Table 19. Aetiology of retrograde ejaculation

Asthenic ejaculation

Asthenic ejaculation, also defined partial ejaculatory incompetence or 'ejaculation baveuse' [5], is characterized by an altered propulsive phase with a normal emission phase.

Orgasmic sensation is reduced and the typical rhythmic contractions associated with ejaculation are missing, while these are present in asthenic ejaculation due to urethral obstruction. The most frequent causes of asthenic ejaculation are shown in Table 20.

Table 20. Aetiology of asthenic ejaculation

Asthenic ejaculation has no major consequences on male fertility.

Premature ejaculation

Premature ejaculation is the inability to control ejaculation for a 'sufficient' length of time before vaginal penetration.

Although a universally accepted meaning of 'sufficient' length of time does not exist, some patients are not able to delay ejaculation over a few coital thrusts, or even before vaginal penetration. Premature ejaculation may be organic or psychogenic, congenital or acquired, partner-related or unselective, whether or not associated with erectile dysfunction.

Premature ejaculation does not involve any impairment of fertility, when intravaginal ejaculation occurs.

Painful ejaculation

Painful ejaculation is usually an acquired condition, which may cause moderate sexual dysfunction.

The painful sensation, felt in the perineum or urethra and urethral meatus [6], can be caused by ejacuiatory duct obstruction, prostatitis or urethritis, autonomic nerve dysfunction and psychological problems.

Diagnosis

Suggested diagnostic management includes the following procedures.

Clinical history

Diabetes, neuropathies, traumas, urogenital infections, previous surgery and drug assumption have to be checked carefully. Particular attention must be paid to micturition characteristics and ejaculation (nocturnal emission, ejacuiatory ability in given circumstances, congenital or acquired disorder, evolution), as well as to the psychosexual sphere (education, features of affective relationship, pre-existent psychological traumas, previous psychological therapies).

Physical examination

Genital and rectal examination with evaluation of the prostate, bulbocavernous reflex and anal sphincter tone

are conducted. Minimal neurological tests include

? sensitivity of the scrotum, testes and perineum

? cremasteric and abdominal cutaneous reflex

? leg osteotendinous and plantar reflexes

Post-ejaculatory urinalysis

This will assess partial retrograde ejaculation.

Cultural examinations for urethritis and prostatitis (see above Urogenital infections and disturbed male fertility).

Further diagnostic work-up. This includes:

? Neurophysiological tests (bulbocavernosus evoked response and dorsal nerve somatosensory
evoked-potentials)

? Tests for autonomic neuropathies (e.g. appreciation of temperature regulation in the feet

? Psychosexual evaluation

? Videocystometry

? Cystoscopy

? Transrectal ultrasonography

? Uroflowmetry

? Penile vibratory stimulation

Treatment

Treatment of infertility due to ejaculation disorders is rarely aetiological, and generally consists of retrieving spermatozoa to be used in assisted reproduction techniques.

Decision-making depends on the following aspects:

? Age of patient and his partner

? Couple's willingness and acceptance of the different fertility procedures

? Psychological problems in the patient and his partner

? Associated pathologies

When the ejaculatory disorder is psychogenic and the couple's request is aimed at achieving pregnancy, the most important thing is that they should undergo a preliminary psychological evaluation to avoid any severe subsequent psychological reaction.

Aetiological treatment

Aetological treatment can be summarized as follows:

? Interruption of pharmacological therapy interfering with ejaculation (if possible)

? Treatment of infectious forms (e.g. in case of painful ejaculation)

? Psychotherapy

? Surgical correction of a urethral pathology

? Correction of metabolic disorders (diabetes)

Symptomatic treatments Retrograde ejaculation:

In the absence of spinal cord injury, anatomic urethral anomalies or pharmacological therapy, an attempt must be made to induce antegrade ejaculation by drug treatment (Table 21).

Table 21. Drug therapy for retrograde ejaculation

Ephedrine sulphate, 10-15 mg four times daily [7] Midodrin, 5 mg three times daily (8] Brompheniramine maleate, 8 mg twice daily (9] Imipramine, 25-75 mg three times daily [10] Desipramine, 50 mg every second day [11]

Alternatively, the patient can be encouraged to ejaculate when his bladder is full, to increase bladder neck closure [12].

