Written and Clinical Case Study Assessments 1

Assessment 1

Participants are required to adhere to the following points:

• An introduction and conclusion is not required
• Do not use headings within the questions
• Support your assignment with a minimum of twenty journal articles (< 7>
• Reference all work using American Psychological Association (APA)
• A pass in all questions is required to gain an overall pass mark
• Refer to the marking criteria for allocation of marks.

Billy, a 32 year old male, was admitted to the Intensive Care Unit (ICU) with a suspected overdose of tricyclic antidepressants. He is obese (weight 160 kg, height 172 cm) and has a history of depression and chronic back pain for which he takes oxycodone.
On admission to the emergency department, paramedics were maintaining Billy's airway with a combination of, jaw thrust, head tilt and guedel airway. Billy was obtunded with evidence of vomitus on his clothing. There was an attempted intubation en route which was unsuccessful.
Billy's initial observations were:

• Temperature 35.5 degrees Celsius
• Heart rate 140 bpm
• Blood Pressure 100/50 mmHg
• Respiratory Rate 22 b/min, shallow and laboured
• Oxygen saturation 92% breathing spontaneously via a bag valve mask with oxygen at 15 L/min
• Auscultation of lung sounds revealed decreased air entry bilaterally and expiratory wheezes.
• Arterial blood gas: pH 7.21, PaCO2 68mmHg, PaO2 90mmHg, HCO3 26mEq/L, SaO2 94%.

Questions

1. Describe the pathophysiology of Acute Respiratory Distress Syndrome, including a systematic interpretation of the arterial blood gas (consider PaO2/FiO2 - P/F ratio, assume PEEP is 5cmH2O). In view of Billy's current clinical condition, outline the proposed ventilation parameters you would suggest including rationales.
Using current evidence from the literature, critically analyse one of the mechanical ventilation strategies / parameters that you have chosen. It is recommended to discuss the topic selection with your Educator.

2. Twenty four hours after admission to the ICU, Billy's condition deteriorates. His current observations are:

• Temperature 39 degrees Celsius
• Sinus Tachycardia with a heart rate 130 b/min
• Pulse pressure variation or systolic volume variation (PPV or SVV) 15%
• Arterial Blood Pressure 85/55 mmHg
• Central venous pressure 5 mmHg
• Bounding peripheral pulses
• Urine output 20mls for the last hour and 80mL total for last 4 hours.

Discuss Billy's assessment data, incorporating the determinants of cardiac output and the underlying pathophysiology of severe sepsis. Using current evidence critically analyse the best practice therapy in relation to fluid resuscitation and vasopressor management.

Brief Summary of the Assessment Requirements

The assessment required students to answer two clinically focused questions related to Acute Respiratory Distress Syndrome (ARDS), mechanical ventilation strategies, and the haemodynamic deterioration associated with severe sepsis. Students were instructed not to include an introduction or conclusion, and not to use headings within the answers. Every response had to be supported with a minimum of twenty recent (less than seven years old) peer-reviewed journal articles, with all citations formatted using APA referencing. A pass in each individual question was mandatory for an overall pass. Students were also directed to refer to the marking criteria for clarity on expectations.

The first question required the student to:

• Describe the pathophysiology of ARDS,
• Provide a systematic interpretation of the ABG, including the PaO₂/FiO₂ ratio (assuming PEEP of 5 cmH₂O),
• Suggest appropriate ventilation parameters with rationales,
• Choose one ventilation strategy/parameter and critically analyse it using current evidence.

The second question required students to:

• Interpret assessment data associated with Billy’s deterioration 24 hours later,
• Link the findings to determinants of cardiac output and the pathophysiology of severe sepsis,
• Provide an evidence-based critique of fluid resuscitation and vasopressor therapy in severe sepsis management.

How the Academic Mentor Guided the Student Step-by-Step

Step 1: Clarifying Requirements and Structuring the Approach

The mentor first ensured the student clearly understood the instructions especially the requirement to avoid introductions, headings, and conclusions. They helped the student interpret the clinical scenario and break down each question into analytical components while keeping the writing structured through natural paragraphing instead of headings.

Step 2: Reviewing ARDS Pathophysiology and ABG Interpretation

The mentor guided the student to revisit essential ARDS pathophysiology: alveolar-capillary membrane injury, loss of compliance, shunt physiology, and inflammatory responses. For the ABG, the mentor demonstrated a systematic method pH evaluation, respiratory/metabolic assessment, oxygenation status, and finally calculating the P/F ratio to determine ARDS severity.

Step 3: Selecting Ventilation Parameters and Supporting Them With Evidence

Together, the mentor and student discussed ventilation settings appropriate for ARDS: low tidal volumes, cautious PEEP, controlled FiO₂, and lung-protective strategies. The mentor advised the student to choose one parameter for example, low tidal volume ventilation and develop a focused, evidence-supported critical analysis using research published within the last seven years.

Step 4: Analysing Deterioration and Linking to Sepsis Pathophysiology

For Question 2, the mentor helped the student interpret the new clinical data: high temperature, tachycardia, low arterial pressure, reduced CVP, poor urine output, and elevated PPV/SVV suggesting fluid responsiveness. Each finding was connected to the determinants of cardiac output and the systemic inflammatory response characteristic of severe sepsis.

Step 5: Evaluating Evidence-Based Fluid and Vasopressor Management

The mentor guided the student to examine current evidence for fluid resuscitation strategies (crystalloids, conservative versus liberal approaches, dynamic assessments) and vasopressor choices (primarily norepinephrine). They encouraged the student to critically compare guidelines, landmark studies, and recent trials to develop strong arguments supported by literature.

Step 6: Integrating Sources and Meeting the APA Requirement

The mentor worked closely with the student to ensure that more than twenty contemporary journal articles were used, correctly cited in-text, and compiled into a complete APA reference list.

Step 7: Reviewing for Academic Quality and Clinical Accuracy

Finally, the mentor reviewed the student’s drafted responses for clinical accuracy, logical flow, academic tone, and adherence to the marking criteria. They ensured the writing was succinct, evidence-based, and aligned with the expectations of postgraduate clinical practice.

Outcome Achieved and Learning Objectives Covered

The final solution successfully addressed all required components of the assessment, integrating theory, clinical reasoning, and current evidence. The student demonstrated the ability to:

• Explain complex pathophysiology in the context of ARDS and sepsis.
• Perform structured ABG interpretation and apply P/F ratio assessment.
• Justify ventilation strategies with evidence-based rationales.
• Critically evaluate one mechanical ventilation parameter using contemporary research.
• Analyse haemodynamic deterioration through the lens of cardiac output determinants.
• Apply up-to-date evidence for fluid resuscitation and vasopressor therapy in sepsis.
• Reference academic work using proper APA formatting.

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