Greg J Marchand

Dr. Greg J Marchand

Osteopathic Medicine, Midwestern University, Glendale, Arizona, USA
orcid
Director - Marchand Institute for Minimally Invasive Surgery

Research Focus & Metrics

Academic Career Length

16Years (2011-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications
27 January 2022 in JAMA Network Open
Verified
Journal Article
Open access
PDF file
Greg J MarchandGreg J Marchand
Greg J Marchand
AMAhmed Taher Masoud
Ahmed Taher Masoud
MGMalini Govindan
Malini Govindan
KWKelly Ware
Kelly Ware
AKAlexa King
Alexa King
KSKatelyn Sainz
Katelyn Sainz
Misuse of marijuana (the drug is generally referred to as marijuana for the smoked or ingested substance and cannabis for plant parts or derivatives) is one of the most prevalent substance use disorders, particularly among young adults, and the demands for worldwide treatment have increased.1 Marijuana (Cannabis sativa L) belongs to the Cannabaceae family and is grown extensively globally.2 During pregnancy, self-reported use of marijuana overall has ranged from 2% to 5% in several studies.3 However, some studies have reported that when limited to populations of young women living in urban areas who are less advantaged socioeconomically, that number could be as high 15% to 28%.3 Singh et al4 reported that the prevalence of prenatal cannabis use was as high as 22.6% among their included studies from different countries. Authors report that testing for marijuana use at the time of delivery is associated with increased rates of use than is self-reported during prenatal care.5 This finding, in part, may be secondary to the fact that many mothers using marijuana during pregnancy may not seek prenatal care at all.6 Some authors7 have suggested that the prevalence is thus likely underestimated, given that marijuana use is often underreported.

3 January 2022 in AJOG Global Reports
Verified
Journal Article
Open access
Greg J MarchandGreg J Marchand
Greg J Marchand
APAvinash S. Patil
Avinash S. Patil
AMAhmed T. Masoud
Ahmed T. Masoud
KWKelly Ware
Kelly Ware
AKAlexa King
Alexa King
KSKatelyn Sainz
Katelyn Sainz
COVID-19 is a rapidly changing and developing emergency that requires constant re-evaluation of available data. We report a systematic review and meta-analysis based on all published high-quality data up to and including June 3, 2021 on the maternal and neonatal outcomes in pregnant women infected with COVID-19. PubMed, SCOPUS, MEDLINE, ClinicalTrials.gov, and Web of Science databases were queried from inception up to June 3, 2021. We included all clinical studies (prospective and retrospective cohort studies, case-control studies, case series, and rapid communications) that reported data on any maternal and neonatal outcomes of pregnant women with COVID-19. The data were analyzed as pooled proportions or odds ratios and 95% confidence intervals in meta-analysis models. We included 111 studies enrolling 42,754 COVID-19-positive pregnant women. From COVID-19-positive pregnant women, the incidence rates were 53.2% (95% confidence interval, 48–58.4) for cesarean delivery, 41.5% (95% confidence interval, 36.3–46.8) for spontaneous vaginal delivery, and 6.4% (95% confidence interval, 4.5–9.2) for operative delivery. The rates of some adverse neonatal events, including premature delivery (16.7%; 95% confidence interval, 12.8–21.5) and low birthweight (16.7%; 95% confidence interval, 12.8–21.5) were relatively high in mothers infected with COVID-19. Vertical transmission (3.5%; 95% confidence interval, 2.7–4.7), neonatal death (3%; 95% confidence interval, 2–4), stillbirth (1.9%; 95% confidence interval, 1.5–2.4), and maternal mortality (0.012%; 95% confidence interval, 0.010–0.014) were rare adverse events. The mean birthweight was 3069.7 g (95% confidence interval, 3009.7–3129.8 g). In the comparative analysis, COVID-19 significantly increased the risk of premature delivery (odds ratio, 1. 48 [95% confidence interval, 1.22–1.8]), preeclampsia (odds ratio, 1.6 [95% confidence interval, 1.2–2.1]), stillbirth (odds ratio, 2.36 [95% confidence interval, 1.24–4.462]), neonatal mortality (odds ratio, 3.35 [95% confidence interval, 1.07–10.5]), and maternal mortality (odds ratio, 3.08 [95% confidence interval, 1.5–6.3]). The pooled analyses were homogenous, with mild heterogeneity in premature delivery and preeclampsia outcomes. The data must be interpreted with caution as limited data are available, and no complete assessment of bias is possible at this time. Our data suggest that pregnant women who test positive for COVID-19 seem to be at a higher risk of lower birth weights and premature delivery. There is no evidence at this time of the sharply increased maternal mortality that was seen previously with both the 2003 SARS and 2012 MERS pandemics.

1 March 2021 in American Journal of Obstetrics and Gynecology
Verified
Journal Article
Closed access
KMKerry Mills
Kerry Mills
Greg J MarchandGreg J Marchand
Greg J Marchand
KSKatelyn Sainz
Katelyn Sainz
AAAli Azadi
Ali Azadi
KWKelly Ware
Kelly Ware
AKAngela Klipp
Angela Klipp

