Week 0/15 - GP Flashcards
What should be asked when taking a psychosexual history?
- Sexual function - onset + duration of erectile problems (able to manage full/partial erection)
- Quality of erections - nocturnal and morning spontaneous erections?
- Situations present - attempted intercourse w/ regular partner or different, self or erotic stimuli?
- Previous history of ED, treatments?
- Sexual orientation/gender identity
- Past/current sexual relationships
- Current emotional status
What questions should be asked when a patient presents with ED?
- Psychosexual history
- CVS/diabetes - detailed history of CV symptoms or symptoms suggestive of diabetes e.g. thirst, polyuria, polydipsia
- Genitourinary - clarify there are no lower urinary tract symptoms which may be linked e.g. hesitancy, urgency, haematuria etc.
What resources are available for taking a history for ED?
Downloadable questionnaires available e.g. International Index of Erectile Dysfunction, Sexual Inventory for Men
What examinations would be performed in a patient presenting with ED?
- General - BP, pulse, BMI (assess cardiac risk factors)
- External genitalia -
- Penile abnormalities - premalignant or malignant conditions
- Phimosis (foreskin too tight to be pulled back over glans penis)
- Peyronie’s disease (scar tissue plaque forms inside penis, causes bent erect penis)
- Signs of secondary sexual characteristics - testicular size/testicular consistency
- Digital rectal examination
- Prostate exam in older men (>50)
- History of prostate cancer
- Prostate symptoms
- Ejaculatory dysfunction - caused by enlarged prostate
What investigations should be done in a patient presenting with ED?
- Fasting glucose or HbA1c - assess glycaemic control
- Fasting lipids - calculate 10yr CVD risk
- LFTs including GGT
- Total testosterone - requires sample between 8am-11am
- Additional tests - LSH, FH, prolactin, thyroid function tests - if testosterone low
- Consider PSE if >50/enlarged prostate on DRE
- Check level prior to initiating testosterone therapy
How common is erectile dysfunction?
50-55% of men 40-70 y/o
Define erectile dysfunction
Inability to achieve/maintain a penile erection adequate for satisfactory sexual intercourse
How is CVD linked to ED?
Endothelial dysfunction in CVD leads to impaired smooth muscle relaxation within the penis
What does the Princeton consensus propose?
Assessing men with CVD for exercise ability to ensure they can meet the demands of sexual activity
List the causes of ED
Classified as psychogenic or organic, commonly has overlap
- Psychogenic - no physiological or neurovascular condition identified
- About 10% of ED cases
- Due to stress in a relationship, performance anxiety, psychological problem
- Organic - 90% of men attributed to central mechanism of endothelial dysfunction
- CVD - 40%
- Diabetes - 33%
- Hormonal/drugs - 11%
- Neurological disorders - 10% e.g. MS, Parkinson’s, spinal cord trauma
- Pelvic surgery/trauma - 3-5%
- Anatomical abnormalities in 1-3% e.g. phimosis, Peyronie’s disease, short frenulum
List common drugs which cause ED
- Antidepressants - SSRIs (citalopram/fluoxetine), MAOIs (phenelzine), TCAs (amitriptyline)
- Antihypertensives - beta-blockers, verapamil, methyldopa, clonidine
- Antiarrhythmics - digoxin, amiodarone
- Diuretics - spironolactone, thiazide
- Hormonal - anti-androgens (cyproterone acetate), LHRHs (goserelin), 5 alpha reductase inhibitors (finasteride), corticosteroids, ketoconazole
- H2 receptor antagonists - cimetideine, ranitidine
- Recreational drugs - alcohol, marijuana, cocaine
How can psychogenic causes of ED be differentiated from organic causes of ED?
- Symptoms suggestive of psychogenic causes of ED
- Younger age, lack of medical history/risk factors
- Sudden onset
- Decreased libido
- Spontaneous erections
- Symptoms present at specific time e.g. with partner
- Major life events
- Relationship changes
- Previous psychological history
- Symptoms suggestive of organic cause of ED
- Older age
- Gradual onset
- Normal libido
- Loss of nocturnal and early morning erections
- Present in all situations - with partner/or stimuli
- Risk factors for CVD/DM
What is the management plan for a patient with ED?
- Identify and treat reversible causes of ED
- Testosterone deficiency - establish cause of hypogonadism
- Hyperthyroid/hyperprolactinaemia
- Drug induced- change or withdraw medicine, caution in those on anti-psychotics as this requires psychiatric review
- Sexual problems - consider patient referral to psychosexual counselling or relationship counselling for couples
- Lifestyle modifications
- Dietary changes
- Smoking cessation
- Reduction in alcohol - encourage ‘drink free’ nights
- Increase exercise as BMI raised/systolic BP elevated
- Suggest counselling or mindfulness to help w stress due to work
- If had pre-existing CVD need to assess risk of sexual activity (Princeton consensus) - requires same effort as gardening
- Drug therapy?
