Demystifying the Pathogenesis of Sepsis

I want to begin with a coding scenario: sepsis and pneumonia are documented, and the coder captures these conditions and assigns MS-DRG 871 and APR-DRG 720 with severity of illness (SOI) 2. 

Sepsis presents challenges for coders as well as clinicians. I want to provide insight into the complex molecular and cellular processes involved in the pathogenesis of sepsis.

Assume that a chest X-ray identifies infiltrates in the left lower lobe of the lung. Sputum gram stain reveals dark blue and purple clusters of spherical bacteria. These are gram-positive bacteria with cell walls comprised of thick layers of peptidoglycan that absorb crystal violet dye, resist decolorization by ethanol or acetone, and do not counterstain with safranin.

Culture and sensitivity reveals methicillin-resistant Staphylococcus aureus (MRSA). MRSA has a mecA gene that encodes penicillin-binding protein 2a, which does not bind to the β-lactam ring in methicillin, other penicillins, and cephalosporins. This implies multi-drug resistance because MRSA is able to cross-link peptidoglycan for cell wall synthesis and survive in the presence of β-lactam antibiotics.

MRSA is virulent. Coagulase clots plasma, coats the bacterial cell wall, and prevents phagocytosis; hyaluronidase breaks down hyaluronic acid in the extracellular matrix; staphylokinase dissolves fibrins. Together, these enzymes pave a path for MRSA to spread through tissue, enter the bloodstream, and cause bacteremia.

So, how does MRSA bacteremia lead to sepsis?

MRSA has specific gram-positive, pathogen-associated molecular patterns (PAMPs) derived from peptidoglycan and lipoteichoic acid components of the cell wall. PAMPs are recognized by pattern recognition receptors (PRRs) located on the surface of macrophages. PRRs include toll-like receptors (TLRs) which process PAMPs, and via NF-κB transcription factor, induce the formation of coagulation factors and proinflammatory cytokines (e.g., TNF-α, IL-1, IL-6 & IL-12 and IFN-γ). In a parallel fashion, the anti-inflammatory cytokines (e.g., TGF-β, IL-4 & IL-10) are produced by macrophages and lymphocytes to balance the proinflammatory cytokines.

The imbalance between the proinflammatory and anti-inflammatory cascades leads to vasodilation, vascular permeability, hypotension, microthrombi deposition, and multi-organ failure, all reflected in SOFA and qSOFA scores for sepsis.

Facebook
Twitter
LinkedIn

Wilbur Lo, MD, CDIP, CCA, AHIMA-Approved ICD-10-CM/PCS Trainer

Dr. Wilbur Lo is Chief Medical and CDI Officer for cdiWorks, a Physician CDI consulting company. A US-trained Physician, Dr. Lo obtained his medical degree from the University of Toledo College of Medicine and completed a Residency in Anatomic and Clinical Pathology at Allegheny University Hospitals. During his Postdoctoral Fellowship at Vanderbilt University Medical Center, Dr. Lo conducted research in Renal Pathology and published in a peer-reviewed journal, Kidney International. At present, Dr. Lo is Lead Physician CDI consultant for a hospital in New York City. Outside the US, Dr. Lo has served as Physician CDI content and curriculum expert for AHIMA and AHIMA World Congress. Dr. Lo has extensive domestic and international CDI experience, with respect to MS-DRG, APR-DRG, IR-DRG and AR-DRG payment models.

Related Stories

Leave a Reply

Please log in to your account to comment on this article.

Featured Webcasts

Comprehensive Inpatient Clinical Documentation Integrity: From Foundations to Advanced Strategies

Comprehensive Outpatient Clinical Documentation Integrity: From Foundations to Advanced Strategies

Optimize your outpatient clinical documentation and gain comprehensive knowledge from foundational practices to advanced technologies, ensuring improved patient care and organizational and financial success. This webcast bundle provides a holistic approach to outpatient CDI, empowering you to implement best practices from the ground up and leverage advanced strategies for superior results. You will gain actionable insights to improve documentation quality, patient care, compliance, and financial outcomes.

September 5, 2024
Advanced Outpatient Clinical Documentation Integrity: Mastering Complex Narratives and Compliance

Advanced Outpatient Clinical Documentation Integrity: Mastering Complex Narratives and Compliance

Enhancing outpatient clinical documentation is crucial for maintaining accuracy, compliance, and proper reimbursement in today’s complex healthcare environment. This webcast, presented by industry expert Angela Comfort, DBA, RHIA, CDIP, CCS, CCS-P, will provide you with actionable strategies to tackle complex challenges in outpatient documentation. You’ll learn how to craft detailed clinical narratives, utilize advanced EHR features, and implement accurate risk adjustment and HCC coding. The session also covers essential regulatory updates to keep your documentation practices compliant. Join us to gain the tools you need to improve documentation quality, support better patient care, and ensure financial integrity.

