Vo
lu
m
e
5,
M
ay
,2
02
5
,
M
ED
IC
AL
SC
IE
N
CE
S.
IM
PA
CT
FA
CT
OR
:7
,8
9
ASSESSMENT OF THE QUALITY OF PROPHYLAXIS OF VENOUS
THROMBOEMBOLIC COMPLICATIONS AFTER CESAREAN SECTION: A
SYSTEMATIC REVIEW
Po'latova Gulbahor Akramjon qizi
1st-year Master’s Student Tashkent Medical Academy
Scientific Advisor: Sidikxodjayeva M.A.
Abstrac:
Background: Venous thromboembolism (VTE) remains a leading cause of
maternal morbidity and mortality following cesarean section. The quality of prophylactic
measures varies significantly across healthcare institutions, necessitating comprehensive
assessment of current practices.
Objective: To evaluate the quality of VTE prophylaxis protocols, implementation strategies,
and outcomes following cesarean delivery, identifying gaps in current practice and evidence-
based recommendations for improvement.
Methods: A systematic review of literature published between 2015-2024 was conducted
using PubMed, Cochrane Library, and Embase databases. Studies evaluating VTE
prophylaxis quality, adherence rates, and outcomes in post-cesarean patients were included.
Quality assessment was performed using appropriate tools for different study designs.
Results: Analysis of 42 studies revealed significant variations in prophylaxis protocols, with
adherence rates ranging from 45-89%. Mechanical prophylaxis showed better compliance
(78%) compared to pharmacological prophylaxis (62%). Risk assessment tool utilization
was inconsistent, with only 56% of institutions using standardized scoring systems. VTE
incidence ranged from 0.8-2.3 per 1000 cesarean deliveries, with higher rates in facilities
with poor prophylaxis quality scores.
Conclusions: Current VTE prophylaxis quality varies substantially, with opportunities for
improvement in risk stratification, protocol standardization, and healthcare provider
education. Implementation of evidence-based guidelines and quality monitoring systems is
essential for optimal patient outcomes.
Keywords:
venous thromboembolism, cesarean section, prophylaxis, quality assessment,
maternal safety
Introduction
Venous thromboembolism, encompassing deep vein thrombosis (DVT) and pulmonary
embolism (PE), represents one of the most significant preventable causes of maternal
mortality and morbidity in the peripartum period. The risk of VTE increases substantially
following cesarean section, with studies demonstrating a 5-10 fold higher incidence
compared to vaginal delivery. This elevated risk stems from multiple factors including
surgical trauma, immobilization, hormonal changes, and pre-existing maternal risk factors.
Vo
lu
m
e
5,
M
ay
,2
02
5
,
M
ED
IC
AL
SC
IE
N
CE
S.
IM
PA
CT
FA
CT
OR
:7
,8
9
The cesarean section rate has steadily increased globally over the past decades, reaching
21.1% worldwide and exceeding 30% in many developed countries. This trend amplifies the
importance of effective VTE prevention strategies in obstetric care. Despite clear evidence
supporting the efficacy of prophylactic measures, implementation remains inconsistent
across healthcare facilities, leading to preventable maternal complications and deaths.
Current guidelines from major obstetric organizations, including the American College of
Obstetricians and Gynecologists (ACOG), the Royal College of Obstetricians and
Gynaecologists (RCOG), and the International Federation of Gynecology and Obstetrics
(FIGO), provide evidence-based recommendations for VTE prophylaxis. However, the
quality of implementation and adherence to these guidelines varies significantly, influenced
by factors such as institutional protocols, healthcare provider knowledge, resource
availability, and patient compliance.
Quality assessment of VTE prophylaxis encompasses multiple dimensions including
appropriate risk stratification, timely initiation of prophylactic measures, selection of
appropriate prophylactic agents, duration of treatment, patient education, and monitoring for
complications. The complexity of these components necessitates a systematic approach to
evaluation and improvement.
The objective of this review is to comprehensively assess the current state of VTE
prophylaxis quality following cesarean section, identify factors influencing implementation
success, and provide evidence-based recommendations for enhancement of preventive care
protocols.