What is the first line drug-therapy for ED
- PDE-5 inhibitors are first-line treatment for ED except if there are contraindications
- E.g. Sildenafil (Viagra)
Describe the mode of action of PDE-5 inhibitors
- Selective inhibitors of phosphodiesterase type 5 (PDE5)
- Inhibit cGMP-specific PDE5 (breaks down cGMP)
- cGMP promotes smooth muscle relaxation, increased blood flow to penis, leading to compression of the subtunical venous plexus resulting in penile erection
- Inhibiting PDE5 maintains concentrations of cGMP necessary for achieving and maintaining erections
What are the contraindications for PDE-5 inhibitors
- Nitrates and guanylate cyclase stimulators e.g. Riociguat (for pulmonary arterial hypertension)
- Severe/unstable heart disease
- Non-arteritic anterior ischaemic optic neuropathy (NAION)
- Hypotension (systolic below 90/50 mmHg)
- Unstable angina or angina occurring during sexual intercourse
- Recent stroke or MI
What are the cautions when prescribing PDE5 inhibitors?
- CVD risk stratify according to Princeton consensus II
- Left ventricular outflow obstruction e.g. aortic stenosis
- Anatomical penile abnormalities e.g. Peyronie’s
- Predisposition to priapism e.g. Sickle-cell disease
- Varendafil - elderly men and men with active peptic ulceration, bleeding disorders, long QT interval
- Sildenafil and Avanafil - active peptic ulceration or bleeding disorders
Describe the dosing regimen of commonly prescribed PDE5 inhibitors
- Sildenafil ‘viagra’
- 50mg taken as needed approximately one hour before sexual activity
- Max dose 100mg daily
- Duration of action - 4-5 hours
- Tadalafil ‘cialis’
- 10mg (with or without food) taken at least 30 minutes prior to sexual activity
- Max dose 20mg daily.
- Frequent sexual activity (more than twice weekly) can be prescribed at doses of 2.5 and 5mg tablets for daily use
- Duration of action - up to 36 hours
- Vardenafil ‘levitra’
- 10mg taken as needed, 25-60 minutes before sexual activity
- Max dose is 20mg
- Duration of action 4-5 hours
- Avanafil ‘spedra’
- 100mg dose 15-30 minutes prior to sexual activity
- Max dose is 200mg
- Duration of action - up to 6 hours
List the common and uncommon side effects of PDE5 inhibitors
Common
- Backpain, dyspepsia, flushing, migraine, myalgia, nasal congestion, dizziness, nausea, vomiting
Uncommon
- Visual disturbances, including non-arteritic anterior ischaemic optic neuropathy, stop with immediate effect if sudden visual impairment occurs
- Sudden hearing loss
- Priapism (persistent erection). Warn to seek advice if erection lasts longer than 4 hours.
Should patients buy ED therapy on the internet?
- Advise extreme caution - many counterfeit medications in circulation
- Overuse of medication to improve sexual performance is common and it is important to monitor prescription requests from patients
- Can be purchased directly from a pharmacy
Which patients are exempt from payment for PDE5 inhibitors on the NHS?
- Diabetics
- Parkinson’s disease
- MS
- Polio
- Single-gene neurological disease e.g. Huntington’s
- Spinal cord injury
- Spina bifida
- Renal dialysis
- Radial pelvic surgery
- Prostate cancer
- Treatment initiated before 1998
- Severe stress secondary to ED - as judged by specialist
If symptoms of ED do not improve following prescription of a PDE5 inhibitor and lifestyle modification, what should be done next?
- Referral to secondary care specialist ED clinic - genitourinary or sexual health - to discuss other management options
- Second line therapy for ED - synthetic prostaglandin E1 analogue - alprostadil
- Acts by increasing cGMP levels thus increasing smooth muscle relaxation and penile blood dlow
- Can be given directly into the penis by
- Muse - small pellet inserted directly into urethral opening of penis
- Caverject - direct intravernosal injection into penis
- Secondary care treatments =
- Vacuum erection device - cylinder placed over penis, air removed with pump causing vacuum, increased blood flow to penis = erection
- Caution needed - constriction ring placed at base of penis to maintain erection, must not stay on longer than 30 minutes
- Can cause pain, bruising, penile numbness, skin necrosis
- Vacuum erection device - cylinder placed over penis, air removed with pump causing vacuum, increased blood flow to penis = erection
- Third line therapy - penile prosthesis surgery, only suitable for patients with severe organic erectile dysfunction which has not responded to drug treatments
When there is a family who are not known well by the practice with potential welfare concerns, which questions should be asked?
- Which family members are registered at practice?
- What are the exact relationships within the family?
- Why did they move from previous residency?
- What nursey/schools do the children attend?
- Are there any previous concerns about the family? E.g. child protection, social work
- Do the children have any existing medical problems?
- Do the adults have any medical/social problems in their history which would put children at risk e.g. alcohol/substance misuse?
- What family/friends/support is available or in place for the family?
Where can further information be gained about a family by their GP who are potentially at risk of welfare problems?
- Healthcare system
- Medical notes - contact previous GP
- Access to parents medical files - appropriate to access them if a concern is raised about the child
- Must document if this has been done in parent’s notes and whether consent was gained or not
- Child protection GP lead
- Specific GP usually assigned role of CP - gain their advice and ask if they are aware of other information shared by other agencies/have attended meetings about the family
- Health visitor
- Child protection unit
- NHS agency, could contact directly to discuss concerns or find out if any information is available locally/nationally
- Social work services
- Part of Health and Social Care Partnership, run by local authority
- May have information regarding family - HV would usually know anyway
- Education system
- School nurse - takes over care from health visotr when child enters school system
- Nursery nurse/teacher - ask if they have any concerns