosity and acidity of cervical mucus
Stimulates uterine glands to secrete uterine milk (high in protein and glycogen)
Suppresses maternal immune response during pregnancy
Decreased uterine contractility
Inhibits lactation
LH and FSH are released from:
Anterior pituitary
Progesterone is secreted by…
Granulosa cells
How does the secondary follicle differ from primary?
Larger
More follicular/granulosa cells
Follicular fluid spaces have formed and will coalesce to form the antrum.
Theca layer differentiates into an interna and externa
How do theca interna and externa cells differ?
Theca interna - large, steroid hormone-producing cells
Theca externa - small, compact cells, continuous with stroma
Function of thecal cells
Production of steroid
Function of granulosa cells
Converts steroids into oestrogen
Peg cell
Non ciliated epithelial cell within uterine tube. Secretes a watery solution to nourish gametes.
LH surge occurs as a result of…
High levels of oestrogen
Formation of corpus luteum
LH stimulates proteolytic activity in theca externa and tunica albuginea - therefore breakdown of collagen
Corpus luteum appears yellow due to…
Fat
Formation of corpus albicans
Progesterone secretion by corpus luteum inhibits FSH and LH
After 10 days, leutolysis of CL
Corpus albicans is formed at day 25.
It is a fibrous, ovoid structure.
Cholesterol to Oestrogen
Theca cells convert cholesterol to androgens (stimulated by LH). Androgens converted to oestrogen by granulosa cells (stimulates by FSH and oestrogen)
Epithelium found in uterine tubes
Simple cuboidal
Secretory peg cells and ciliated
Epithelium found in ectocervix
Non keratinised, stratified squamous epithelium - protection from abrasion
Epithelium found in endocervix
Simple columnar epithelium. Contains crypts which secrete mucous.
Nervous innervation of Clitoris and Vestibule (Anterior vulva)
Anterior ilioinguinal branch of genitofemoral nerve.
Parasympathetic innervation from cavernous nerves of uterovaginal plexus
Nervous innervation of Posterior vulva
Posterior pudendal nerve and cutaneous nerve of thigh
Lymphatic drainage of vulva
Superficial inguinal lymph nodes
Venous drainage of vulva
Pudendal vein
Arterial supply of vulva
Pudendal artery
Epithelium found in vagina
Stratified squamous - protection, lubrication, stimulated by oestrogen to secrete glycogen
Arterial supply of vagina
Uterine and vaginal arteries branching from internal iliac vein
Venous drainage of vagina
Vaginal venous plexus, drains into internal iliac vein
Lymphatic drainage of vagina
Iliac and superficial inguinal lymph nodes
Nervous innervation of vagina
Superior portion - inferior uterovaginal plexus
Inferior portion - deep perineal branch of pudendal nerve
Tissues of the penis
Corpus cavernosum (x2) Corpus spongiosum (x1) contains urethra
Muscles involved in maintaining an erection
Ischiocavernosus - surrounds crura, contracts to push blood into corpus cavernosum.
Bulbospongiosus - associated with bulb of penis, contracts to empty urethra of residual semen and urine
Arterial supply of penis
Internal pudendal (branch of internal iliac)
Venous drainage of penis
Deep dorsal vein of penis - drains cavernous spaces into prostatic venous plexus
Superficial dorsal veins - drain superficial structures such as skin and cutaneous tissues
Sensory and sympathetic innervation of penis
Dorsal nerve (branch of pudendal nerve)
Parasympathetic innervation of penis
Cavernous nerves from prostatic plexus
Tunica Albuginea of testis
Divides testi into lobules
Nervous innervation of testis and epididymis
Testicular plexus - derived from renal and aortic plexus)
Arterial supply of testis and epididymis
Testicular arteries - branch from aorta
Venous drainage of testis and epididymis
Pampiniform plexus forms testicular veins
Layers of spermatic cord
Skin Dartos External spermatic fascia Cremaster muscle Internal spermatic fascia Tunica vaginalis - parietal and Visceral Testis
Some Damned Englishman Called It The Testis
Contents of spermatic cord
3x Arteries: Testicular, Cremasteric and artery to vas deferens
Pampiniform plexus and cremasteric vein
Lymph vessels (drain into paraaortic nodes (lumbar)
Vas deferens
Genital branch of genitofemoral nerve
Arterial supply of scrotum
Posterior scrotal artery (branch of internal pudendal artery)
Anterior scrotal artery (branch of external pudendal artery)
Venous drainage of scrotum
Scrotal vein - into external pudendal
Seminal Vesicles
Secrete 70% of semen
Alkaline fluid - neutralises vagina
Fructose - nourishment of sperm
Prostaglandins - suppress female immune response to foreign bodies
Clotting factors - keeps semen in female reproductive tract
Bulbourethral glands
Produce an alkaline lubricant to carry sperm
Prostate cancer
Peripheral zone (adjacent to rectum) - most common site of prostate cancer (carcinoma) Transitional zone - most common site of benign prostatic hyperplasia
Nervous innervation of prostate
Inferior hypogastric plexus
Venous drainage of prostate
Prostatic venous plexus
Arterial supply of prostate
Prostatic arteries
Function of dartos muscle
Temperature regulation - contracts to decrease surface area of scrotum, therefore reducing heat loss
Nervous innervation of anterolateral scrotum
Genital branch of genitofemoral nerve
Nervous innervation of anterior and posterior scrotum
Scrotal nerve
Nervous innervation of inferior scrotum
Perineal branches of posterior femoral cutaneous nerve (from sacral plexus)
Sertolli Cells
Tall, simple columnar epithelial cells
Provide nutrients to sperm
Phagocytose excess spermatoid cytoplasm
Have tight junctions between them, forming the blood-testis barrier
Leydig Cells
Intersitial cells, lying between tubules in the testis.
Have an eosinophilic, cholesterol containing cytoplasm
Secrete testosterone in response to LH
Direct inguinal hernia
Medial to epigastric vessels
Weakness in posterior wall of inguinal canal - inguinal contents emerges medial to deep ring
Seen in elderly with chronic conditions
Indirect inguinal hernia
Lateral to epigastric vessels
Inguinal contents pass through inguinal canal and exit through superficial inguinal ring
Seen in children and young people
Can descend into scrotum
Deep inguinal ring is located…
At the midpoint between ASIS and pubic tubercle
Symptoms of lower UTI
Dysuria (pain on urination) and nocturia
Smelly, cloudy, foul-smelling urine
Urgency
Frequency
(Suprapubic tenderness and haematuria in cystitis)
Symptoms of upper UTI
Loin pain Chills Fever Dysuria (pain on urination) Smelly, cloudy urine Urgency Frequency
Management of UTI
Encourage fluids inc. Cranberry Juice
Uncomplicated - Trimethoprim
Complicated - Amoxycillin +/- gentamycin