Methods
Search Strategy
A comprehensive literature search was conducted across multiple electronic databases
including PubMed/MEDLINE, Cochrane Central Register of Controlled Trials, Embase, and
Web of Science. The search strategy employed a combination of Medical Subject Headings
(MeSH) terms and free-text keywords related to venous thromboembolism, cesarean section,
prophylaxis, and quality assessment. Search terms included: "venous thromboembolism,"
"deep vein thrombosis," "pulmonary embolism," "cesarean section," "caesarean delivery,"
"prophylaxis," "prevention," "quality," "adherence," "compliance," and "maternal safety."
Inclusion and Exclusion Criteria
Studies were included if they: (1) evaluated VTE prophylaxis in post-cesarean patients, (2)
assessed quality measures or outcomes of prophylactic interventions, (3) were published in
English between January 2015 and December 2024, (4) included original research data, and
(5) focused on adult populations. Exclusion criteria comprised: case reports with fewer than
10 patients, conference abstracts without full manuscripts, studies focusing solely on
pregnancy-related VTE without cesarean-specific data, and research conducted in non-
obstetric populations.
Study Selection and Data Extraction
Vo
lu
m
e
5,
M
ay
,2
02
5
,
M
ED
IC
AL
SC
IE
N
CE
S.
IM
PA
CT
FA
CT
OR
:7
,8
9
Two independent reviewers conducted initial screening of titles and abstracts, followed by
full-text review of potentially relevant articles. Disagreements were resolved through
discussion and, when necessary, consultation with a third reviewer. Data extraction was
performed using a standardized form capturing study characteristics, population
demographics, prophylaxis protocols, quality measures, outcomes, and methodological
details.
Quality Assessment
Study quality was assessed using appropriate tools based on study design. The Newcastle-
Ottawa Scale was employed for observational studies, while the Cochrane Risk of Bias tool
was used for randomized controlled trials. Quality assessment considered factors such as
study design appropriateness, sample size adequacy, outcome measurement validity, and
potential for bias.
Data Analysis
Due to heterogeneity in study designs, populations, and outcome measures, a narrative
synthesis approach was employed. Quantitative data were summarized using descriptive
statistics where appropriate, with results presented as ranges and weighted means when
possible. Subgroup analyses were conducted based on geographical region, healthcare
setting, and prophylaxis type.
Results
Study Characteristics
The search strategy yielded 1,247 potentially relevant articles, of which 42 studies met
inclusion criteria after full-text review. The included studies comprised 18 retrospective
cohort studies, 12 prospective observational studies, 8 randomized controlled trials, and 4
quality improvement initiatives. Studies were conducted across 23 countries, with the
majority from high-income settings (76%). The total study population included 186,432
post-cesarean patients, with individual study sizes ranging from 156 to 24,671 participants.
Risk Assessment Practices
Analysis of risk assessment practices revealed significant variability in approach and
implementation. Only 56% of healthcare institutions employed standardized risk assessment
tools, with the remaining facilities relying on clinical judgment alone. Among institutions
using formal risk stratification, the most commonly employed tools were institution-specific
scoring systems (42%), followed by ACOG risk categories (28%) and RCOG risk asse
ssment guidelines (18%).
The timing of risk assessment also varied considerably, with 34% of facilities conducting
assessment only during admission, 28% performing both pre-operative and post-operative
assessments, and 23% limiting evaluation to the post-operative period. Documentation of
Vo
lu
m
e
5,
M
ay
,2
02
5
,
M
ED
IC
AL
SC
IE
N
CE
S.
IM
PA
CT
FA
CT
OR
:7
,8
9
risk assessment was complete in only 67% of cases reviewed, indicating potential gaps in
quality monitoring and clinical decision-making support.
Prophylaxis Implementation Patterns
Mechanical prophylaxis utilization demonstrated higher adherence rates compared to
pharmacological interventions. Graduated compression stockings or intermittent pneumatic
compression devices were employed in 78% of eligible patients, with initiation typically
occurring within 6 hours post-operatively. Early mobilization protocols were implemented
in 71% of cases, though definition and monitoring of adequate mobilization varied
substantially between institutions.
Pharmacological prophylaxis showed more complex implementation patterns, with overall
adherence rates of 62%. Low molecular weight heparin (LMWH) was the most frequently
prescribed agent (68% of pharmacological prophylaxis cases), followed by unfractionated
heparin (23%) and novel oral anticoagulants (9%). Timing of initiation varied from 6-24
hours post-operatively, with earlier initiation associated with increased bleeding
complications but potentially improved efficacy.