Sperm collection from post-ejaculatory urine for use in assisted reproductive techniques is suggested if:

? Drug treatment is ineffective or not tolerable due to side-effects

? The patient has a spinal cord injury

? Drug therapy inducing retrograde ejaculation cannot be interrupted

Sperm retrieval is timed with the partner's ovulation. Urine must be alkalinized by ingesting 1-3 g of sodium bicarbonate three to four times daily; pH must be in the range 7.2-7.8 immediately before ejaculation and must be checked at every micturition. Because osmolarity of urine deteriorates sperm motility, the patient is asked to drink about 500 ml_ of water 1 hour before ejaculation. The patient should than void his bladder. This procedure will help to control urine osmolarity. If the urine osmolarity is low, it will be rechecked after 15-20 minutes; if the urine osmolarity is high, the patient is again requested to drink about 200 ml_ of water. Once an optimal osmolarity has been reached (200-300 mOsm/kg), the patient is asked to have intercourse or to masturbate. Within 10 minutes after ejaculation, urine must be voided and centrifuged. The resulting pellet should be resuspended in 0.5 mLTyrode's or Ham's F-10 medium and immediately inseminated [13]. Alternatively, a catheter may be applied to the bladder and 10-50 ml Tyrode's or Ham's F-10 medium instilled. The patient must ejaculate, and a second catheterism is performed immediately to retrieve spermatozoa. The latter treatment minimizes the contact of spermatozoa with urine [14]. In order to perform intrauterine insemination, sperm quality must be good. Otherwise, the couple undergo in vitro reproductive procedures (e.g. ICSI) with fresh or cryopreserved spermatozoa.

Anejaculation

Drug treatment for anejaculation due to lymphadenectomy and neuropathy is not very effective. The same applies to psychosexual therapy for anorgasmia. In all these cases and in spinal cord injured men, vibrostimulation is the first-line therapy.

In anejaculation, penile vibratory stimulation evokes the ejaculation reflex [15].

Vibrostimulation requires an intact lumbosacral spinal cord segment. The more complete the injury above Th10, the better the chance of response. Lack of pinprick or temperature sensation in the saddle area and glans penis, inability to feel testicular squeeze, and intact lower limb and bulbocavernosus reflexes suggest a promising outcome. Negative prognostic factors are injuries below Th10 and flaccid paraplegia. Men with a history of autonomic dysreflexia are premedicated with 10-20 mg nifedipine sublingually. The bladder must be emptied before vibrostimulation. The vibrator is applied around the glans penis and frenulum, with a 1-3 mm peak-to-peak amplitude and a 80-100 Hz frequency. Ejaculation should be expected within 10 minutes and is followed by flushing, abdominal and leg spasm. Once the safety and efficacy of this procedure are assessed, patients can manage themselves at home. Intravaginal insemination via a 10-mL syringe during ovulation can be performed. If semen quality is poor, or ejaculation is retrograde, the couple may enter an in vitro fertilization programme.

If vibrostimulation fails, electroejaculation is the therapy of choice [16].

Electroejaculation is an electric stimulation of the periprostatic nerves via a probe inserted into the rectum, which seems not to be affected by reflex arc integrity. Electroejaculation requires good training because of the associated risks of autonomic hyperreflexia and rectal mucosa burning. Anaesthesia is required except in cases of complete high spinal cord injury. An automatic blood pressure cuff is applied to the patient for continuous readings; his bladder is emptied by a catheter and instilled with Ham's F10 (or similar medium). Anoscopy is previously performed to check the integrity of the bowel wall. The probe is then placed directly onto the prostate, assuring continuous mucosal contact with the temperature sensor and metal plates. Most stimulations are performed for 5-7 minutes. In 90% of the patients electrostimulation induces ejaculation, which is retrograde in one third of them. Semen quality is often poor, although improving throughout repeated ejaculations, and most couples must resort to in vitro fertilization.

If electroejaculation fails or cannot be performed, sperm retrieval from the seminal ducts may be achieved by

? Sperm aspiration from vas deferens [17] (see above Obstructive azoospermia)

? Seminal tract washout [18] (see above Obstructive azoospermia)

Epididymal obstruction or testicular failure must be suspected in case of failed sperm retrieval. TESE is then performed [19] (see above Obstructive azoospermia).

Conclusions

Ejaculation disorders can be treated with a wide range of drugs and physical stimulation trials with a high percentage of efficacy.

References

BuvatJ.

Glossaire. Les pertubations de I'ejaculation; in Buvat J, Jouannet P (eds): L'ejaculation et ses pertubations. Lyon-Villeurbanne, SIMER 1983, p 9.

Date: 2016-06-12; view: 287