Definition of erectile dysfunction

Erectile dysfunction is defined as the persistent or repeated inability to achieve and/or maintain an erection sufficient to permit satisfactory sexual activity. This condition is reported in at least three quarters of cases and can significantly affect both the patient and their partner.

Medical aspects of the penis

The penis is composed of spongy tissue surrounding the urethra and ending in the glans, which is sensitive to erotic stimuli. It also contains two symmetrical cavernous bodies, all of which are lined with smooth muscle fibers and vascular spaces. These structures are surrounded by a fibrous sheath called the tunica albuginea and are innervated by various nerve systems.

Mechanism of erection

An erection occurs when the cavernous bodies fill with blood, increasing the penis's volume and rigidity. Sexual stimuli activate the parasympathetic nervous system, causing the release of nitric oxide. This leads to the production of cyclic guanosine monophosphate (cGMP), which relaxes smooth muscles and dilates blood vessels, trapping blood in the penis.

Role of prostaglandins and cGMP

Prostaglandins E1 (PGE1) contribute to vascular relaxation by activating enzymes that increase cyclic adenosine monophosphate (cAMP), supporting penile blood flow. The duration of an erection depends on the balance between cGMP production and its degradation by phosphodiesterase type 5 (PDE5).

Erectile dysfunction causes

Erectile dysfunction is often multifactorial, influenced by age, metabolic or cardiovascular issues, neurological conditions, endocrine disorders, and psychological factors. Diagnosis involves patient interviews, physical exams, and additional tests to identify underlying causes and comorbidities.

Diagnostic process

The diagnostic process includes evaluating the onset of symptoms, checking for spontaneous erections, and assessing psychological impact. A physical exam may look for conditions like phimosis or penile deformation. Cardiovascular risk factors are also assessed, including blood pressure, weight, and body mass index.

Biological and complementary tests

Biological tests include fasting blood glucose, lipid profiles, and testosterone levels, depending on the patient's age and risk factors. Complementary tests may involve cardiovascular assessments, penile Doppler exams, or sleep studies if sleep apnea is suspected.

Health implications of erectile dysfunction

Erectile dysfunction can be an early indicator of conditions like diabetes or cardiovascular disease. It may signal underlying health issues such as coronary atherosclerosis and can affect a person's quality of life, self-esteem, and relationships.

Personal experience with treatment

Lionel, 53, shared how he regained psychological balance after a car accident that caused Lapeyronie's disease, leading to penile deviation and eventual implant surgery. His treatment included a year of using a vacuum pump before successful surgery improved his quality of life.

Treatment strategies

The management of erectile dysfunction focuses on restoring sexual function, improving quality of life, and addressing associated health risks. Strategies include lifestyle changes, treating comorbidities, and using medications, vacuum pumps, or surgical options like penile implants.

PDE5 inhibitors and their use

Phosphodiesterase type 5 (PDE5) inhibitors are the first-line treatment for most patients. Their effectiveness depends on sexual stimulation. If ineffective, factors like dosage, administration, and drug interactions are reviewed. Alprostadil is an alternative for those who cannot use PDE5 inhibitors.

Penile implants and other treatments

Penile implants are used for severe cases or when other treatments fail. Inflatable silicone prostheses are common. Eroxon, a gel available without a prescription, is also used. Yohimbine, though still marketed, is no longer recommended for treating erectile dysfunction.

Side effects and precautions

PDE5 inhibitors can cause side effects such as headaches, facial redness, and digestive issues. They should be used with caution due to potential interactions with nitrates and poppers. Priapism and vision changes require immediate medical attention.

Proper use of alprostadil

Alprostadil use requires patient education on self-injections and awareness of prolonged erection risks. A condom is recommended to protect the partner from potential side effects. The cream should be stored in the refrigerator or at room temperature for a short period.