15 July 2023 in npj Vaccines
Verified
Journal Article
Open access
PDF file
Greg J MarchandGreg J Marchand
Greg J Marchand
AMAhmed Taher Masoud
Ahmed Taher Masoud
SGSandeep Grover
Sandeep Grover
AKAlexa King
Alexa King
GBGiovanna Brazil
Giovanna Brazil
RBRichard Blumrick
Richard Blumrick
Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) is associated with increased pregnancy complications. Despite effective vaccination strategies for the general population, the evidence on the safety and efficacy of Coronavirus disease 2019 (COVID-19) vaccinations in pregnancy is limited due to a lack of well-powered studies. The present study compares the maternal, neonatal, and immunological outcomes between vaccinated pregnant and unvaccinated pregnant women using a systematic review and meta-analysis approach. We included 37 studies with a total of 141,107 pregnant women (36.8% vaccinated) spread across all outcomes. Our evidence indicates a higher rate of cesarean section in the 1898 vaccinated pregnant women compared to the 6180 women who did not receive vaccination (OR = 1.20, CI = (1.05, 1.38), P = 0.007, I2 = 45%). Regarding immunological outcomes, the risk of SARS-CoV-2 infection during pregnancy or postpartum was significantly reduced in 6820 vaccinated pregnant women compared to 17,010 unvaccinated pregnant women (OR = 0.25, CI = 0.13–0.48, P < 0.0001, I2 = 61%), as evident from qualitative assessment indicating significantly higher postpartum antibody titers compared to that observed in both unvaccinated mothers and mothers who have recently recovered from a SARS-CoV-2 infection. Our analysis represents high quality evidence showing that COVID-19 vaccination effectively raises antibody titers against SARS-CoV-2. This may confer protection against infection during pregnancy and the postpartum period. In addition to being protective against SARS-CoV-2, the vaccine was associated with decreased odds of preterm delivery. Furthermore, COVID-19 vaccination may also be associated with higher odds of cesarean section.

1 January 2012 in JSLS : Journal of the Society of Laparoscopic & Robotic Surgeons
Verified
Journal Article
Open access
RDRichard H. Demir
Richard H. Demir
Greg J MarchandGreg J Marchand
Greg J Marchand
Guidelines for referring women with pelvic masses suspicious for ovarian cancer to gynecologic oncologists have been developed by the American College of Obstetrician Gynecologists (ACOG). We set out to evaluate the negative predictive value of these guidelines and to assess a modified algorithm involving minimally invasive surgery in the treatment of women with masses suspected to be benign. 257 consecutive patients with adnexal masses of 8cm to 13cm on preoperative ultrasound examination meeting Triage Criteria set forth in ACOG Committee Opinion 280. Patients meeting the selection criteria were scheduled for operative laparoscopy, washings, adnexectomy, bagging, and colpotomy. A total of 240 patients successfully completed intended treatment (93.38%), and 234 of these did not require admission (97.5%). There was a low incidence of significant complications: 97.50% of women were successfully treated as outpatients, 97.92% of surgeries lasted <136 minutes, and <97.08% had blood loss <200mL. The negative predictive value of ACOG Committee Opinion 280 Triage Criteria as a deselector for having invasive ovarian malignancy in our population was 95.57% for premenopausal and 90.91% for postmenopausal women. Laparoscopic adnexectomy, bagging, and colpotomy is a desirable goal for patients with ovarian masses in the 8cm to 13cm range meeting selection criteria affording a minimally invasive approach with attendant benefits including outpatient treatment (97.5%), few complications, low likelihood of iatrogenic rupture of the ovarian capsule (1.25%), and low necessity for reoperation after final pathology is evaluated (6.03%). Negative predictive value of ACOG Committee Opinion 280 is confirmed in a community gynecology practice and is recommended to form the basis of a new treatment algorithm for women with adnexal masses.

8 February 2024 in AJOG Global Reports
Verified
Journal Article
Open access
Greg J MarchandGreg J Marchand
Greg J Marchand
AMAhmed Taher Masoud
Ahmed Taher Masoud
HUHollie Ulibarri
Hollie Ulibarri
AAAmanda Arroyo
Amanda Arroyo
CMCarmen Moir
Carmen Moir
AAAli Azadi
Ali Azadi
Because vaginal natural orifice transluminal endoscopic surgery and laparoscopic hysterectomy techniques both aim to decrease tissue injury and postoperative morbidity and mortality and to improve a patient's quality of life, we sought to evaluate the safety and effectiveness of a hysterectomy by vaginal natural orifice transluminal endoscopic surgery and compared that with conventional laparoscopic hysterectomy among women with benign gynecologic diseases. We used Scopus, Medline, ClinicalTrials.Gov, PubMed, and the Cochrane Library and searched from database inception to September 1, 2023. We included all eligible articles that compared vaginal natural orifice transluminal endoscopic surgery hysterectomy with any conventional laparoscopic hysterectomy technique without robotic assistance for women with benign gynecologic pathology and that included at least 1 of our main outcomes. These outcomes included estimated blood loss (in mL), operation time (in minutes), length of hospital stay (in days), decrease in hemoglobin level (g/dL), visual analog scale pain score on postoperative day 1, opioid analgesic dose required, rate of conversion to another surgical technique, intraoperative complications, postoperative complications, and requirements for blood transfusion. We included randomized controlled trials and observational studies. Ultimately, 14 studies met our criteria. The study quality of the randomized controlled trials was assessed using the Cochrane assessment tool, and the quality of the observational studies was assessed using the ROBINS-I tool. We analyzed data using RevMan 5.4.1. Continuous outcomes were analyzed using the mean difference and 95% confidence intervals under the inverse variance analysis method. Dichotomous outcomes were analyzed using OpenMeta[Analyst] and odds ratios and 95% confidence intervals were reported. The operative time and length of hospitalization were shorter in the vaginal natural orifice transluminal endoscopic surgery cohort. We also found lower visual analog scale pain scores, fewer postoperative complications, and fewer blood transfusions in the vaginal natural orifice transluminal endoscopic surgery group. We found no difference in the estimated blood loss, decrease in hemoglobin levels, analgesic usage, conversion rates, or intraoperative complications. When evaluating the latest data, it seems that vaginal natural orifice transluminal endoscopic surgery techniques may have some advantages over conventional laparoscopic hysterectomy techniques.