This is a single-centre, prospective, open-label, non-comparative clinical trial assessing the on-body performance of an investigational drug delivery device (SQIN-Infusor) in patients hospitalised due to HF.

The investigational product consists of a novel higher concentration (30mg/mL) furosemide formulation developed for subcutaneous administration and a novel patch pump placed on the abdominal skin. This trial will investigate the on body performance of novel patch pump delivering the novel formulation. Study parameters include pharmacokinetic measurements and diuretic response following subcutaneous administration of 80mg of furosemide solution in 2.7mL in patients with heart failure (HF). Recruitment will be restricted to 1 site with a recruitment target of 20 patients. All trial related activities will be conducted in an inpatient environment.

Inclusion Criteria:

• • Written informed consent

  • Male or female ≥18 years of age
  • Meet ESC criteria for diagnosis of HF(4)
  • Inpatient with a primary diagnosis of HF requiring treatment with intravenous furosemide at dose

Exclusion Criteria:

• • Unable to consent to inclusion in study due to lack of capacity

  • Requiring treatment with intravenous furosemide at dose >200 mg per day as determined by the usual care team
  • Current inotropes, vasopressors or intra-aortic balloon pump therapy
  • Concomitant use of diuretics in 12 hours preceding administration of study drug with SQIN-Infusor
  • Systolic blood pressure (SBP) <90 mmHg
  • Pregnancy or breastfeeding
  • Left sided valve disease with planned surgery or percutaneous intervention
  • Type 1 myocardial infarction during index hospitalisation (type 2 myocardial infarctions are allowed)(5)
  • Any surgical or medical condition which prevents patient from ambulation during the infusion
  • Renal impairment, defined as eGFR < 30 mL/min/1.73 m2 at screening.
  • Patient on active cardiac transplant waiting list
  • Potassium <3.0 mmol/L
  • Potassium >6.0 mmol/L
  • Sodium <125 mmol/L
  • Any contraindications for furosemide administration as per furosemide SmPC
  • Any surgical or medical conditions, which in the opinion of the investigator may pose an undue risk to the subject, interfere with participation in the study or which may affect the integrity of the data

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