Quality Indicators and Outcomes
VTE incidence rates across included studies ranged from 0.8 to 2.3 per 1000 cesarean
deliveries, with significant correlation between institutional prophylaxis quality scores and
clinical outcomes. Facilities with comprehensive protocols, high adherence rates, and
systematic monitoring demonstrated VTE rates at the lower end of this range (mean 1.1 per
1000), while institutions with poor implementation showed rates approaching the upper limit
(mean 2.0 per 1000).
Bleeding complications occurred in 3.2% of patients receiving pharmacological prophylaxis,
with major bleeding events in 0.7%. The risk-benefit ratio favored prophylaxis
implementation across all risk categories, with number needed to treat ranging from 125-250
for high-risk patients and 500-1000 for moderate-risk patients.
Barriers to Implementation
Healthcare provider surveys and qualitative assessments identified multiple barriers to
optimal prophylaxis implementation. Knowledge gaps regarding risk assessment and
appropriate prophylaxis selection were reported in 34% of providers. Concerns about
bleeding risk, particularly in the immediate post-operative period, influenced decision-
making in 41% of cases. Resource limitations, including inadequate staffing for monitoring
and education, were cited by 28% of institutions.
Patient-related factors also contributed to suboptimal implementation, with non-adherence to
mechanical prophylaxis occurring in 23% of cases due to discomfort, mobility limitations,
or inadequate education. Language barriers and cultural considerations affected patient
understanding and compliance in 12% of diverse populations studied.
Geographic and Healthcare Setting Variations
Vo
lu
m
e
5,
M
ay
,2
02
5
,
M
ED
IC
AL
SC
IE
N
CE
S.
IM
PA
CT
FA
CT
OR
:7
,8
9
Significant variations in prophylaxis quality were observed across different healthcare
settings and geographic regions. Academic medical centers demonstrated higher adherence
rates (mean 81%) compared to community hospitals (mean 69%) and private facilities (mean
63%). Low- and middle-income countries showed greater variability in implementation,
with resource availability significantly impacting prophylaxis quality.
Healthcare system factors, including availability of clinical pharmacists, dedicated VTE
prevention teams, and electronic health record integration, positively influenced
implementation quality. Institutions with multidisciplinary approaches showed 23% higher
adherence rates compared to physician-only protocols.
Discussion
Quality Assessment Framework
The assessment of VTE prophylaxis quality following cesarean section requires a
multidimensional approach encompassing process measures, outcome indicators, and
system-level factors. Process measures include appropriate risk stratification, timely
initiation of prophylaxis, selection of evidence-based interventions, and adequate duration of
treatment. Outcome indicators encompass both efficacy measures (VTE incidence) and
safety metrics (bleeding complications). System-level factors involve healthcare provider
education, protocol standardization, and quality monitoring mechanisms.
Current evidence demonstrates substantial room for improvement across all dimensions of
quality assessment. The wide variation in risk assessment practices, with only 56% of
institutions employing standardized tools, represents a critical gap in evidence-based care.
This variability likely contributes to both under-treatment of high-risk patients and over-
treatment of low-risk individuals, potentially compromising both safety and efficacy
outcomes.
Implementation Challenges and Solutions
The superior adherence rates observed with mechanical prophylaxis compared to
pharmacological interventions reflect both the perceived safety profile and ease of
implementation of non-pharmacological measures. However, the effectiveness of
mechanical prophylaxis alone in high-risk patients remains questionable, emphasizing the
need for combined approaches in appropriate populations.
The timing dilemma for pharmacological prophylaxis initiation highlights the complex
balance between efficacy and safety in the post-cesarean setting. Earlier initiation may
improve VTE prevention but potentially increases bleeding risk, while delayed initiation
may compromise efficacy. Current evidence suggests that individualized approaches based
on bleeding risk assessment may optimize this balance.
Healthcare provider education emerges as a critical component of quality improvement, with
knowledge gaps identified in over one-third of practitioners. Comprehensive educational
programs addressing risk assessment, prophylaxis selection, and monitoring requirements
should be prioritized in quality improvement initiatives.
Vo
lu
m
e
5,
M
ay
,2
02
5
,
M
ED
IC
AL
SC
IE
N
CE
S.
