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D'Souza, Ryan S

0000-0002-4601-9837

Mayo Clinic

Mayo Clinic

Citations 115

Patient-Controlled Analgesia
D’Souza, Ryan, Hao, David, Hao, David , D'Souza, Ryan, Cho, James , D'Souza, Ryan S

New England Journal of Medicine | February 18, 2026 | Volume: 394 | Issue: 8 | Pages: No page available

10.1056/nejmvcm2500240 Get It

Categorizing Trends in Anesthesiology Residency Applicants’ Research Portfolios and Impact on Matching: A Program-Level Study
Holloway, Jordan , Kossbiel, Briana J. , Yu, Yue , Palettas, Marilly , Stahl, David, Baumann, Amy, Essandoh, Michael, D’Souza, Ryan, Hussain, Nasir, Stahl, David L. , Baumann, Amy, Essandoh, Michael , D'Souza, Ryan S , Hussain, Nasir

Anesthesia & Analgesia | February 9, 2026 | Volume: 143 | Issue: 3 | Pages: 636-647

10.1213/ane.0000000000007977 Get It

BACKGROUND: Recent years have seen considerable growth and significant changes in the anesthesiology residency application process. Although the National Residency Match Program provides data on attributes of successfully matching applicants, it does not provide detailed characteristics of applicants’ research portfolio. This single-program retrospective analysis aims to characterize granular aspects of applicant research experiences to determine whether research involvement is linked to higher odds of matching. METHODS: Applications from interviewed United States allopathic (US-MD) and osteopathic (US-DO) applicants at a single anesthesiology residency program were analyzed for research experience. The primary outcome assessed was the association of any research experience with odds of ranked-to-match and the association of specific types of research experience with ranked-to-match. Secondary outcomes included the association of medical degree type (US-MD vs US-DO) or affiliation of medical school with an anesthesiology residency program to the number of research experiences, and the association of research experiences with the United States Medical Licensing Examination (USMLE) Step 1 score type (Pass/Fail vs Scored). RESULTS: Applicants with at least one research experience were more likely to be ranked-to-match than applicants without research experience (odds ratio [OR]: 2.16, 95% confidence interval [CI], [1.55–3.02], P < .001). Similar odds were demonstrated for applicants with at least one peer-reviewed publication compared to no peer-reviewed publications (OR: 2.25, 95% CI, [1.79–2.82], P < .001), and at least one anesthesiology-related research experience compared to no anesthesiology-related research experience (OR: 1.76, 95% CI, [1.36–2.26], P < .001. Applicants from US-MD schools were more likely to have research experience than those from US-DO schools ( P < .001); applicants from a medical school affiliated with an anesthesiology residency were more likely to have research experience than applicants from unaffiliated medical schools ( P < .001); and applicants with Pass/Fail USMLE Step 1 examinations were more likely than their Scored counterparts to report at least one research experience ( P < .001). CONCLUSIONS: Applicant research is associated with greater odds of being ranked-to-match in anesthesiology residency. Applicants from US-MD schools and schools affiliated with anesthesiology residency programs have significantly greater rates of reporting at least one research experience. There is a trend toward a higher incidence of reporting at least one research experience with the change of USMLE Step 1 policy toward a Pass/Fail examination.
Practice advisory: Inpatient intravenous headache management
D’Souza, Ryan, Narouze, Samer , D’Souza, Ryan S. , D'Souza, Ryan S , Narouze, Samer , Hoydonckx, Yasmine

Regional Anesthesia & Pain Medicine | January 30, 2026 | Volume: No volume available | Issue: No issue available | Pages: rapm-2026-107605

10.1136/rapm-2026-107605 Get It

Only part of the story? Mechanistic insights into dye-based spread models
D’Souza, Ryan S. , Labandeyra, Hipólito , Saini, Camille , Umek, Nejc , D'Souza, Ryan S , Saini, Chandan

Regional Anesthesia & Pain Medicine | January 14, 2026 | Volume: No volume available | Issue: No issue available | Pages: rapm-2025-107563

10.1136/rapm-2025-107563 Get It

Does anesthetic type matter for C-sections? Neuraxial versus general anesthesia impact on children’s long-term development
D’Souza, Ryan S. , Labandeyra, Hipólito , D'Souza, Ryan S

Regional Anesthesia & Pain Medicine | January 14, 2026 | Volume: No volume available | Issue: No issue available | Pages: rapm-2025-107534

10.1136/rapm-2025-107534 Get It

Invasive procedures for hiccups: a national single healthcare system study
Cathcart-Rake, Elizabeth , D’Souza, Ryan S. , Moynagh, Michael R., Buttar, Navtej , Jatoi, Aminah , Ehret, Christopher J, D'Souza, Ryan S , Buttar, Nav S, Jatoi, Aminah , Cathcart-Rake, Elizabeth J , Ehret, Christopher

BMJ Supportive & Palliative Care | December 17, 2025 | Volume: 16 | Issue: 2 | Pages: 434-440

