Graph kernels for chemical informatics

Increased availability of large repositories of chemical compounds is creating new challenges and opportunities for the application of machine learning methods to problems in computational chemistry and chemical informatics. Because chemical compounds are often represented by the graph of their covalent bonds, machine learning methods in this domain must be capable of processing graphical structures with variable size. Here, we first briefly review the literature on graph kernels and then introduce three new kernels (Tanimoto, MinMax, Hybrid) based on the idea of molecular fingerprints and counting labeled paths of depth up to d using depth-first search from each possible vertex. The kernels are applied to three classification problems to predict mutagenicity, toxicity, and anti-cancer activity on three publicly available data sets. The kernels achieve performances at least comparable, and most often superior, to those previously reported in the literature reaching accuracies of 91.5% on the Mutag dataset, 65-67% on the PTC (Predictive Toxicology Challenge) dataset, and 72% on the NCI (National Cancer Institute) dataset. Properties and tradeoffs of these kernels, as well as other proposed kernels that leverage 1D or 3D representations of molecules, are briefly discussed.

Credentialing for nurse practitioners: an update

The public has the right to safe, quality healthcare delivered by professionals with the appropriate education, training, and experience. The Joint Commission on Accreditation of Healthcare Organizations, the Accreditation Association for Ambulatory Healthcare, and managed care organizations take this commitment very seriously. One mechanism required by these agencies to ensure patient safety is the process of credentialing and delineation of clinical privileges for medical staff and allied health professionals, such as Acute Care Nurse Practitioners. This commitment extends to patients receiving healthcare through the technology of telemedicine and to those requiring emergency care resulting from trauma, disasters, and varying forms of terrorism. In addition, safeguards must be in place to prevent identity theft of healthcare providers, including Acute Care Nurse Practitioners. It is essential that Acute Care Nurse Practitioners be familiar with the regulations that impact and guide the process of credentialing and obtaining clinical privileges in a variety of venues.

The Growth Of Physician Medical Malpractice Payments: Evidence From The National Practitioner Data Bank

We used data from the National Practitioner Data Bank (NPDB) to study the growth of physician malpractice payments. Judgments at trial account for 4 percent of all malpractice payments; settlements account for the remaining 96 percent. The average payment grew 52 percent between 1991 and 2003 (4 percent per year) and now exceeds dollar 12 per capita each year. These increases are consistent with increases in the cost of health care. A preoccupation with data on judgments, extreme awards, or specific specialties results in an incomplete understanding of the growth of physician malpractice payments.

Health care fraud and abuse data collection program: technical revisions to healthcare integrity and protection data bank data collection activities. Interim final rule with comment period

The rule makes technical changes to the Healthcare Integrity and Protection Data Bank (HIPDB) data collection reporting requirements set forth in 45 CFR part 61 by clarifying the types of personal numeric identifiers that may be reported to the data bank in connection with adverse actions. Specifically, the rule clarifies that in lieu of a Social Security Number (SSN), an individual taxpayer identification number (ITIN) may be reported to the data bank when, in those limited situations, an individual does not have an SSN.

Nurses must cooperate with internal and external investigations

The problem with bad nurses or incompetent practitioners is that they may get away with murder because their poor behaviour is not effectively dealt with or challenged. A typical example of this is the nurse who works for an employer and after a period in the job gets into trouble and leaves before any further action can be taken. Many healthcare organizations, such as NHS trusts and private nursing homes, do not want either the hassle or the bad publicity, so they often sack the bad nurse without addressing the issues.

Impact of the National Practitioner Data Bank on resolution of malpractice claims

Policymakers and commentators are concerned that the National Practitioner Data Bank (NPDB) has influenced malpractice litigation dynamics. This study examines whether the introduction of the NPDB changed the outcomes, process, and equity of malpractice litigation. Using pre- and post-NPDB analyses, we examine rates of unpaid claims, trials, resolution time, physician defense costs, and payments on claims with a low/high probability of negligence. We find that physicians and their insurers have been less likely to settle claims since introduction of the NPDB, especially for payments less than dollars 50,000. Because this disruption appears to have decreased the proportion of questionable claims receiving compensation, the NPDB actually may have increased overall tort system specificity.

Standing up to the scrutiny of medical malpractice

Correct charting, updated policies and procedures, and firm staff understanding are critical components of avoiding medical malpractice.

Reconsidering medical malpractice reform: the case for arbitration and transparency in non-emergent contexts

This Article proposes a two-pronged legislative response to the current debate over medical malpractice insurance. The author does not advocate mandatory caps on malpractice damages, nor the imposition of a uniform regime on the field of medicine. Rather, he articulates some of the important legal, medical, and societal benefits that would come from embracing arbitration in the non-emergent medical malpractice context. The author also calls for the reformulation of the National Practitioner Data Bank to achieve greater transparentcy and to leverage advances in information technology and data-mining software to measure the risk levels of individual practitioners. This reform, in turn, would open up the possibility of greater subcategorization of premiums and more effective deterrence in medical malpractice insurance.

The medicolegal aspects of proctoring

Virtually every medical staff ensures surgeons technical competency by requiring a proctoring process. However, rarely do medical staff bylaws specify the relationship between completion of proctoring and acquisition of medical staff privileges. For this reason surgeons failing to acquire privileges because of adverse proctor evaluations might be subject to National Practitioners Data Bank reporting. Few proctors understand what their responsibilities are should they witness malpractice being committed. In the State of California, case law has demonstrated that proctors are immune from liability should they allow substandard practices to continue and fail to intervene on the patient's behalf. Alternatively, if the proctor intervenes on a Good Samaritan basis they are most likely protected from malpractice liability. We recommend the implementation of two processes to avoid legal pitfalls: (1) Liability can be minimized if proctoring consents are obtained that clearly delineate the proctor's responsibilities during the operation. (2) Medical staff bylaws should clearly specify the temporal relationship between application of privileges, duration of proctoring process and final acquisition of clinical privileges.

Peer review

Peer review is essential for ensuring quality medical care. In the 1980s a physician-plaintiff prevailed in lawsuit filed against peer reviewers who excluded the physician from a hospital's medical staff. The peer reviewers had acted to preserve their own economic interests. A multimillion-dollar verdict against the peer reviewers destroyed the community's only multispecialty practice and received national attention. Congress reacted by passing the Health Care Quality Improvement Act that granted sweeping, legal immunity for peer reviewers but also created the National Practitioner's Data Bank. The combination of the establishment of a public repository for physicians malpractice and medical staff privileging activity in combination with the near complete legal protection of peer reviewers has converted peer review from an evaluative to a punitive process. The peer review process and the laws that govern it should be reformed to regain its ability to improve and assure quality without being a threat to physicians.