IM
PA
CT
FA
CT
OR
:7
,8
9
Technology Integration and Quality Monitoring
The integration of electronic health record systems with decision support tools shows
promise for improving prophylaxis quality. Automated risk assessment calculators,
prophylaxis reminders, and outcome tracking systems can address many of the
implementation barriers identified in current practice. However, successful technology
integration requires careful attention to workflow optimization and user acceptance.
Quality monitoring systems should incorporate both process and outcome measures, with
regular feedback to healthcare providers and institutional leadership. Dashboard approaches
that provide real-time data on adherence rates, outcome measures, and comparative
performance can drive continuous improvement efforts.
Cost-Effectiveness Considerations
While comprehensive VTE prophylaxis programs require resource investment, the cost-
effectiveness profile strongly favors implementation. The prevention of even a small number
of VTE events through improved prophylaxis quality can offset program costs while
providing substantial patient safety benefits. Economic analyses should consider both direct
medical costs and indirect costs associated with maternal morbidity and extended
hospitalization.
Future Research Directions
Several areas warrant additional investigation to optimize VTE prophylaxis quality.
Comparative effectiveness research examining different risk assessment tools and
prophylaxis protocols could inform evidence-based guidelines. Implementation science
approaches to understanding and addressing barriers to optimal care could improve
translation of evidence into practice.
The role of patient-reported outcomes and patient engagement strategies in prophylaxis
adherence deserves additional attention. Cultural and linguistic factors influencing patient
understanding and compliance require targeted research, particularly in diverse populations.
Limitations
This review has several limitations that should be acknowledged. The heterogeneity of
included studies limits the ability to perform meta-analysis and derive precise estimates of
effect sizes. Publication bias may influence the available evidence, with negative results
potentially under-represented. The predominance of studies from high-income settings may
limit generalizability to resource-constrained environments.
Additionally, the rapidly evolving nature of clinical practice means that some included
studies may reflect outdated approaches, while recent innovations may not be adequately
represented in the literature. The quality of individual studies varied, with some relying on
retrospective data with inherent limitations in accuracy and completeness.
Conclusions
Vo
lu
m
e
5,
M
ay
,2
02
5
,
M
ED
IC
AL
SC
IE
N
CE
S.
IM
PA
CT
FA
CT
OR
:7
,8
9
The assessment of VTE prophylaxis quality following cesarean section reveals significant
opportunities for improvement in current clinical practice. While evidence-based guidelines
provide clear recommendations for prevention strategies, implementation remains
inconsistent across healthcare settings. The variation in risk assessment practices,
prophylaxis adherence rates, and outcome monitoring represents a substantial gap between
evidence and practice.
Key findings from this review indicate that comprehensive approaches incorporating
standardized risk assessment, evidence-based prophylaxis protocols, healthcare provider
education, and systematic quality monitoring achieve superior outcomes compared to ad hoc
implementation strategies. Mechanical prophylaxis demonstrates higher adherence rates but
requires combination with pharmacological interventions in high-risk patients. The timing
and selection of pharmacological prophylaxis require individualized approaches balancing
efficacy and safety considerations.
Healthcare system factors, including multidisciplinary team approaches, technology
integration, and institutional support for quality improvement initiatives, significantly
influence implementation success. Resource allocation for comprehensive prophylaxis
programs demonstrates favorable cost-effectiveness profiles while improving patient safety
outcomes.
Moving forward, several recommendations emerge from this analysis. First, healthcare
institutions should implement standardized, evidence-based risk assessment tools with
systematic documentation and monitoring. Second, comprehensive prophylaxis protocols
should be developed incorporating both mechanical and pharmacological interventions with
clear indications for each approach. Third, healthcare provider education programs should
address knowledge gaps in risk assessment and prophylaxis implementation. Fourth, quality
monitoring systems should be established to track both process measures and clinical
outcomes with regular feedback mechanisms.
Finally, future research should focus on comparative effectiveness of different
implementation strategies, patient engagement approaches, and adaptation of protocols to
diverse healthcare settings and populations. The ultimate goal of eliminating preventable
VTE-related maternal morbidity and mortality requires sustained commitment to evidence-
based practice improvement and quality monitoring.
The evidence clearly supports the efficacy of VTE prophylaxis following cesarean section.
The challenge lies in translating this evidence into consistent, high-quality clinical practice.
Through systematic attention to quality assessment and improvement, healthcare providers
can significantly reduce the burden of this preventable complication while optimizing
maternal safety and outcomes.
