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Dive into the research topics where Darshan P. Patel is active.

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Featured researches published by Darshan P. Patel.


Neurourology and Urodynamics | 2016

Patient reported outcomes measures in neurogenic bladder and bowel: A systematic review of the current literature

Darshan P. Patel; Sean P. Elliott; John T. Stoffel; William O. Brant; James M. Hotaling; Jeremy B. Myers

To describe existing bladder and bowel specific quality of life (QoL) measurement tools, QoL in patients with multiple sclerosis (MS), spinal cord injury (SCI), Parkinsons Disease (PD), stroke, or spina bifida (SB) affected by bladder or bowel dysfunction, and the impact of specific bladder and bowel management on QoL.


Urology | 2015

Sperm Concentration Is Poorly Associated With Hypoandrogenism in Infertile Men

Darshan P. Patel; William O. Brant; Jeremy B. Myers; Chong Zhang; Angela P. Presson; E.B. Johnstone; Jessie Dorais; Kenneth I. Aston; Douglas T. Carrell; James M. Hotaling

OBJECTIVE To evaluate the utility of routine hormone evaluation in all men presenting for infertility by understanding the relationship between sperm concentration and hypoandrogenism. METHODS We performed a retrospective cross-sectional study between September 2013 and May 2014 at a tertiary referral center in Utah. Ninety-four men presenting for infertility consecutively between the ages of 18 and 55 years were identified. Our primary outcome was rate of hypoandrogenism among infertile men defined as the baseline total serum testosterone levels <300 ng/dL or bioavailable testosterone (BAT) levels <155 ng/dL. Secondary outcomes included association of normospermia, oligozoospermia, or azoospermia with biochemical or clinical hypoandrogenism. RESULTS Thirty-nine men (41%) had a total serum testosterone level of <300 ng/dL, and 41 men (43%) had a BAT level <155 ng/dL. Biochemical and symptomatic hypoandrogenism was common; 17 men (18%) had a total testosterone level <300 ng/dL and ≥ 3 positive Androgen Deficiency in Aging Male (ADAM) responses, and 18 men (19%) had a BAT level of <155 ng/dL and ≥ 3 positive ADAM responses. Sperm concentration (normospermia, oligozoospermia, and azoospermia) was not associated with biochemical hypoandrogenism (total testosterone level <300 ng/dL or BAT level <155 ng/dL), symptomatic hypoandrogenism (≥ 3 positive ADAM responses), or sexual dysfunction (Sexual Health Inventory for Men score <21). CONCLUSION Hypoandrogenism is common among infertile men, and routine hormonal evaluation may identify hypoandrogenism in many infertile men with otherwise normal semen analysis. Sperm concentration (normospermia, oligozoospermia, and azoospermia) is not well associated with hypoandrogenism in infertile men.


International Journal of Impotence Research | 2015

The safety and efficacy of clomiphene citrate in hypoandrogenic and subfertile men.

Darshan P. Patel; William O. Brant; Jeremy B. Myers; A P Presson; E.B. Johnstone; Jessie Dorais; K I Aston; D T Carrell; James M. Hotaling

Our objective was to evaluate the safety and efficacy of clomiphene citrate (CC) in infertile and hypoandrogenic men through a retrospective study between September 2013 and May 2014. We identified 47 men between 18 and 55 years placed on 50 mg CC every other day. We evaluated the effect of CC on testosterone after 2 weeks, rates of adverse effects and predictors of CC response. Mean baseline testosterone, bioavailable testosterone and estradiol were 246.8 ng dl−1, 125.5 ng dl−1 and 20.8 pg dl−1, respectively. At 2 weeks, mean testosterone, bioavailable testosterone and estradiol increased to 527.6 ng dl−1, 281.8 ng dl−1 and 32.0 pg dl−1 (all P<0.001). Two patients at 2 weeks and one patient at 3 months had a paradoxical decrease in testosterone. Mean total motile count (TMC) and concentration increased from 59.7 million (s.e.m.: 16.5) and 50.7 millions ml−1 (s.e.m.: 11.1) at baseline to 90.9 million (s.e.m.: 25.9) and 72.5 millions ml−1 (s.e.m.: 17.5), respectively, at 3 months, although this was nonsignificant (P=0.09, 0.09). No patient on CC experienced a paradoxical decrease in TMC or sperm concentration. On age-adjusted regression analysis, age, BMI, longitudinal testis axis, baseline follicle-stimulating hormone, LH and estradiol did not correlate with improvement in bioavailable testosterone at 2 weeks. CC improves testosterone and may improve semen parameters, although a small percentage of men may not demonstrate improvement in testosterone.