10.1136/spcare-2025-005897 Get It

Objectives On rare occasions, hiccups can cause morbidity, such as sleep deprivation, aspiration and even death. At times, palliative invasive procedures are considered. This study tested the hypothesis that invasive procedures can provide hiccup palliation with an acceptable safety profile. Methods Multi-site electronic medical data were used to assess adult patients who underwent an invasive procedure for hiccups between January 1995 and January 2022. Hiccup palliation was defined as documented improvement in severity or frequency of this sign/symptom after the procedure. Results A total of 69 patients underwent one or more invasive procedures for hiccups (144 total procedures). Fifty-nine patients (86%) were men. The most frequent initial procedure was a phrenic nerve block (n=10) followed by oesophageal dilation (n=9). Only 31 patients (45%) manifested hiccup palliation after their first procedure. Nearly half, or 32 patients (46%), underwent more than one procedure (2 underwent nine procedures). Of these subsequent procedures, 35 resulted in palliation. Five adverse events arose from 144 procedures: post-esophagectomy atrial fibrillation, haematoma after cardiac device removal, vocal cord immobility after craniotomy, vocal cord immobility after vagal nerve manipulation, and a cerebral spinal leak after vagal nerve decompression. Conclusions Invasive procedures can palliate hiccups with an acceptable safety profile. However, these procedures appear to palliate hiccups in only about half of patients and sometimes do so only transiently.
Evaluating the Statistical Robustness of Randomized Controlled Trials of Spinal Cord Stimulation for Pain through the Use of Fragility Index
Hussain, Nasir , Brull, Richard , Shah, Raghav , Bozer, Jordan, D’Souza, Ryan S. , Weaver, Tristan, D'Souza, Ryan S , Karri, Jay , Prokop, Larry J. , Abdallah, Faraj W.

Anesthesiology | December 11, 2025 | Volume: 144 | Issue: 4 | Pages: 898-912

10.1097/aln.0000000000005876 Get It

Background: The use of spinal cord stimulation (SCS) for managing severe refractory chronic pain has expanded considerably due to positive statistical evidence regarding its use; however, the statistical robustness of the underlying randomized controlled trials (RCTs) requires further scrutiny. One such tool that can be used for this purpose is the fragility index, which quantifies how many individual outcome events must be altered for an outcome to lose statistical significance. Thus the index can be used quantitatively to assess the stability and robustness of an RCT’s conclusions, with higher values indicating increased trial stability. This study assesses the fragility of pain outcomes across RCTs investigating SCS for chronic pain to better understand the quality and robustness of evidence. Methods: A systematic search was conducted for RCTs assessing SCS for any chronic pain indication. The primary outcome was an evaluation of the trial-specific fragility index for the prespecified pain primary outcomes of RCTs. Secondary outcomes included an evaluation of fragility for (1) specified indications for SCS therapy, (2) reported pain outcomes appearing in three or more RCTs, (3) the presence/absence of a conflict of interest, and (4) comparisons of SCS to conservative management or different SCS waveform modalities. Results: A total of 30 RCTs were included. The median (interquartile range [IQR]) fragility index across the primary outcome of all trials was 5.45 (3.00 to 11.45). There was no statistical difference between the (1) types of outcomes (dichotomous vs. continuous; P = 0.710), (2) primary versus secondary pain outcomes ( P = 0.771), or (3) presence versus absence of trial conflict of interest ( P = 0.753). Indications with a median (IQR) fragility score greater than three included persistent spinal pain syndrome type 2 with a score of 8.00 (2.80 to 12.60), painful diabetic neuropathy with a score of 6.00 (3.00 to 11.80), complex regional pain syndrome with a score of 7.20 (4.62 to 81.50), mixed etiologies with a score of 9.00 (3.00 to 38.00), and other etiologies with a score of 3.00 (1.00 to 8.55). Conclusions: This study suggests that the majority of RCTs investigating primary pain outcomes after SCS therapy are robust with relatively high fragility scores. Reporting the fragility of outcomes in trials can provide a more comprehensive assessment of trial robustness and can further aid clinicians in interpreting trial results and making informed treatment decisions.
Evidence-based recommendations for sacroiliac joint complex pain management
D’Souza, Ryan S. , Cohen, Steven P. , Cohen, Steven P , D'Souza, Ryan S , Hurley, Robert W.

Regional Anesthesia & Pain Medicine | November 30, 2025 | Volume: No volume available | Issue: No issue available | Pages: rapm-2025-107423

10.1136/rapm-2025-107423 Get It

Rebuttal to: Hakim and Narouze; To trial pending strong evidence for otherwise
D’Souza, Ryan S. , Yu, Yue , Hussain, Nasir , Karri, Jay , Hussain, Nasir , D'Souza, Ryan S , Karri, Jay

Regional Anesthesia & Pain Medicine | November 27, 2025 | Volume: No volume available | Issue: No issue available | Pages: rapm-2025-107412

10.1136/rapm-2025-107412 Get It

Ethics, economics, and patient-centered outcomes of spinal cord stimulation
D’Souza, Ryan S. , D'Souza, Ryan S , Shanthanna, Harsha

Current Opinion in Anaesthesiology | November 17, 2025 | Volume: 39 | Issue: 2 | Pages: 193-199

10.1097/aco.0000000000001592 Get It

Purpose of the review With the widespread integration of spinal cord stimulation (SCS) into clinical practice, understanding its ethical, economic, and patient-centered implications has become increasingly important. This review critically examines recent evidence across these domains to illuminate challenges and opportunities for advancing transparent, ethical, patient-centered, and value-based neuromodulation practice. Recent findings Recent analyses reveal persistent challenges with bias, conflicts of interest, and selective outcome reporting in neuromodulation research. Studies demonstrate significant disparities in access to SCS across racial and socioeconomic groups and highlight new ethical considerations associated with artificial intelligence–enabled and informed treatment in neuromodulation. Contemporary randomized trials support clinically meaningful improvements in pain, functionality, psychological outcomes, and other patient-centered outcomes, although durability remains inconsistent because of the potential for therapy habituation or adverse events. Despite high initial upfront costs, evaluations of SCS cost-effectiveness across healthcare systems generally favor SCS over conventional medical management when assessed over multiyear periods, with differential economic benefits observed based on the type of waveform and type of national healthcare system. Summary While current evidence supports the clinical and long-term economic benefits of SCS in defined clinical contexts and indications, gaps in research transparency, equitable access to care, economic considerations, and durability of effectiveness persist.