Penile Doppler US - Beyond ED

Table 2: Doppler US Diagnostic Criteria for Vasculogenic Erectile Dysfunction
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Figure 22. ED in a 69-year-old man with diabetes, ischemic heart disease, and hypertension who underwent an unsuccessful trial of sildenafil treatment. (A) Longitudinal spectral Doppler US tracing image at 20 minutes shows features of arterial insufficiency. (B) Digital subtraction angiogram of the right internal iliac artery shows an occluded inferior branch (short arrow) and 80% stenosis of the superior branch (long arrow) of the internal pudendal artery. Similar findings were seen on the left side (not shown). The stenosis was treated with drug-eluting stents on both sides. (C) Axial CT image shows bilateral stents in the internal pudendal artery (arrows). (D) Longitudinal spectral Doppler US tracing image acquired 2 months after stent placement shows a normal finding with peak systolic velocity of greater than 35 cm/sec. The patient reported satisfactory erectile function. (E) Longitudinal spectral Doppler US tracing performed 6 months after stent placement shows a markedly reduced peak systolic velocity, which was persistently less than 25 cm/sec, and a parvus tardus pattern suggestive of stent occlusion or stenosis. The patient reported a return of ED similar to that at presentation. EDV = end-diastolic velocity, PSV = peak systolic velocity, RI = resistive index.
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post #23 (Go nuts!)
 

hCG Mixing Calculator

HCG Mixing Protocol Calculator

TRT Hormone Predictor Widget

TRT Hormone Predictor

Predict estradiol, DHT, and free testosterone levels based on total testosterone

⚠️ Medical Disclaimer

This tool provides predictions based on statistical models and should NOT replace professional medical advice. Always consult with your healthcare provider before making any changes to your TRT protocol.

ℹ️ Input Parameters

Normal range: 300-1000 ng/dL

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Enter your total testosterone value to see predictions

Results will appear here after calculation

Understanding Your Hormones

Estradiol (E2)

A form of estrogen produced from testosterone. Important for bone health, mood, and libido. Too high can cause side effects; too low can affect well-being.

DHT

Dihydrotestosterone is a potent androgen derived from testosterone. Affects hair growth, prostate health, and masculinization effects.

Free Testosterone

The biologically active form of testosterone not bound to proteins. Directly available for cellular uptake and biological effects.

Scientific Reference

Lakshman KM, Kaplan B, Travison TG, Basaria S, Knapp PE, Singh AB, LaValley MP, Mazer NA, Bhasin S. The effects of injected testosterone dose and age on the conversion of testosterone to estradiol and dihydrotestosterone in young and older men. J Clin Endocrinol Metab. 2010 Aug;95(8):3955-64.

DOI: 10.1210/jc.2010-0102 | PMID: 20534765 | PMCID: PMC2913038

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