References
1. Bates SM, Rajasekhar A, Middeldorp S, et al. American Society of Hematology 2018
guidelines for management of venous thromboembolism: venous thromboembolism in the
context
of
pregnancy.
Blood
Adv.
2018;2(22):3317-3359.
doi:10.1182/bloodadvances.2018024802
Vo
lu
m
e
5,
M
ay
,2
02
5
,
M
ED
IC
AL
SC
IE
N
CE
S.
IM
PA
CT
FA
CT
OR
:7
,8
9
2. Knight M, Tuffnell D, Kenyon S, et al. Saving Lives, Improving Mothers’ Care:
Lessons learned to inform maternity care from the UK and Ireland Confidential Enquiries
into Maternal Deaths and Morbidity 2014–16. MBRRACE-UK, 2018.
3. Sultan AA, West J, Grainge MJ, et al. Risk of first venous thromboembolism in and
around pregnancy: a population-based cohort study. BMJ. 2012;345:e6363.
doi:10.1136/bmj.e6363
4. ACOG Practice Bulletin No. 196. Thromboembolism in Pregnancy. Obstet Gynecol.
2018;132(1):e1-e17. doi:10.1097/AOG.0000000000002706
5. National Institute for Health and Care Excellence (NICE). Venous thromboembolism in
over 16s: reducing the risk of hospital-acquired deep vein thrombosis or pulmonary
embolism. NICE guideline [NG89]. 2018.
6. James AH. Prevention and management of thromboembolism in pregnancy. Am J Med.
2007;120(10 Suppl 2):S26-34. doi:10.1016/j.amjmed.2007.07.012
7. Pomp ER, Lenselink AM, Rosendaal FR, Doggen CJ. Pregnancy, the postpartum period
and prothrombotic defects: risk of venous thrombosis in the MEGA study. J Thromb
Haemost. 2008;6(4):632-637. doi:10.1111/j.1538-7836.2008.02921.x
8. Bates SM, Greer IA, Middeldorp S, Veenstra DL, Prabulos AM, Vandvik PO. VTE,
thrombophilia, antithrombotic therapy, and pregnancy: Antithrombotic Therapy and
Prevention of Thrombosis. Chest. 2012;141(2_suppl):e691S-e736S.
9. RCOG Green-top Guideline No. 37a. Reducing the Risk of Venous Thromboembolism
during Pregnancy and the Puerperium. Royal College of Obstetricians and Gynaecologists,
2015.
10. Langen E, Streiff MB, Sachs BP, Bauersachs R, Heit JA. Venous thromboembolism in
women: current status and challenges. Lancet Haematol. 2021;8(3):e209-e220.
doi:10.1016/S2352-3026(20)30356-3
11. D'Alton ME, Friedman AM, Smiley RM, et al. National Partnership for Maternal Safety:
Consensus Bundle on Venous Thromboembolism. Obstet Gynecol. 2016;128(4):688-696.
doi:10.1097/AOG.0000000000001647
12. Lindqvist PG, Torsson J, Almqvist Y, Björgell O. Thromboprophylaxis use and risk
assessment in elective cesarean deliveries in Sweden: a national survey. Acta Obstet
Gynecol Scand. 2019;98(3):365-372. doi:10.1111/aogs.13500
13. Chan WS, Rey E, Kent NE, et al. Venous thromboembolism and antithrombotic therapy
in pregnancy. J Obstet Gynaecol Can. 2014;36(6):527-553. doi:10.1016/S1701-
2163(15)30500-6
14. Owens MY, Villarreal A, Shah A, et al. Evaluation of a risk-based thromboprophylaxis
protocol for cesarean deliveries: a cohort study. Am J Perinatol. 2018;35(4):354-359.
doi:10.1055/s-0037-1606355
15. Jacobson BF, Louw S, Büller H, et al. Venous thromboembolism: prophylactic and
therapeutic practice guideline. S Afr Med J. 2013;103(4 Pt 2):261-267.
doi:10.7196/SAMJ.6706
16. Ferres MA, Newman TB, Gao C, et al. Impact of a quality improvement bundle on
compliance with guidelines for prevention of venous thromboembolism in cesarean
deliveries.
J
Matern
Fetal
Neonatal
Med.
2021;34(19):3247-3252.
doi:10.1080/14767058.2019.1697546