Fertility and Sterility | 2016

Cancer risk in first- and second-degree relatives of men with poor semen quality

Ross E. Anderson; Heidi A. Hanson; Darshan P. Patel; E.B. Johnstone; Kenneth I. Aston; Douglas T. Carrell; William T. Lowrance; Ken R. Smith; James M. Hotaling

OBJECTIVE To further characterize the association of male infertility with health risks by evaluating semen quality and cancer risk in family members. DESIGN Retrospective, cohort study. SETTING Not applicable. PATIENT(S) A total of 12,889 men undergoing SA and 12,889 fertile control subjects that had first-degree relative (FDR) data (n = 130,689) and 8,032 men with SA and 8,032 fertile control subjects with complete second-degree relative (SDR) data (n = 247,204) were identified through the UPDB. An equal number of fertile population control subjects were matched. INTERVENTIONS None. MAIN OUTCOME MEASURE(S) Adult all-site, testicular, thyroid, breast, prostate, melanoma, bladder, ovarian, and kidney cancer diagnoses in FDRs and SDRs. RESULT(S) The FDRs of men with SA had a 52% increased risk of testicular cancer compared with the FDRs of fertile population control subjects. There was no significant difference in testicular cancer risk for the SDRs based on any of the semen parameters. The FDRs and SDRs of azoospermic men had a significantly increased risk of thyroid cancer compared with fertile population control subjects. CONCLUSION(S) These data suggest a link between male infertility and selected cancer risk in relatives. This highlights the possibilities of shared biologic mechanisms between the two diseases, exposure to environmental factors, and an increased level of genetic and/or epigenetic burden in subfertile men and their relatives that may be associated with risk of cancer.


Diabetes Care | 2016

Cardiovascular Autonomic Neuropathy, Sexual Dysfunction, and Urinary Incontinence in Women With Type 1 Diabetes.

James M. Hotaling; Aruna V. Sarma; Darshan P. Patel; Barbara H. Braffett; Patricia A. Cleary; Eva L. Feldman; William H. Herman; Catherine L. Martin; Alan M. Jacobson; Hunter Wessells; Rodica Pop-Busui

OBJECTIVE This study evaluated associations among cardiovascular autonomic neuropathy (CAN), female sexual dysfunction (FSD), and urinary incontinence (UI) in women with type I diabetes mellitus (T1DM). RESEARCH DESIGN AND METHODS We studied 580 women with T1DM in the Diabetes Control and Complications Trial/Epidemiology of Diabetes Interventions and Complications Study (DCCT/EDIC). CAN was defined as: 1) R-R variation <15 with deep breathing or 2) R-R variation of 15–19.9 plus Valsalva ratio ≤1.5 or a supine-to-standing drop of 10 mmHg in diastolic blood pressure. A Sandvik Severity Index of 3–12 defined UI, and a Female Sexual Function Index (FSFI-R) score ≥22.75 defined FSD. Multivariable models estimated associations among CAN, FSD, and UI. RESULTS At EDIC year 17, FSD was observed in 41% of women and UI in 30%. No statistically significant associations were observed between measures of CAN at DCCT closeout and subsequent report of FSD or UI. At EDIC year 16/17, there was a 53% increased odds of having UI with a Valsalva ratio ≤1.5. At both EDIC year 13/14 and EDIC year 16/17, a 5-unit increase in R-R variation was associated with a 1.11 greater odds of having FSD. CONCLUSIONS In women with T1DM in the DCCT/EDIC, we found significant increased odds of FSD and UI with specific measures of CAN. In long-standing T1DM, CAN may predict development of FSD and may be a useful surrogate for generalized diabetic autonomic neuropathy.


