Final answer:
Erectile dysfunction in a man who has normal nocturnal erections but cannot sustain an erection with a partner may be due to psychological factors, and treatment could include therapy or counseling. Medical conditions leading to ED should also be addressed, and medications like PDE5 inhibitors might be prescribed.
Step-by-step explanation:
The question pertains to a case of erectile dysfunction (ED), which is a condition wherein a man has difficulty either initiating or maintaining an erection. When a patient reports normal nocturnal erections but is unable to sustain an erection with a partner, psychological factors such as performance anxiety or stress may be contributing to the situation. Treatment (Tx) could involve counseling or therapy to address these psychological issues. Additionally, if there are underlying medical conditions contributing to ED, such as diabetes or cardiovascular disease, these should be managed accordingly. In some cases, pharmacological interventions, like phosphodiesterase type 5 (PDE5) inhibitors, can be prescribed to help improve erectile function.