September 12, 2024

Foundations of Outpatient Clinical Documentation Integrity: Best Practices for Accurate Coding and Compliance

This webcast, presented by Angela Comfort, DBA, RHIA, CDIP, CCS, CCS-P, a recognized expert with over 30 years of experience, offers essential strategies to improve outpatient clinical documentation integrity. You will learn how to enhance the accuracy and completeness of patient records by adopting best practices in coding and incorporating Social Determinants of Health (SDOH). The session also highlights the role of technology, such as EHRs and CDI software, in improving documentation quality. By attending, you will gain practical insights into ensuring precise and compliant documentation, supporting patient care, and optimizing reimbursement. This webcast is crucial for those looking to address documentation gaps and elevate their coding practices.

September 5, 2024
Preventing Sepsis Denials: From Recognition to Clinical Validation

Preventing Sepsis Denials: From Recognition to Clinical Validation

ICD10monitor has teamed up with renowned CDI expert Dr. Erica Remer to bring you an exclusive webcast on how to recognize sepsis, how to get providers to give documentation that will support sepsis, and how to educate to avert sepsis denials. Register now and become a crucial piece of the solution to standardizing sepsis clinical practice, documentation, and coding at your facility.

August 22, 2024

Trending News

Featured Webcasts

Post Operative Pain Blocks: Guidelines, Documentation, and Billing to Protect Your Facility

Post Operative Pain Blocks: Guidelines, Documentation, and Billing to Protect Your Facility

Protect your facility from unwanted audits! Join Becky Jacobsen, BSN, RN, MBS, CCS-P, CPC, CPEDC, CBCS, CEMC, and take a deep dive into both the CMS and AMA guidelines for reporting post operative pain blocks. You’ll learn how to determine if the nerve block is separately codable with real life examples for better understanding. Becky will also cover how to evaluate whether documentation supports medical necessity, offer recommendations for stronger documentation practices, and provide guidance on educating providers about documentation requirements. She’ll include a discussion of appropriate modifier and diagnosis coding assignment so that you can be confident that your billing of post operative pain blocks is fully supported and compliant.

October 24, 2024
The OIG Update: Targets and Tools to Stay in Compliance

The OIG Update: Targets and Tools to Stay in Compliance

During this RACmonitor webcast Dr. Ronald Hirsch spotlights the areas of the OIG’s Work Plan and the findings of their most recent audits that impact utilization review, case management, and audit staff. He also provides his common-sense interpretation of the prevailing regulations related to those target issues. You’ll walk away better equipped with strategies to put in place immediately to reduce your risk of paybacks, increased scrutiny, and criminal penalties.

September 19, 2024
Pediatric SDoH: An Essential Guide to Accurate Coding and Reporting

Pediatric SDoH: An Essential Guide to Accurate Coding and Reporting

This webcast, presented by Tiffany Ferguson, LMSW, CMAC, ACM, addresses the critical gap in Social Determinants of Health (SDoH) reporting for pediatric populations. While SDoH efforts often focus on adults, this session emphasizes the unique needs of children. Attendees will gain insights into the current state of SDoH, new pediatric Z-codes, and the importance of interdisciplinary collaboration. By understanding and applying pediatric-specific SDoH factors, healthcare professionals can improve data capture, compliance, and care outcomes. This webcast is essential for those looking to enhance their approach to pediatric SDoH reporting and coding.

August 8, 2024
Oncology and E/M Services: Compliance, Medical Necessity, and Reimbursement

Oncology and E/M Services: Compliance, Medical Necessity, and Reimbursement

Join Becky Jacobsen, BSN, RN, MBS, CCS-P, CPC, CPEDC, CBCS, CEMC, VP of CDM, for a webcast addressing oncology service coding challenges. Learn to navigate coding for infusions and injections alongside Evaluation and Management (E/M) services, ensuring compliance and accurate reimbursement. Gain insights into documenting E/M services for oncology patients and determining medical necessity. This webcast is essential to optimize coding practices, maintain compliance, and maximize revenue in oncology care.

July 30, 2024

Trending News

Prepare for the 2025 CMS IPPS Final Rule with ICD10monitor’s IPPSPalooza! Click HERE to learn more

Get 15% OFF on all educational webcasts at ICD10monitor with code JULYFOURTH24 until July 4, 2024—start learning today!