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Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
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Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
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Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
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A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
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The physical form of a substance changes on changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. Vaporization occurs when the thermal motion of the molecules overcome the intermolecular forces, and the molecules (at the surface) escape into the gaseous state. When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase molecules...
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Behavioral Assessment of Hearing in 2 to 4 Year-old Children: A Two-interval, Observer-based Procedure Using Conditioned Play-based Responses
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A Telehealth-Based Transitional Care Model for Children with Medical Complexity.

Susan Fisk1, Fidelity Dominguez, Kari Price

  • 1Susan Fisk is clinical transitions program director at MGA Homecare in Denver. Fidelity Dominguez is a process improvement specialist, Kari Price is an RN, Mark S. Brittan, Brooke Geyer, and Christina Olson are hospitalists, Eric Cibak is manager of case management, Jill Callahan is a case manager, and Irina Topoz is a physician, all at Children's Hospital Colorado in Aurora. Proof of concept was supported through Colorado's Medicaid Upper Payment Limit funds (Grant No. 550002). The authors acknowledge the use of ChatGPT to improve the clarity of the language. Contact author: Susan Fisk, fiskds@comcast.net. The authors have disclosed no potential conflicts of interest, financial or otherwise.

The American Journal of Nursing
|January 22, 2026
PubMed
Summary
This summary is machine-generated.

A novel telehealth program for children with medical complexity (CMC) significantly reduced 30-day readmission rates from 17.6% to 10.1%. This nursing-led intervention effectively addressed care barriers and decreased emergency department revisits.

Keywords:
care transitionscomplex dischargespediatricsreadmissiontelehealth

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Area of Science:

  • Pediatric Healthcare
  • Nursing Practice
  • Health Services Research

Background:

  • Children with medical complexity (CMC) face high readmission risks and care barriers post-discharge.
  • Existing programs show variable success in reducing readmissions and care fragmentation for CMC.

Purpose of the Study:

  • To implement and evaluate a telehealth program using full-scope nursing practice to improve hospital-to-home transitions for CMC.
  • To achieve a 10% reduction in the 30-day readmission rate for CMC.

Main Methods:

  • A telehealth intervention involved virtual nurse visits 3-7 days post-discharge for eligible inpatients.
  • Follow-up care and handoff to outpatient teams within 30 days aimed to reduce care fragmentation.
  • Primary outcome: 30-day readmission rates; Secondary outcomes: care barrier identification/resolution and 30-day ED revisit rates.

Main Results:

  • The 30-day readmission rate decreased from 17.6% to 10.1% over four years (January 2020-June 2024).
  • Nurses identified care barriers in 51% of encounters, notably appointment scheduling and medical supply acquisition.
  • The 30-day ED revisit rate declined from 12.4% to 10.3%.

Conclusions:

  • Leveraging nurses' full scope of practice effectively reduced readmissions in a high-risk pediatric population.
  • The program's novel features included minimal exclusion criteria, integrated care teams, and a single point of contact for diverse needs.
  • Successful replication at another hospital indicates the model's potential for broader implementation to reduce readmissions in complex patients.