BJUI | 2015

Demographic and socio-economic differences between men seeking infertility evaluation and those seeking surgical sterilization: from the National Survey of Family Growth.

James M. Hotaling; Darshan P. Patel; William O. Brant; Jeremy B. Myers; Mark R. Cullen; Michael L. Eisenberg

To identify differences in demographic and socio‐economic factors between men seeking infertility evaluation and those undergoing vasectomy, to address disparities in access to these services.


Asian Journal of Andrology | 2015

Predictors of sperm recovery after cryopreservation in testicular cancer.

James M. Hotaling; Darshan P. Patel; Christopher Vendryes; Natalya Lopushnyan; Angela P. Presson; Chong Zhang; Charles H. Muller; Tom Walsh

Our objective was to identify predictors of improved postthaw semen quality in men with testicular cancer banking sperm for fertility preservation. We reviewed 173 individual semen samples provided by 67 men with testicular germ cell tumor (TGCT) who cryopreserved sperm before gonadotoxic treatment between 1994 and 2010 at our tertiary university medical center. Our main outcomes measures were independent predictors for the greater postthaw total motile count (TMC) in men with TGCT. Men with NSGCT were more likely to be younger (P < 0.01) and had high cancer stage (II or III, P < 0.01) compared with men with seminoma. In our multiple regression model, NSGCT histology, use of density gradient purification, and fresh TMC > median fresh TMC each had increased odds of a postthaw TMC greater than median postthaw TMC. Interestingly, age, advanced cancer stage (II or III), rapid freezing protocol, and motility enhancer did not show increased odds of improved postthaw TMC in our models. In conclusion, men with TGCT or poor fresh TMC should consider preserving additional vials (at least 15 vials) before oncologic treatment. Density gradient purification should be routinely used to optimize postthaw TMC in men with TGCT. Larger, randomized studies evaluating cancer stage and various cryopreservation techniques are needed to assist in counseling men with TGCT regarding fertility preservation and optimizing cryosurvival.


BJUI | 2016

Non‐steroidal anti‐inflammatory drug (NSAID) use is not associated with erectile dysfunction risk: results from the Prostate Cancer Prevention Trial

Darshan P. Patel; Jeannette M. Schenk; Amy K. Darke; Jeremy B. Myers; William O. Brant; James M. Hotaling

To evaluate the associations of non‐steroidal anti‐inflammatory drug (NSAID) use with risk of erectile dysfunction (ED), considering the indications for NSAID use.


BJUI | 2016

Characterising the safety of clomiphene citrate in male patients through prostate-specific antigen, haematocrit, and testosterone levels.

Jason C. Chandrapal; Spencer Nielson; Darshan P. Patel; Chong Zhang; Angela P. Presson; William O. Brant; Jeremy B. Myers; James M. Hotaling

To determine the safety profile of clomiphene citrate (CC) in men being treated for hypogonadism or infertility by measuring prostate‐specific antigen (PSA), haematocrit (Hct), and testosterone levels.


Systems Biology in Reproductive Medicine | 2016

Microfluidics: The future of microdissection TESE?

Raheel Samuel; Odgerel Badamjav; Kristin Murphy; Darshan P. Patel; Jiyoung Son; Bruce K. Gale; Douglas T. Carrell; James M. Hotaling

ABSTRACT Non-obstructive azoospermia (NOA) is a severe form of infertility accounting for 10% of infertile men. Microdissection testicular sperm extraction (microTESE) includes a set of clinical protocols from which viable sperm are collected from patients (suffering from NOA), for intracytoplasmic sperm injection (ICSI). Clinical protocols associated with the processing of a microTESE sample are inefficient and significantly reduce the success of obtaining a viable sperm population. In this review we highlight the sources of these inefficiencies and how these sources can possibly be removed by microfluidic technology and single-cell Raman spectroscopy.

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